4 Mr. G. M. Thomson on nen: Species of 



Subfam. Piioxides. 



Genus Amphilochus, C. Spence Bate. 



Amphilochus squamosus, n. sp. (PI. I. fig. 4.) 



Body broad and thick anteriorly, slender posteriorly. 

 Cephalon depressed anteriorly between the bases of the supe- 

 rior antennas. Eyes large, deep red in colour 5 not easily 

 made out owing to the numerous and dense reddish-black 

 spots with which the whole body is covered. Superior an- 

 tennae shorter than inferior ; peduncle shorter than flagellum, 

 which is seven -jointed and carries two long setse at the ex- 

 tremity of each joint. (The last joint of the peduncle bears 

 a minute one-jointed appendage.) Inferior antennae not one 

 fourth as long as body ; flagellum slender, longer than the 

 peduncle, smooth. Gnathopoda subequal and similar in form ; 

 meros and carpus produced into obtuse lobes, spinous at the 

 extremity ; propodos somewhat elongated, with a rounded palm, 

 and a few spines at the point of impingement of the slender 

 falcate dactylos. Pereiopoda slender, subequal. Antepenul- 

 timate pleopoda reaching almost to the extremity of the ulti- 

 mate, smooth ; penultimate much shorter, and, together with 

 the posterior (ultimate) pair, having somewhat unequal rami. 

 Length 0*1 inch. 



Under a low power of the microscope (a f) the integu- 

 ment, which is very thin, is seen to be covered with minute 

 scale-like marks and hooks. 



Subfam. Gammakides. 



Genus Eusirus, Kroyer. 



Eusirus cuspidatus, Kroyer, var. antarcticus, n. var. 



Several specimens of this crustacean were obtained by the 

 dredge in the harbour ; but as they differ in a few points from 

 both the generic and specific description as given in the 

 British-Museum Catalogue, p. 154, I think it advisable to 

 separate them as a distinct variety under the name antarcticus. 

 In regard, first, to the generic character, the maxillipeds are 

 certainly not unguiculate, the propodos being obtusely pointed 

 and densely clothed at the extremity with hairs, and the 

 dactylos being obsolete ; the cephalon also has a small ros- 

 trum. In specific characters it differs in the following re- 

 spects : — The two posterior segments of the pereion are smooth, 

 not produced back into teeth ; the cilia on the flagellum of the 

 superior are usually on every third (not second) articulus, 

 which is also produced downwards into a tubercle : the palm 



