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UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Figure 80. — Cnemidocarpa ijicubita (Sluiter): Three gonads from attachment surface. 



seem to differ somewhat from tliose of the present specimen from 

 Saipan Island, but it is very probable that such differences are specifi- 

 cally quite insignificant. As the general features of the inner struc- 

 ture is quite similar in these two specimens, the present individual 

 may safely be identified as S. ificubita. 



96. Cnemidocarpa chinensis, new species 



Figure SI 



HoLOTYPE. — USNM 11799: China; probably Amoy, received May 

 20, 1924, from S. F. Light. 



Pailvtypes. — USNM 11800 : same data. 9 specimens. 



Description. — Examined were the 10 specimens from China, all 

 are roughly bean-shaped in outline, from 12 mm. to 18 mm. in length 

 and 8-9 mm. in width, with their whole left side beneath. They are 

 considerably flattened laterally so that the thickness of animals is 

 only 3-4 mm. As two of the specimens were found attached to each 

 other side by side, they are possibly crowded in their natural habitat. 

 Branchial aperture subterminal and atrial aperture located very near 

 branchial, both apertures nearly sessile. Test very hard, about 1 mm. 

 in thickness, being densely encrusted and impregnated with fine sand 

 grains. Issuing from peripheiy of body except siphonal region are 

 10-20 tufts of short but rather thick rootlets. Mantle yellowish white, 

 of moderate thickness. Many small endocarps on inner surface, very 

 prominent tentacles along inner base of atrial siphon. 



In branchial sac inner longitudinal vessels arranged (D = dorsal, 

 V= ventral) : 



