CBANCH'S HIPPOLYTE. 289 



the marginal tooth is terminal. Internal antennae with 

 the thicker filament very slightly curved. Anterior feet 

 extending forwards a little beyond the antennal scale; 

 second pair with the wrist long, and formed of six articu- 

 lations. The junction of the thorax and abdomen is 

 very gibbous, the process on the posterior margin of the 

 third segment rounded, and but little prominent. The 

 middle portion of the tail has four pairs of extremely 

 minute teeth, so small as to be discerned with difficulty. 



Length about three-quarters of an inch. 



This little species, which is about the size of A. varians, 

 may be at once distinguished from it by the thicker thorax, 

 the more gibbous abdomen, the strong line of demarcation 

 between those two parts, and especially by the form of the 

 rostrum. It is a widely extended species, and in some 

 parts abundant. It was taken first by Mr. Cranch, and 

 afterwards by Mr. Prideaux, in the Kingsbridge estuary ; 

 it is also admitted into Mr. Couch's Cornish Fauna. I have 

 received it from Torbay, and from Salcombe Bay, through 

 the kindness of Mrs. Griffiths and Mr. Alder: it was 

 dredged at Poole by my relative, Mr. Henry Salter; and 

 I have specimens taken by Professor Forbes and Mr. 

 M' Andrew in Loch Fyne. Mr. Wm. Thompson gives it 

 as an Irish species, only on the authority of a specimen in 

 the collection of Mr. Vaughan Thompson : it is exceed- 

 ingly probable, however, that it will be again found on 

 the coasts of Ireland, as it has so extensive a range on 

 those of England and Scotland. 



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