NATURAL HISTORY. Ixxxiii 



rather longer than the preceding ; second pair of legs slender, very short, bristled, and 

 unarmed, in which last essential point it differs from the Poritophilus spitiosus of Dr. 

 Leach, Mai. Pod. Brit., t. 37, to which in other respects this species bears a near 

 resemblance." 



It is more rarely met with in the Arctic Seas than the Crangon Boreas, but a few 

 specimens were obtained near Felix Harbour. It was also found in a previous voyage 

 near the island of Igloolik in considerable numbers. 



3.— HIPPOLITE ACULEATA. 



ALPHEUS ACULEATUS.— Sa6 ; Supp. to Parry's Ut Voyage— p. ccxxxvii., pi, 2, figs. 9 & 10. 



Ross,App. to Parry's 3d Voyage — p. 120; and Polar Voyage — p. 206. 

 CANCER ACULEATUS.— fafc; Faun. Grcenl.—p. 239. 



A. (H.) thoracis carina dentibus quatuor, margine antico trispinoso, segmentis utrinque aculeatis, palpis 



pediformibus apice spinulosis. {Subine.) 



The Alpheus Aculeatus and A. Polaris of Sabine, belong to the genus Hippolite of 

 Leach {Mai. Pod. Brit.), on account of the second pair of claws being shorter than 

 the first. This arrangement, which appears to be now universally agreed to by 

 naturalists, is adopted by Latreille in the " Regne Animal," and is therefore followed 

 in this notice. It is an abundant species in the Arctic Seas. 



4.— HIPPOLITE SOWERBEL 

 Plate B, fig. 2. 



HIPPOLITE SOWERBEL— ieacA, Mala. Pod. Brit.—t. 39. 

 GAMMARUS SPINOSUS.— Sowtviy, Brit. Mis.—vo\. ii., pi. 21. 



II. rostro alto obtuso supra multi-serrato, apice emarginato serrulate ; subtus uni-serrato. (ifacA.) 



This species was first described by Mr. George Sowerby, in tlie " British Mis- 



*L 2 



