230 Annals oj the South African Museum. 



backwards. First antenna has 2 large basal joints and 2 minute 

 terminal lobes, both lobes and the posterior apical angle of 2nd 

 basal joint with thick tufts of setae. 



Second antenna, peduncle 4-jointed, basal joint large, flagellum 

 5-jointed. 



Peraeopods 1 and 2 stout, 3-jointed, 3rd joint with ill-developed 



unguis. 



Peraeopods 3-5 long, slender, 6-jointed, 2nd joint distally 

 expanded on front margin, 3rd and 4th joints small, 5th joint almost 

 as long as 1st, elongate oval, with short oblique palm defined by one 

 spine and bearing 2 others in the middle, finger longer than palm 

 but not half as long as 5th joint. 



Peraeopods 6 and 7 similar to peraeopods 3-5 but 5th joint is 

 slender and tapering, the finger as long as 5th joint, very slender 

 and tapering, nearly straight. 



Pleopods, peduncle short, broad, with 2 setae on inner apical 

 angle, rami subequal, set rather far apart on peduncle, tipped with 

 long plumose setae. 



Uropods, peduncle very short, outer ramus minute, tipped with se- 

 tae, inner ramus nearly as long as 6th pleon segment and not clearly 

 distinguished from peduncle, tapering gradually, tipped with setae. 



Length : 22 mm. ; $ : 2-5 mm. ; breadth $ : 14 mm. ; $ : 1 mm. 



Length of young female with same form as adult and with 

 attached male : 8 mm. ; of younger female with attached cryptoniscid 

 male : 5 mm. 



With the exception of Holophryxus giardi, Richardson (39 mm.), 

 this is the largest member of the family. 



Colour : In spirit, yellowish. 



Locality : Cape Point NE. by E. distant 36 miles, 650-700 fathoms. 

 2? $ , 1 $ juv. and 3 Cryptoniscus larvae. 8/7/03. Cape Point 

 ENE., distant 36 miles, 660 fathoms. 1 ?. 22/7/03. Cape Point 

 NE. f E., distant 29 miles, 470 fathoms. 1? with $ . 11/6/03. s.s. 

 "Pieter Faure." (S.A.M. Nos. A270-1, A2276.) 



The host is unknown ; but in the same bottles were numbers of a 

 deep-red Decapod allied to Nematocarcinus (at present awaiting 

 identification), as well as a few specimens of Acanthephyra purpurea, 

 Glyphocrangon sculpt us and Polycheles beaumontii. The presence of 

 one Zonophryxus in a bottle containing only Nematocarcinus may 

 justify the view that this latter Decapod is the only host. 



Only three other species of the genus are known : Z. retrodcns, 

 Richardson, 1904, from Hawaiian Islands ; Z. trilobus, Richardson, 

 1910, from Philippine Islands ; and Z. grimaldii, Koehler, 1911, off 

 the coast of Portugal. 



