Paliniiotiis, Iphiplateia 



203 



produced. Pleopod 3 witb the coupling spines on a short, but very distinctly 

 pvoduced process. üropod 1, pediincle nither longer than the louger of the 

 two rami, both rami uarrow. üropod 2, peduncle not reaching end of 

 telson, the Single ramus narrowly oval. Telson triangulär, with rounded apex. 

 L. rather under 5 mm. 



Wtitsun's Bay [East-Australia]. Lo\v-tide line. 



4. Gen. Iphiplateia Stebb. 



1899 Iphiplateia (Sp. un.: I. irhitdeggel). T. Stebbing in: Tr. Liiin. Soc. London, 



srr. L' r.l p. 4i I. 



Body imich depressed, pleon strongly flexed. Head immersed betweeu 

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

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

 Short, subequal in length, antenua 1 the broader, antenna 2 attached to the 

 rear of antenna 1. on under side of head. Upper lip with convex distal 

 margiu. Maxilla 1, inner plate wanting. outer with 5 spines, palp wauting, 

 luit Position for it indicated. Maxilla 2, inner plate short and broad, with 

 apical spine-teeth, outer narrow, coutinuous with the base. Maxillipeds 

 rather broad, outer plates feebly arraed, reaching apex of 2"^ Joint of palp, 

 linger of palp small, cylindrical, tipped with a long seta. Gnathopods 1 and 2 

 simple. Peraeopods 3 — 5, 2"^ Joint very large, 4^^' broad. Pleopods 2 and 3, 

 lieduncle with produced process of inner margin. Pleopod 3, inner ramus 

 rudimentary. üropods 1 and 2 biramous, 2'^ tlie sliorter. üropod 3 very small, 

 1-jointed. Telson eutire. 



1 spet'ies. 



1. I. whiteleggei Stebb. 1899 I.%o., T. Stebbing- in: Tr. Linn. Soc. London, 

 ser. 2 c. 7 p. 415 t. 34. 



Body (Fig. 52) forming a broad oval, by help of the 1***^ Joint of antenna 1 

 and of 2'^ Joint of peraeopods 3 — 5; dorsal line feebly angular or smooth, 

 peraeon segment 7 slightly upraised, pleon segment 1 projecting backward 

 in a prominent tubercle, pleon small, segment <> dorsally undeveloped. 



Side-plate 1 subtriangular, 2*^^ and 3*^ oblong, 4*^^ very 



broad. excavate behind, 5*^'^ to 7*'^ small. bilobed, front 



lobe the larger. f]yes small, oval. dark. Antenna 1, 



l^^ Joint nearly as broad as long, 



witli large inner lobe, 2*^ similar, 



but smaller, 3'^ narrow, flagellum 



very small, 2-jointed. Antenna 2, 



basal joints apparently soldered to 



underside of head. ultimate Joint of 



peduncle rather smaller than penulti- 



niate, slightly longer than the small 



2-jointed flagellum. Epistome roun- 

 ded above. !Mandible, cutting edge 



({uadri-dentate, spine-row of 3 minute 

 spinules; a broad pellucid spine tipped with a setule perhaps represents 

 the molar. Gnathopod 1, 2*^ Joint not nearly reaching distal border of 

 side-plate. 3^ as long as 4^^!. ö^'^ a little longer than the tapering 6t^\ which 

 fonns no palra, finger small. curved. Gnathopod 2 like gnathopod 1, but 



Fi 



•i. I. whiteleggei. 

 Dorsal view. 



3. 1. whiteleggei. 



Pleopod 3 

 with hooked spines. 



