454 Mv. J. Paget on a new Helix and a new Ilydrobia. 



XLII. — Description of a new Helix from Montpellier, and a new 

 Hydrobia from Nice, with Observations on some varieties of the 

 Extra-marine Shells of those districts. By John Paget, Esq. 



Helix micropleuros. 



Animal breve, supra nigrescens^ subtus albescens, semipellu- 

 cidum; tentaculis superioribus griseo-nigrescentibuSjCrassiusculis 

 et obtusis, inferioribus brevioribus et pallidis. 



Testa minutissima, subdepressa, supra planiuscula, subtus 

 convexa, costata, aperte umbilicata; apertura rotundato-lunata ; 

 peristomate recto, simplice, acuto ; anfractibus 3-3|^, convexius- 

 culis, paulatim accrescentibus et sutura sat perspicua separatis, 

 ultimo majore. Fusca, sericina. 



Diam. l|-2, long. 1 mill. 



Hab. prope Montpellier. 



This beautiful little Helix is nearly allied both to the H. rupes- 

 tris and H. pygmcRa. From the H. rupestris it is distinguished 

 by its fewer convolutions, flatter shape, thinner shell and smaller 

 size; from the H. pygmcea by its less convex whorls and shallower 

 suture, by its last whorl sensibly larger than the rest, its larger 

 mouth and somewhat larger size, and from both more especially 

 by its epidermic ribs, which, althougb closer, are no less evident 

 than those of the H. costata (Miiller) . 



I found this Helix after heavy rain on the dead holly leaves 

 on some waste ground, called the Bois de la Moures, about a 

 quarter of a mile south of the high-road between Montpellier and 

 Mauguio, in the south of France. 



Hydrobia varica. 



.<4m*mflZ elongatulum, fuscum, rostro proboscidiforme, tentaculis 

 elongatulis griseo-coerulescentibus et pellucentibus, disco obtuso, 

 griseo-ccerulescente. 



Testa minutissima, conoideo-ventricosa, vix perforata, tenuis- 

 sime striata, in ultimo anfractu gibbosa; apertura ovato-pyriformi, 

 obliqua, ad summum obtuse angulata, peristomate subreflexo et 

 acuto ; anfractibus 3-4, convexis, sutura sat profunda separatis, 

 ultimo maximo, dimidium testae efformante. 



Tenuissima, corneo-albescens, limo inquinata. 



Operculum subpellucidum, in apei'tura profunda situm, limo 

 vel limi punctulis inquinatum. 



Long. 1^-2, diam. 1| mill. 



Hab. prope Nizza Maritimam. 



This Hydrobia is nearly allied to the Hydrobia gibba (Drap.) 

 which is found in such abundance at the source of the Lesz, 

 near Montpellier, but it is distinguished from it by its less elon- 



