204 Iphiplateia, Iphinotus 



5*^ aud 6*^ jüiiits more nearly equal. Peraeopods 1 and 2, 4^^ Joint a little 

 wider, not longer than 3*^, 5*^*^ as broad as long, much shorter than 6^^, 

 6*^ and 7**^ nearly agreeing in all the limbs of peraeon, Peraeopod 3. 2^ Joint 

 with the broad expansion produced below the 3*^ Joint, 4*^ as broad as long, 

 lobed behind. Peraeopod 4, 2^ and 4*^ joints larger than in peraeopod 3. 

 Peraeopod 5 with 2*^ Joint shorter than in peraeopods 3 and 4, but even wider, 

 otherwise nearly as peraeopod 3. Pleopod 1, peduncle without process. but 

 carrying 5 or 6 coupling spines. Pleopod 2, peduncle much shorter than 

 in pleopod 1. with short, broad process carrying 5 or 6 coupling spines. 

 Pleopod 3 (Fig. 53), peduncle very short, with long narrow process carrying 

 3 coupling spines, inner ramus minute, oval, unjointed, without setae, outer 

 ramus normal. Uropod 1, peduncle shorter than the curved outer ramus, 

 longer than the straight inner one. Uropod 2 much smaller, otherwise like 

 the 1'^^ Uropod 3, each cousisting of a small oval lamella, nearly concealed 

 by the telson. Telson semi-oval, with subacute apex. L. about 5 mm. 



Watson's Bay [East-Australia]. 



5. Gen. Iphinotus Stebb. 



1882 Iphigenia (Sp. un.: I. typica) (non C. F. Schumacher 1817, 3Iollusca!), G. M. 

 Thomson in: Tr. N. Zealand Inst., ?;. 14 p. 237 ] 1899 Iphinotus (Sp. un.: I. chiltoni). 

 T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v. 7 p. 419. 



Body much depressed, pleon strongly flexed. Head immersed between the 

 projecting 1^* pair of side-plates, Square, feebly rostrate, front corners prominent, 

 carrying the eyes. Side-plates 1 — 4 large, outspread. Antennae 1 and 2 nearly 

 as in Iphiplateia (p. 203), as also the mouth-parts, except that the maxillipeds 

 have the 4^^ Joint well developed, unguiforra. Limbs of the peraeon nearly as 

 in Iphiplateia, except that the 2** and 4*^ joints are very much smaller in 

 peraeopod 5 than in peraeopods 3 and 4. Pleopods 1 — 3 with both rami well 

 developed. Pleopods 2 and 3, peduncle laterally produced into a long and strong 

 process. üropods 1 and 2 biraraous, peduncle rauch longer than the rami. 

 Uropod 1 slender, uropod 2 stout. Uropod 3 membranous, not biranious. 

 small. Telson entire. 



1 species. 



1. I. typicus (G. 31. Thoms.) 1882 Iphigenia typica, G. 31. Thomson in: Tr. N. 

 Zealand Inst., v. 14 p. 237 t. 18 f. 4 '; 1899 Iphinotus chiltoni -\- Iphigenia typica, 

 T. Stebbing in: Tr. Linn. Soc. London, ser. 2 v.l p. 419 t. 35 b; p. 420. 



Body broad oval, with dorsal carina. Eyes rounded oval, dark, Antenna 1, 

 1*** Joint large, distally widencd, 2*^ cylindrical, 3*^ scarcely longer than broad, 

 flagellum with 3 small joints. Antenna 2, moderately stout, ultimate Joint of 

 peduncle longer than penultimate, flagellum with 5 joints, last 4 very small, setose. 

 Upper lip broader than deep, distal margin almost straight. Gnathopods 1 and 2 

 and peraeopods 1 and 2 in general as in Palinnotus thomsoni (p. 202), except that 

 the tinger is abruptly narrowed at base of the sharp hooked nail, and has there 

 a strong setule. Peraeopods 3 and 4, 2^ Joint very large, a little louger in 

 peraeopod 3 than in peraeopod 4, 4*'' Joint gi'eatly expanded, bind lobe nearly 

 double the lengih of the front margin. Peraeopod 5, 2^ and 4*^ joints very 

 much smaller than in peraeopods 3 and 4. Pleopod 1, peduncle not very 

 long, not expanded. Pleopod 2, peduncle short, produced on inner side to 

 a long, powerful process, can-ying 4 coupling spines. Pleopod 3 like pleopod 2. 



