234 AUSTEALIAN MALACOSTEACA. 



422. G-lycerina tenuicornis. Plate iv., fig. 3. A.M. 



Glycera tenuicornis, Haswell, 1. c, Vol. iii., p. 257, pi. viii., 

 fig. 6. 



Eyes long-oval, nearly meeting above. Superior antennae as 

 long as the ceplialon and first three segments of the pereion, first 

 joint of peduncle very stout, longer than the others, second and 

 third joints very short ; flagellum longer than peduncle, slender ; 

 appendage nine- jointed. Inferior antenna? longer than the 

 superior pair ; peduncle subequal with that of the latter ; flagellum 

 thrice as long as the peduncle. Anterior gnathopoda long, 

 filiform ; basos narrow, compressed ; ischium, meros and carpus 

 all sub-cylindrical and slender ; propodos about one-third of the 

 length of the carpus, irregularly ovoid, narrowed distally, its 

 ventral border armed with curved seta?. Posterior gnathopoda 

 elongated, slender, but stouter than the anterior pair ; propodos 

 nearly twice as long as carpus, sub-quadrate, nearly as broad as 

 long, the palm concave, the ventral and distal angle prominent, 

 acute. Third pair of pereiopoda much shorter than the rest ; 

 the basos circular, serrated posteriorly. Basos of following pairs 

 oval, non-serrated ; meros, carpus, and propodos hairy. Fourth 

 and fifth pairs of pleopoda with the rami slender, stylif orm ; rami 

 of the last pair broad-lanceolate, acute. Lateral halves of the 

 telson broad-lanceolate, pointed. 



Howich Group, N. E. Australia ; Port Jackson. 



Sal-Family Ampeliscades. 



Cephalon produced anteriorly, cone-shaped, the superior 

 antenna?, being placed at the apex. No compound eyes, but four 

 small simple organs of vision. Gnathopoda more or less sub- 

 chelate, not powerful. Coxa) deep, as also those of the first two 

 pairs of pereipoda. \_S. I>\] 



Genus Ampelisca, Kroyer. 



Cephalon tapering anteriorly. Eyes four, minute, simple, 

 situated near the anterior extremity of the cephalon. Superior 

 antenna) simple, attached to the extremity of the cephalon. 

 Inferior antenna) arising very far posterior to the base of the 

 superior. Mandibles furnished with an appendage. Gnathopoda 



