Zoological Society. 335 



mens in Mr. Cuming's collection were obtained, and the single ex- 

 ample now referred to may have possibly been brought away from 

 the same place. 



Of the curious genus Aehatinella, two species, livida and alba, are 

 in the collection, both procured at the Sandwich Islands. 



Of Succinea there is a new species, marked from Mazatlan ; I 

 have named it Succinea cinyulata. 



There are two species of Cyclostoma, the fine C. grande (no lo- 

 cality is attached to it), and an equally beautiful one which I haye 

 named C purum. 



The following diagnoses of the new species in the collection have 

 been modeled on those of Dr. L. Pfeiffer, whose admirable ' Mono- 

 graphia Heliceorum Viventium ' is one of the most valuable contri- 

 butions to Malacology that have been published for many years. 



Helix Pandora. H. testd obtecte perforatd, depresso-globosd, 

 tenui, rugulosd, concentrice minutissime striatd, anfructibus supra 

 peripheriam fuscis, infra et prope peripheriam albidis fusco cin- 

 gulatd, basi albidis ; aperturd rotundatd intus fused albido-fasci- 

 atd, margine interna incrassuto albo ; peristomate reflexiusculo, 

 extus albo-labiato, margine columellari dilatato, reflexo, umbili- 

 cum occultante. 



Diam. max. 17, min. 16, alt. 14 mill. 



Collected near the Straits of Juan del Fuaco ; allied to the last 

 species, but very distinct. 



Helix Kellettii. H. testd angusti umbilicatd, depresso-globosd, 

 tenui, rugulosd, granulatd, fulvd, spird subturbinatd, sordid^ flavo 

 conspersd, rvfo-unifasciatd, anf7-actibus 6, convexiusculis, ultimo 

 ad peripheriam fascid pallidd cincto, basi subinflato ; aperturd 

 lunato-rotundatd, intus pallide fused, unifasciatd ; peristomate 

 reflexiusculo, margine columellari dilatato, reflexo, umbilicum oc- 

 cultante. 

 Diam. max. 22, min. 19, alt. 19 mill. 



This species is nearly allied to Helix Californiensis, Lea. It dif- 

 fers in the more pyramidal contour of the spire, in the less tumid 

 body-whorl, and consequently differently shaped, more lunate, slightly 

 elongated mouth. The margin of the mouth is more reflected. 



Helix vellicata. H. testd aperte umbilicatd, tenui, convexo- 

 depressd, subnitidd, sulcato-striatd, striis minutissimis spiralibus 

 decussatd, Icete viridibus ; spird convexiusculd, anfructibus 6, ulti- 

 mo rotundato magna, antice dilatato, subdescendente ; aperturd 

 perabliqud, lunata-oblongd ; faux alba, peristomate margine sub- 

 reflexo, superne deflexo-sinuato. 



Diam. max. 22, min. 18, alt. 8 mill. 



From Panama ? 



Distinguished from its near allies by the peculiar deflexion of the 

 upper portion of the lip-margin. 



BuLiMUS CHEMNiTZioiDES. Bul. testd subpcrforatd, turrito- 

 subulatd, regulariter costatd, castis numerosis, nitidulis, flaviduld. 



