l!J8 AMI'HIPODA NORMALIA. 



the foiu'tli and til'th segments obtusely rounded. Eyes subreni- 

 foiTD . Superior antennic scarcely half the length of the animal ; 

 joints of the peduncle subequal ; flagellum as long as the peduncle, 

 articuli broader than long ; secondary appendage small. Inferior 

 antennae having the peduncle scarcely as long as that of the 

 superior ; flagellum as long again as that of the superior, articuli 

 broader than long. Fii-st paii' of gnathopoda having the carpus 

 half as long as the propodos, slightly produced inferiorly ; pro- 

 podos tapeiing, palm imperfectly defined, armed vrith. two or three 

 strong spines. Second pair of gnathopoda uniform with the first. 

 Pereiopoda subequal, the three posterior pairs gradually increasing 

 in length. Antepenultimate and penultimate pairs of pleopoda 

 armed with short strong spines on the upper or posterior margin 

 of the rami ; ultimate pair having the rami equal, lanceolate, and 

 fringed with ciha. Telson lanceolate. 

 Length : male, -^ of an inch ; female, rather more than 1 inch. 



ffab. Baffin's Bay {Admiral Ross and General Sabine) ; Godthaab, 

 Greenland, 60fathoms (Holhdll); lcelaiid{Dreivse7i) ; Xorway(i?rt^A^-e) ; 

 Eastern shores of Scandinavia (Liljeborg) ; Shetland (2Ir. Barlee) ; 

 Banif {Mr. Edward) ; Shgo {Mr. Tliompson) ; Grand Manan, U.S. 

 {Stimpson). 



2. Amathia carinata. (Plate XXXY. fig. 10.) 



Amathia carinata, Rathke, Fauna der Krym, taf. 29. 



This species is so similar to A. Sabinii, that had not Eathke, in the 

 ' Xova Acta Acad. Leopold.' p. 71, expressly stated that it is distinct, 

 I should have been inclined to unite them. I have merely seen the 

 figm'e of A. cannata in the ' Fauna der Krym,' judging by which, 

 the only differences appreciable are the following: the less sharp 

 character of the dorsal carinal teeth, each being rounded at the apex ; 

 the antennae being more nearly equal in length ; and the gnathopoda 

 having the propoda less tapering and the palmae more defined. 



Jfab. Balaklava Bay, Crimea, amongst Fucus {Bathhe). 



3. Amathia dentata. 



Gammarus dentatiis, Catalogue of the Crustacea in the Museum of 

 the Jardin des Plantes. 



I could not detect any appreciable distinction between this and the 

 two preceding species ; but having neglected to make a di'awing of 

 the animal, I am induced to separate it from both of them on account 

 of the distance of their respective habitats. 



Hah. Pondicherry {M. Perrottet). 



