68 



21. BuLiMTJS CANALicuLATUs, Pfr. Bul. testd umbiUcatd, obligue 

 fusiformi, ruguloso-striatd, nitidd, albido, carneo et spadiceo mar- 



moratd ; spird turrito-conicd, acutd; anfractibus 7 vix convexius- 

 culis, ultimo spird vix longiore, basi valde constricto-carinato ; 

 columelld arcuatim antrorsum elongatd ; aperturd ovali, basi cana- 

 liculatd ; peristomate simplice, tenui, margine dextro vix eipansi- 

 usculo, columellari dilatato, reflexo. 



LoDg. 37, diam. 14 mill. 



Hab. Bolivia. 



22. BuLiMus CASTANEUS, Pfr. Bul. testd vix perforatd, ovato- 

 acuminatd, solidiusculd, longitudinaliter confertim striatd, lineis 

 spiralibus distantioribus decussatd, unicolore castaned ; spird brevi, 

 conicd, aculiusculd ; anfractibvs 4į vix convexiusculis, ultimo in- 

 flato, 2—Z longitudinis suboeąuante ; columelld tenui, subsimplice ; 

 aperturd ovali, intus saturate fuscd, nitidd; peristomate vix in- 

 crassato, brevissime refiexo, marginibus callo tenui junctis, colu- 

 mellari vix dilatato. 



Long. 70, diam. 39 mill. 



Hab. Nova Granada ; Vegas on the river Quendeu. 

 Nearly allied to Bul. Gibbonius, Lea ; distinguished by its trans- 

 verse strise, closed umbilicus, peristome, etc. 



" Description of a new species of Amphipeplea," by Dr. L. PfeifFer. 



The shell I am describing belongs to the genus of fresh\vater 

 shells distinguished by Nilsson from Limnteus under the name of 

 Amphipeplea, and sufficiently characterized by the shape and habits 

 of its animal, perfectly agreeing with our new species, according to 

 Mr. Cuming's Information, who first discovered it, and by -vv-hose 

 name I am pleased to illustrate the species. 



Amphipeplea Ctjmingiana, Pfr. Amph. testd ovato-globosd, tenu- 

 issimd, longitudinaliter confertim striatuld, nitidissimu, pellucidd, 

 pallide corned; spird brevissimd, mucronulatd, callo tenui semi- 

 obtectd; columelld nulld; margine anfractuum interno arcuato, 

 appendice membranaceo (deciduo) munito ; aperturd amplissimd, 

 semi-ovali, margine supero breviter arcuato, patente. 



Long. 30, diam. 22 mill. ; apertura 26 mill. longa. 



Found at Naga, province of South Camerines, island of Luzon, by 

 H. Cuming, Esq. 



Mr. Thompson of Belfast read a paper to prove that the Larus 

 capistratus, Temm., is not a distinct species from L. ridibundus, and 

 exhibited a series of specimens of both forms in different statės of 

 plumage obtained in the neighbourhood of Belfast. The difFerences 

 between these supposed species are — 



Ist. In size ; but a female specimen of L. ridibundus, \vith black 

 hood, bill and legs arterial blood-red, ■vvas exhibited, agreeing in the 

 size of body, tarsi, &c. ■with L. capistratus. 



2nd. The colour of the tarsi and toes attributed to L. capistratus, 

 and as distinguishing it from L. ridibundus, is a mere transition shade. 



