:28 Frederick Chajjniaii : 



Occurrence. — This freshwater species is fairly abundant in the 

 Boneo Swamp deposit. 



Cypris tenuisculpta sp. nov. (Plate IV., Figs. 7, 7a, h.) 



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

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

 .moderately 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 

 ilines. 



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

 Observations. — This species closely resembles Cypris lateraria, 

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

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

 i;tui*e, which in the present species is finely lineate, C. lateraria hav- 

 ing a granulose surface with scattered tubercles. 



Occurrence.- — Common in the Boneo SAvamp deposit. 



Candonocyjyris assimiUs, G. 0. Sars. Plate IV., Figs, 8, 8a. 



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

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

 Skrifter, I. Math. Kl. No. 5, p. 36, pi. V., Figs. 2a-c. 

 Observatio?is. — In outline, seen from the side and above, the 

 fossil specimens perfectly agree with Sars' New Zealand species, 

 which is a freshwater form. The valves are slightly unequal, as 

 seen 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 viridulaj> of Avhich the above appears to be a 

 fuscous variety. The straight dorsal border figured by Dr. Brady 



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. 



