CUMACEA 285 



Genus Iphinoe Bate, 1865 



Iphinoe fagei sp.n. (Figs. 3 and 4). 

 Occurrence : 



St. WS 980, 100-50 m., z$$, 5$9 (2 ovig.), 9 juv.; 50-0 m., 2<J<?, 9?? (1 ovig.), 6 juv., night station. 



St. WS 981, 50-0 m., 1$, 8 juv., day station. 



St. WS 982, 100-0 m., 17 juv., day station. 



St. W T S 988, 100-50 m., 44 (JcJ, 237?$ (82 ovig.), 222 juv.; 50-0 m., i7<Jc?, 70$$ (33 ovig.), 41 juv., night station. 



St. WS 989, 50-0 m., 1 15c? 6*. 36 ovig. $$, ca. 7300$$ and juv., night station. 



St. WS 990, 100-0 m., i<J, 7$?, 16 juv., day station. 



St. WS 1063, 50-0 m., 6$$, 82 juv., night station. 



Ovigerons female. Length 8 mm. Body slender. Carapace rather less than twice as long as broad, 

 slightly more than twice as long as high ; upper surface slightly undulatory, with 0-5 small denticles 

 set about one-third back from the front end; dorsal carina faint; pseudorostrum prominent in side 

 view, rather blunt, with its edges slightly crenulated; antero-lateral angle prominent with a large 

 tooth at the angle and several small teeth on either side ; eyelobes broad, pointed in front, with distinct 

 lenses, but not strongly pigmented. 



The first antenna with the proximal joint the longest, the second longer than the third; the flagellum 

 two-jointed, with one aesthetasc and two long setae; accessory flagellum very small, one-jointed. 

 Second antenna, mandible and maxillae as in /. trispinosa (Goodsir) (Sars, 1900). The third maxilliped 

 with the basis more than z\ as long as the remaining joints together, with its prolongation reaching to 

 the end of the prolongation of the merus. 



Five pedigerous somites exposed. First peraeopod with the basis about as long as the remainder, its 

 external border crenulated ; the lower edge of the ischium with several small teeth. Second peraeopod 

 about equal in length to the third, with the terminal joint longer than the two preceding joints. Last 

 abdominal segment smoothly rounded posteriorly. The uropods longer than the last two segments of 

 the abdomen; the peduncle longer than the subequal rami, with twenty-four spines on the inner 

 border; the proximal joint of the endopod about half the length of the distal, with four and thirteen 

 spines on their respective inner edges; the distal joint of the exopod armed on its inner edge with 

 seven plumose setae and terminating in three spines. 



Adult male. Length 7-5 mm. Carapace without teeth above, with the pseudorostrum less prominent 

 than in the female; the antero-lateral corners rounded. 



The second antenna reaching to the base of the uropods. The coxal plates of the first peraeopods 

 with a smooth posterior border armed with several plumose setae, with a median tooth set just behind 

 them on a broad tubercle on the second sternite. The basis of the second peraeopod with an internal 

 spur. The third sternite with a broad median tubercle. The uropods relatively shorter than in the 

 female, with a greater number of spines, more than forty, in two rows on the inner edge of the 

 peduncle. 



Colour, yellowish-white in alcohol. 



This species resembles /. trispinosa in some respects, but is easily distinguished by its less slender 

 carapace and blunter pseudorostrum; the dorsal teeth, when present, are set further forward on the 

 carapace than in trispinosa; the eye is less prominent; the uropods in the female are more slender and 

 have a greater number of spines on the peduncle ; the prolongation of the basis of the third maxilliped 

 reaches farther along the merus ; in the male the armature of the thoracic sternites is more simplified 

 (see Fage, 1951a). 



The other species of Iphinoe which have been recorded from the west coast of Africa comprise 

 /. africana Zimmer and /. brevipes Hansen. The present species is at once distinguished from these 



