THK OSTKACODA 

 SI (50) Inner anterior edge of right shell plai„ n.-jg. , _,^, ^y 



5. (53) Dorsal seU of furca .ore than one.h.f ,..„„. of .Merlin.,, .,,, 

 53 (5.) Dorsal -a^of Jurca^not ™re than ,„..ha,f length of ,u. 



>lcnnin.tl 



54 (55) Left shell larger than the right, an.l its cIlu- 

 1270 h). " *" 



'•> not lulxrculatcil-ig, 

 ^6 



55 (54) Left shell smaller than the right and with •. tmv.. f 



along the inner margin iV^:^^^^:^:'^ "^^^^^'^^-'^ ^^^^^i« 

 Cypris (Cyprinotus)prll,uida Sh 



56 (57) Right-shell margin tuberculate only at anterior and |>ostcn.vcnlral 

 margins. Shell about four-sevenths as high as Um^ (Kig. 

 1270 a). . Cypris {Cyprinotiis) inconfirucns Ramdohr 1S08. 



