Magazin de Zoologie. 363 



rican coast, and, it would appear, of the Greenland shores also. 



MargineUa C/eiyi, figured in PI. 73^ 's allied to M. Adansonii, from 

 which, however, it is well distinguished : it inhabits the coast of 



Senegal Heli^ Poeyi, from the interior of the island of Cuba, 



occupies PI. 74, but the shell only is given This is followed 



by Webb, and Vanbeneden's notice sur les inollusques du genre 

 Vaumxct.'L'LA., et description d'une nouvelle espece de ce genre, — a 

 valuable paper which we have already noticed. Vol. i. p. 492. Two 

 plates, one zoological and one anatomical, are devoted to its illus- 

 tration Noie sur deux especes nouoelles d' Aplysies, par MM. 



Vanbeneden et Webb. These fine species were procured from the 

 shores near Nice. Their characters are : 



1. A Brugnatellii, colore aurantiaco : alis parum elongatis ; 

 tentaculis posterioribus colore privatis, ore membranis duabus ac- 

 cessoriis lateralibus munito. Testa ovata, tenuissima, fragili, pel- 

 lucida, striis concentricis eleganter notata. Rostro dextrum in- 

 clinato et in uncinam parvulam abeunte. — Long. 35 millim. larg 

 de la coq. 12 millim. 



2. A Webbii, corpore limaciformi, virescente, maculis nigris 

 flavisque ornato ; alis palii parvis et partes testae medias minima 

 vestientibus ; siphone fere nullo. Marginibus pedis anterius dila- 

 tatis ; ore membranis accessoriis munito. Testa ovata elongata 

 compressa, striis linearibus sculpta incisura ad dextram sinuata, ros- 

 troque bidentato. — Long. 25 millim. larg. de la coq. 15 millim. 



Crustacea. — The contributions to this class belong to its lower 

 forms, and the species are all described by Guerin. The Pterelas 

 is a new genus of the Isopodes, Fam. Cymothoades, nearly allied 

 to iEga. The species is named Pt. Webbii, from the naturalist who 



procured it on the coast of Portugal. Description de quelques 



genres noiiveaux de Crustaces appurtenant a la famille des Hype- 

 vines. The genera are Primtio, nearly allied to Phronima, a native 

 of the South American seas ; Hieraconyx, which will stand in the 

 system near to the Themisto ; and Pronoe, near to Typhis. The 

 paper contains besides descriptions of a new species of Phronima, 

 viz. Ph. atlantica ; and of the Oxycephalus oceanicus, a very curi- 

 ous animal from the shores of Chili. The Phlias serratiis de- 

 lineated in pi. 19, forms a new genus of Amphipodes, affined to 

 Amphitoe and Gammarus. M. Gaudichaud found this pretty little 



species on his passage from the Maldive islands to Port Jackson. 



PI. 14 represents a new oniscidous insect named Deto echinata, 

 brought from the east by Olivier. It resembles in form our com- 

 mon Oniscus asellus. 



