748 ntoK. c. o. sAiis on [M:>y '\ 



oxtivinitv a('mi\in!\te, posterii))' lilunli'il. N'mIvcs ratlicr thin and 

 pellucid, slightly une(|UMl, tlic Irt't (>\('rlaii|>in^ the right in front 

 and partly also behind liy a nai-row hyaline l)oi-der. (Surface of 

 shell smooth with only very slight traces of pilosity. 



Male (Hg. 12) of nearly same .size as female and scarcely 

 (littering in the shape of the shell. Sexual charkcters, however, 

 easily observable in the dense coils of spermatic tu])es occurring 

 in tlie posterior part of each valve, and in the translucent ejacu- 

 latory tubes. The latter with numerous (up to 14) whoi-ls of 

 ilen.sely crowded chitinous .stripes. Copulatory appendages of a 

 similar structure to that in the male of C. suumta, l)ut with the 

 terminal pieces distinctly bilobed. 



Length of .shell 0'60 mm., height 0-34 mm., width 0-24 mm. 



Remarks. — This form, like C citnningtoni, is un(h)ubtedly a 

 genuine Cifpridopsis. It differs from that species, as also from 

 the two African species described by Dr. Vavra and Dr. Miiller, 

 in the shape of the shell and in the imperfect pilosity of the same. 



Occurrence. — Some few specimens of this form were foinid in a 

 sample from Victoria Nyanza (2(i9), taken 25/4/05 at l^ukoba 

 (W. shore of lake). 



Genus 3. Zoxocypris IVIiiller. 



liemark'i. — This genus Wivs established in the year 1898 by 

 Dr. Ci. W. Miiller to co)nprise two African species, Z. ni'idaiinscari- 

 ensis and Z. eleijans, both of which were distinguished by a, 

 very peculiar sculpture of the shell, a character which has given 

 rise to the generic name projiosed by Dr. Miiller. The gtnus is 

 nearly allied to Cyprido'p still more to Pionoci/pris, but 



differs in .some points from . h these genera,, and can well be 

 retained. Two species referable to this genus are descrilicd 

 l)elow. 



23. Zoxocypris costata Vijvra. (Plate LXXII. figs. 1-3'.) ^' 



C>/pridopsis costata V<ivra, Die Siisswasser Ostracoden Deutsch- 

 O.st-Afrikas, p. 10, figs. 1-8. 



Syn. : Zonocypris maxkigascariensis ?tiiller. 



Specific Characters. — Fe.male. Shell very tumid ; seen laterally 

 (fig. 1) of a somewhat rhomboidal shape, greatest height occurring 

 a. little in front of the middle and slightly exceeding half the 

 Ivngth, anterior extremity rounded, posterior obli(piely truncated, 

 dors;il margin forming a rather even curve, ventr.al margin slightly 

 sinuated in the middle; seen dorsally (tig. 2) broadly oviform in 

 shape, grt^atest widtli exceeding two-thirds of the lenglh and 

 occurring l)ehind the middle, anterior extremity much nai'rower 

 than posteri(jr. Valves slightly unequal, the left overla})j ing the 

 right .somewhat along the anterior extremity, as also a little at 

 the upper coi-ner of tlie posterior one ; anterior lips of both valves 

 somewliat thickeneil. but with only slight ti'ace of hairs. Surface 

 of shell .sculptured witii \ery conspicuous elev.-ited I'idges ai-ranged 



