:28 Frederick CJiapman : 



Occurrence. — This fresh-water species is fairly abundant in the 

 JBoneo Swamp deposit. 



Vi/jjris tenulscidpta sp. nov. (Plate IV., Figs. 7, 7fl, h.) 



Descrijytion. — Valve seen from the side, subreniform, highest in 

 -front, narrowing slightly to the posterior. Edge view subovate, 

 jnoderately tumid, more compressed anteriorly. Valves slightly 

 .unequal. Dorsal margin roundly angulate near the middle, 

 directly sloping to the extremity. Both ends evenly rounded. 

 Ventral margin incurved at the middle, and curving outwards to 

 meet the evenly rounded anterior border; the latter having a 

 narrow depressed margin. Surface of shell finely but distinctly 

 .sculptured with closely set longitudinal and anastomosing raised 

 •lines. 



Length, 1.3 mm.; greatest width, 0.77 mm. 



Observations. — This species closely resembles Cypris laferaria, 

 King, 4 especially in the figures given by G. 0. Sars^ from the 

 ■ Sydney examples. The chief difference lies in the superficial sculp- 

 ture, which in the present species is finely lineate, C. lateraria hav- 

 ing a granulose surface with scattered tubercles. 



Occurrence. — Common in the Boneo S^vamp deposit. 



Cffiido/ioci/pris assimd/s, G. 0. Sars. Plate IV., Figs, 8, 8a. 



Candonocypris assimdis, G. 0. Sars, 1894, Contrib. know- 

 ledge Freshwater Entom. N, Zealand, Vidensk, Selsk, 

 Skrifter, I. Math. Kl. No. 5, p. 36, pi. V., Figs. la-c. 

 Ohservations. — In outline, seen from the side and above, the 

 fossil specimens perfectly agree with Sars' New Zealand species, 

 W'hich is a freshwater form. The valves are slightly unequal, as 

 ■seein in at least one of the complete carapaces in the present col- 

 lection, and the muscle-spots number 7, with 2 arranged slightly 

 forward and below the others. The. surface of the shell is- marked 

 with excessively fine, elongate reticulae and a few punctations. 



The writer would be inclined to place under the above genus 

 Brady's Cypris viridula,^ of which the above appears to be a 

 fuscous varietv. Ihe straifrht dorsal border figured bv Dr. Bradv 



4. Cypris lateraria. King, Proc. R. Soc, Tasmania, "Vol. III., pt. I., 1855, p. 



65, pi. X.. G. G. 



5. G. O. Sars, 1896. On Freshwater Entom., from the neighbourhood of 



Sydney, partly raised from dried mud, Kristiania, p. 53, pi. VII., Figs. 

 'ia-c. 

 •6. Proc. Zool. Soc. Lond., 1886, p. 88, pi. VIII. Figs 1, 2. 



