430 Annals of the South African Museum. 



1887. Hemiarthrus Griard & Bounicr (date quoted from Stebbing). 

 1893. Stebbing, Hist. Crust, p. 417. 



1898. Phryxus Sars, Crust. Norw. vol. 2, p. 214. 



HEMIARTHRUS NEMATOCARCINI Stebb. 



1914. Hemiarthrus nematocarcini Stebbing, Ann. S.A. Mus. vol. 15, 



pt. 1, p. 47, fig. 



The only further remarks necessary concerning this species is 

 that the pleon of the 9 ' s subacute and entire. This character 

 distinguishes the species easily from H. abdominalis (Kroyer). 



FAMILY CYPRONISCIDAE. 



1889. Cyproniscidae Griard & Bonnier, Trav. Stat. "VVimereux, 



Bopyriens, p. 221. 



GEN. CYPKONISCUS, Kossm. 



1884. Cyproniscus Kossmann, SB. K. Ak. Wiss. Berlin, Hft. 22, 



p. 460. 

 1902. Stebbing, S.A. Crust, pt. 2, p. 75. 



CYPRONISCUS CBOSSOPHORI Stebb. 



1901. Cyproniscus crossophori Stebbing, Knowledge, vol. 24, p. 100. 



1902. id. I.e. p. 76, pi. 15s. 



Three specimens of the host Crossophorus africanus Stebb., from 

 the " Pieter Faure ?1 collection, have been examined for this parasite. 

 In one 2 immature $ $ and 3 larvae were found, in another 3 larvae, 

 and in the third 1 adult $ . 



The adult 9 is symmetrical, flat on the side apposed to the host, 

 convex on the outer side, anterior end narrower than the posterior, 

 shaped therefore like half a pear. About 10 segments are indicated by 

 shallow grooves. No attachment cord was found, the parasite appear- 

 ing to be quite free in the incubatory pouch of the host. Length : 

 6'25 mm. ; breadth and depth : both 3 mm. 



The immature ? ? measure ca. 2 x 1'5 mm. and show indications 

 of 7-9 segments. Head with a rudimentary oral cone, and on each 

 side of this a short antenna-like process, which is constricted near the 

 end so as to appear 2-jointed, but there is no suture. 



