^"•^^^'- FRESH-WATER OST RA CODA-SHARPE. 983 



Oenus established by Vavra to inchulo a very .small, pluinp Ch^i- 

 cod with fuival armature of three terminal seta-, hut no spines. Hut 

 two species are known, C. tenuicaudu from Zanzibar and ('. wHtata 

 from Madagascar and also East Africa. 



13. STRANDESIA Stuhlmann, 1889. 



Sirandesia Stuhlmanx, Vorl. Bericht iiber eine Reise Nacli ().*t-.\trika, Sit/. K. 

 Akad. der Wis8., XXXII, 1889; Berlin.— V .a vra, Siiss\vas.«er-r)stra.-. Zaii- 

 zibars, Beiheft d. Hamb. Wis.s. Anstalten, XII, 1895, p. 18. 



Shell 2 mm. to 3 mm. long-. Natatory seta^ reaching tip> ..i' end 

 claws. Furca very straight, but normal. Propagation se.xual. 

 Testes of male in form of concentric half circles in posterior pail of 

 shell. Most characteristically, however, the right shell is armed with 

 a dorsal longitudinal ridge-like iiange, having thorn-like projections at 

 both extremities. Ductus of thickly arranged rows of chitinous 

 spines. 



No American forms known. 



14. ACANTHOCYPRIS Claus. 1892. 



Ariintliocypris Claus, Beitrage zur Keiintniss der SiiHswasser-Ostracoden, Arl>. 



Zool. Inst. Wien, X, 1892, p. 50. 

 Xeocifpris Sars, Fresh-water Entomostraca of S. America, Archiv. fur Math, og 



Xaturvid., XXIV, No. 1, 1901, p. 29. 



Shell with a characteristic dorsal ridge-like process on right valve, 

 which is sharply produced at the posterior extremity. Natatory setae 

 reaching tips of end claws. Furca extraordinarilv large. Partheno- 

 genetic. 



This genus was established b}^ Claus to receive a peculiar South 

 American form, having the peculiar dorsal flange. It is Avorthy of 

 note here that its only relative so characterized [Strandesia) is from 

 Zanzibar and East Africa. Other examples indicate a close structural 

 n lation l)etween the Ostracoden fauna of Africa and South America— 

 a relationship which is so apparent in other faunal groups of these 

 continents. Neocyprh gladiator Sars evidently belongs here. 



No American forms known. 



15. STENOCYPRIS Sars, 1889. 



StenocypriH Sars, On some fresh-water Ostracoda raised from drieil Australian 

 mud, Christ. Vid. Helsk. Forh., No. 8, 1889, p. 27.— Vavra, Siisswasser-Ostni- 

 eoden Zanzil)ars, Beiheftd. Hamb. Wiss. Anstalten, XII, 1895, p. 10.— Vavra, 

 Siisswasser-Ostrac. Deutsch-Ost-Afrikas, Tierwelt (^st-Afrika, IV, 1897. p. 14. 



Shell usually long and narrow. Natatory seta^ reaching tips of end 

 claws. Furca large, somewhat lamelliform, its dorsal edge usually 

 pectinate, dorsal seta rudimentary or absent. Propagation sexual. 



This genus was oricrinallv described as being parthenogenetic, biit 

 the investigations of Vavra (18!«5). Daday (1892). and MouWa (ISl.l) 

 disprove this. 



