Mr. P. H. Gosse on neiv or little-known Marine Animals. 307 



Class CRUSTACEA. 



Order Podophthalma. Fam. Pal.^monid^. 



Genus Hippolyte (Leach). 



H. spinus (Sowerby). 



A single specimen of this interesting ^Esop Prawn^ obtained 

 by me while dredging on the oyster-bank off Ilfracombe, in 

 August last, enables me to mention its colours in a living state. 

 It was about |ths of an inch long. 



The carapace, with the rostrum, and all the organs of the head 

 are opaque white ; the abdomen is dull purplish-red, except the 

 summit of the third segment, which is white ; the swimming- 

 plates of the tail and half of the penultimate segment are white ; 

 the legs ringed with white and red. The surface of the abdomen 

 is beset with a few scattered erect hairs. 



Order Edriophthalma. Earn. Corophiad^. 



Genus Unciola (Say). 



U. irrorata (Say). 



Of this rare American Crustacean, which has not hitherto 

 been recognized in Europe, I obtained a specimen at Weymouth 

 between tide-marks in April last. Its colour was wholly white. 

 It lived in one of my small vases for a week or two, manifesting 

 no noticeable peculiarity of manners, except that it delighted to 

 hide among the bushy sea-weeds. 



Fam. AsELLiD^. 



Genus Tanais (M.-Edw.). 



T. Savignyi (Kroyer). 



This minute species, now first recognized as British, I obtained 

 also at Weymouth, in coralline from tide-marks. Both this and 

 the preceding I have figured in my ' Manual of Marine Zoology,^ 

 figs. 246 & 256. 



Fam. Pranizad^. 

 Genus Praniza (Leach). 

 P. cceruleata (Montagu). 



I took a specimen parasitic on a young Cottus bubalis in a 

 rock-pool at Ilfracombe, in August. The mouth of the Crus- 

 tacean was so firmlv imbedded in the cheek of the fish, that it 



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