Free-Living Nematodes from Hot Springs in China and Formosa. 23
No males found.
Ten females, Changchow, from two springs (cf. description of Greenia).
Description:
Length: 0.74 (0.66-0.81) mm.
X-27 (22-28). B—7.5 (5.4-9.6). X-10.3 (8.8-13.8).
N-10.
The cuticle exhibits a very fine transverse striation which under high magnification dissolves into minute dots. There are small bristles irregularly arranged on the cuticle. The anterior end has six small papillæ, two lateral and eight submedial seta. The mouth cavity is armed with a larger dorsal and two smaller subventral teeth. The nerve ring is slightly posterior to the middle of the esophagus. Posteriad the esophagus ends in a bulb without valves. The cells of the intestine are granulated. The ovaries are reflexed. The vulva is slightly anterior to the middle of the body. Three cells form the spinneret gland.
C. chungsuni has a certain similarity to C. minimus (Cobb) 1893; in the latter form, however, the amphids are behind the pharynx and there is only one subventral tooth.
C. chungsani is named after Dr. Sun Yat-sen.
Monhystrella ginlingensis n. sp.
(Pl. 12, Figs. 18-20).
Diagnosis: Monhystrella, the anterior end of which has eight sub- medial and two lateral setæ and a circle of six papilla. Pharynx clongated; its distal part wider and with three minute teeth (one dorsal, two subventral). Amphids circular at the height of the proximal end of the pharynx.
No males found.
Fourteen females, Tangshan near Nanking, overflow from spring, water temperature where collected 35° C. Algal vegetation.
Length: 0.53 (0.40.6) mm.
-31 (30.5-38). B-6.5 (5.7-6.6). 8—3·5 (3-3-4.2).
114.
1 hot
Five females, Sozan, Formosa, overflow from a sulphur spring. Tem- perature where collected 35° C.
Length: 0.47 (0.43-0.52) mm.
Description:
∞-28.2 (25-31). B.-6.2 (5.3-6.6). 8—2.9 (2.2-3.3).
11-5.
The cuticle is smooth, with few bristles irregularly arranged. The anterior end bears eight submedial and two lateral setæ and six papilla. The mouth opening is somewhat triangular. The pharynx is long and in its distal part wider than proximally where it considerably decreases in diameter.
Supplement No. 1, 1932,
102
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