288 Zoological Society. 



short, incurved ; thumb narrow, compressed, elongated, with a sharp 

 apex and a strong tooth near the distal extremity. 



Feet short and weak, as in Notopus ; the first tibia bicarinated ; 

 the tarsus subquadrate, anteriorly bicarinate, with a scalpel-shaped 

 claw ; the second tibia one-keeled, with the tarsus oblong, and a 

 sharp elongated trigonal claw ; the third tibia subtriangular ; tarsus 

 short, flattened, subtrigonal, with a falcate claw ; fifth tibia trian- 

 gular, very short, flattened; tarsus transverse-ovate, with a small 

 narrow claw. 



Abdomen of the male seven-jointed, the joints from the first to the 

 sixth nearly of the same width as in Notopus, and the last joint tri- 

 gonal. 



Cosmonotus differs from Notopus, De Haan, by wanting the post- 

 frontal, elevated, denticulated ridge ; by the dorsal keel ending ab- 

 ruptly in front, instead of terminating in a central frontal spine ; in 

 the front being notched with a single small spine on each side ; in 

 the thorax being much compressed, more especially in front, and in 

 the produced and angular shape, while in Notopus it is almost straight 

 across in front ; and in the sides being entire, with a short sharp 

 spine at the antero-latero angle. 



The cut represents this species of twice the natural size, and is 

 named in compliment to J. E. Gray, Esq., F.R.S., Keeper of the 

 Zoological Department in the British Museum. 



December 12. — W. Spence, Esq., F.R.S., in the Chair. 

 The following paper was read : — 



Descriptions of nineteen new species of Helicea, from the 

 Collection of H. Cuming, Esq. By Dr. L. Pfeiffer. 



1 . Helix Kurri, Pfr. Hel. testd mediocriter umbilicatd, depressd, 

 tenui, punctis distantibus sub lente scabriusculd, diaphand, corneo- 

 albidd, fascid 1 angustd rufd, alterd obsoletd infra peripheriam 

 ornatd ; spird plana 4 ; anfractibus 4^, primis convexiusculis, ultimo 

 sensim descendente, utrinque subplano, antice subconstricto ; aper- 

 turd obliqud, mbtriangulari-lunari ; peristomate simplice, tenui, 

 marginibus conniventibus, supero late expanso, basali reflexo, colu- 

 mellari brevi, triangulatim dilatato. 



Diam. 25, alt. 10 mill. 

 Locality unknown. 



2. Helix Gardeneri, Pfr. Hel. testd subperforatd, turbinatd, 

 solidd, striis longitudinalibus et spiralibus distantioribus decussatd, 

 nitidd, castaned; spird elevatd, acutiusculd ; anfractibus 6% con- 

 vexiusculis, ultimo majore, sublcevigato, ad peripheriam cingulo 

 albo ornato ; aperturd oblique lunari, intus alba ; peristomate sim- 

 plice, recto, margine columellari subincrassato , superne subdilatato, 

 perforationem fere claudente. 



Diam. 22, alt. 15 mill. 



Found on leaves of trees in the forests of Ceylon, 8000 feet above 

 the level of the sea (Dr. Gardener). 



3. Streptaxis Funcki, Pfr. Str. testd subobtecte umbilicatd, de- 



