130 Zoological Society. 



show the diflFerence between it and CE. Phellandrium, to which it is 

 nearly allied. As this and the preceding paper will appear at length 

 in the ' Annals and Magazine of Natural History,' it is unnecessary 

 here to give an abstract of them. 



4. Mr. James M'Nab read the first part of a journal kept by him 

 while on a tour through the United States and the Canadas, during 

 which his attention was chiefly directed to the botany and horticul- 

 ture of these countries. 



Mr. Trevelyan laid before the meeting cones of Pinus sylvestris, 

 exhibiting on the one side the character of P. sylvestris, and on the 

 other that of P. Mughus. He stated that the cones were taken from 

 a tree near Taunton in May 1 843, differing in no other respect from 

 the ordinary state of P. sylvestris, and the phsenomenon now pre- 

 sented by them apjjears to substantiate the views of those botanists 

 who believe the two species to be identical. 



ZOOLOGICAL SOCIETY. 



March 14, 1843. — William Yarrell, Esq., Vice-President, in the Chair. 



A paper by Mr. G. B. Sowerby was read, containing the following 

 descriptions of new species of Shells belonging to the genus Cyclo- 

 stoma. The species described are chiefly from the collection of H. 

 Cuming, Esq. 



Cyclostoma suturale. Cycl. testd orbiculato-depressd, tenui ; 

 epidermide olivaced indutd ; anfractibus 3—4 rotundatis, trans- 

 versim tenuissime striatis ; aperturd circulari, superne emargina- 

 tione obsoletd ; peritremate tenui, margine acutiusculo ; umbilico 

 patulo ; operculo concinne spirali. 



Hab. in umbrosis Demerarae. 



A few specimens of this species were received many years ago by 

 G. C. Bainbridge, Esq., of Liverpool. 



Cyclostoma rugulosum. Cycl. testd orbiculato-subdepressd, tenui, 

 translucidd; anfractibus 4—5 rotundatis, rugulosis; suturd distinctd ; 

 aperturd rotundatd, superne acuniinatiusculd ; peritremate tenui, 

 margine acutiusculo ; umbilico magno. 



Hab. in Jamaica. 



Found among the shells in the collection of the late G. Humphrey. 



Cyclostoma semistriatum. Cycl. testd orbiculato-subdepressd, 

 tenui, albidd, fasciis pallide fuscis interruptis ; spird subprominuld, 

 apice obtusiusculo ; anfractibus 4—5 rotundatis, superne longitudi- 

 naliter striatis, infra, levibus ; suturd distinctd ; aperturd circulari, 

 superne subacuminatd ; peritremate obsoletissime subreflexo, tenui, 

 margine acutiusculo ; umbilico magno ; operculo sulco externo spi- 

 rali, anfractibus 4-5. 



Hab. in India Orientali, in regione Poonah dicta. 

 Cyclostoma translucidum. Cycl. testd subglobosd, subpellucidd , 

 albd ; epidermide corneo- indutd; spird hreviusculd,obtusd; anfrac- 

 tibus quatuor rotundatis, prope suturam elevatiusculis , striatis, 

 superne rugulosis ; aperturd subcirculari, superne subacuminatd ; 



