94
16
R. HOEPPUI And H. J. Chu,
LIST OF COLLECTIONS.
Locality
Date
Bottles Collected
Positive Bottles
Water Temperature
Species Found
Foochow
July, 1930
18
4.5-51° C.
Plectus chengmah-
liangi n. sp.
Changchow August, 1930
3
2
| 39°-48.5° C.
Greenia orientalis,
n. g. n. sp.
Microlajmoides lingi, n. sp. (adults and Jarva).
Aphelenchus pariet-
-----
Undetermined larvær.
Cyatholatimus chung,
sani, n. sp. Diploscapter coronatu
(Cobb), 1893. Microlaimoides lingi,
n. sp.
Aphelenchus pariet
1785.
Greenia orientalis,
n. g. n. sp.
Monhystera filiformis
var. Jukienensis,
n. var.
Microlaimus
sp.
(larvæ),
Tangshan near Nanking
August, 1930
12
+
35°-50° C.
Monhystrella
gin.
lingensis, n. sp.
Greenia
orientalis,
Wen Ch'uan near Peiping
Sept. 1930
4
34° C.
Sozan, Formosa
August, 1930
2
35° C.
n. g. n. sp.
Dorylaimus sp.
(larva).
Undetermined larvæ.
Trilobus allophysis. Greenia orientalis, n. g. n. sp.
Monhystrella gin-
lingensis, n. sp. Dorylaimus sp.
(larvæ).
The Hong Kong Naturalist.
Free-Living Nematodes from Hot Springs in China and Formosa.
PLACES OF COLLECTION :
Foochow, capital of Fukien Province.
17
Foochow, where eighteen samples have been collected, possesses numerous hot springs which are used mostly for the supply of bath houses. We have no data of a chemical analysis of any of the hot springs of Foochow and do not know whether such an analysis has ever been made. The 18 samples were taken from different places. Nine out of 18 proved to be negative. The springs are in deep wells. The water in all places which were visited was several metres below the surface of the soil; it is taken up by wooden buckets. Down in the well in all visited places the water was steaming hot and the high temperature, which doubtless makes life impos- sible for free-living nematodes together with the fact that it is hardly possible to collect samples down in the rather narrow wells, caused us to take samples either from the wooden tanks into which the buckets are emptied and from which the water flows through pipes or open canals to the bath-houses, or from stone tanks in which the water is stored before being used in the bath- house. The temperature of the water in the different tanks showed great variations. The highest temperature under which nematodes occurred in our material from Foochow was 51° C.; under this temperature only larval stages were found.
Chungchow, on the banks of the Dragon River, Fukien Province. Two of the three samples which were collected at Changchow con- tained rather numerous nematodes; the third one was negative. We wish to thank Mr. Ling Shao-wen, Assistant in the Department of Zoology of the University of Amoy, for having made the collections. The two positive samples were taken from two different places. Both springs are in deep wells and the probable reason that both samples were so rich in material is that they were taken from the wall of the well 5 and 13 feet respectively above the surface of the water. In the first case (collection 5 feet above the surface) the water had a temperature of 39o C., in the second case the Whereas, therefore, in both cases the water temperature was 48.5° C. nematodes were not permanently living in the thermal water, there can be no doubt that due to the frequent splashing of water from the buckets the worms were frequently exposed to the influence of the water of its original or slightly decreased temperature. According to reports from Changchow, and from the previous experience of one of us (Hoeppli) in Changchow that there is a slight smell of hydrogen sulphide coming from the thermal water, we feel certain that the water contains sulphur.
Tangshan near Nanking.
There are altogether five hot springs in Tangshan with their overflow running through the fields. Samples were taken from the overflow from each of them. Four samples (3`and 1) from two different streams with algal vegetation contained nematodes. The water temperature where the samples were taken was 35° C. (3 samples) and above 50° C. (1 sample); in the latter case only larval stages were found.
Supplement No. 1, 1934.
95