CRUSTACEA. 407 



Herbst's is merely a bad copy of that of Phipps. Mr. West- 

 wood's, now given, is remarkably characteristic, and the ana- 

 tomical details are extremely correct and interesting. A re- 

 ference to the Plate will render any particular description of 

 these parts unnecessary. 



There were numerous young contained in the ovigerons 

 pouch of the female figured in the Plate. They had undergone 

 their metamorphosis, and were in every respect like the parent, 

 with the exception of the antennae, which were thicker, and less 

 numerously jointed. 



Hab. Northumberland Sound, in seven fathoms. 



L^MODIPODA. 



CAPRELLA SPINIFERA (n. s.). 



PLATE XXXV., fig. 2. 

 Segmentis omnibus corporis spinis armatis. 



The head in this very distinct species is very short, the eyes 

 round and black ; the superior antennae almost as long as the 

 body, of which length the peduncle constitutes nearly half; the 

 first joint cylindrical, half as long as the second, which is slightly 

 enlarged forwards ; inferior antennas about half the length of 

 the superior; the first joint of the peduncle very short, the 

 second only a little longer, the third three times as long as 

 the first and second. Footjaws four-jointed, slightly curved ; 

 first segment of thorax somewhat pyriform, with several minute 

 tubercles, and two little spines close to its junction with the 

 head ; the second, third, and fourth segments thickened at the 

 middle, at which part is a partial circle of spines, as well as 

 several others at the anterior and posterior part; fifth seg- 

 ment largest at the posterior part, and spined as the others ; 

 sixth and seventh segments very short, narrowed anteriorly ; 

 the seventh furnished with a pair of simple curved appeiidages. 

 Abdominal segment extremely small, with two pairs of appen- 

 dages, of which the smaller pair are simple, and the larger two 

 jointed. Anterior pair of legs slender and weak, scarcely twice 



