134 rUOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



G. B. Sby., from California, and stated that the radula showed the 

 species to be a true Columhella. 



Mr. Da Costa exhibited the type of Bulimus [Bryptus) Salteri, 

 G. B. Sby., and a variety from Peru ; also B. atramentarius, Pfr., 

 and B. Adamsoni, Gray?, from Bogota, B. Powisianus, Petit, from 

 the River Cauca, and a variety from the Valle de Magdalena, 

 Colombia. 



On behalf of Mrs. Kenyon were exhibited a specimen of Valuta 

 undulata, Lam., having a thickened callus on the columella ; 

 a specimen of Pirula ficoides, Lam., having a notch in the outer 

 lip ; specimens of Cyprcea tigris, Linn., showing parallel lines in the 

 structure of the shell — all from South Australia. 



Specimens in illusti'ation of their respective papers were exhibited 

 by J. C. Melvill, E. A. Smith, and E. R. Sykes; the last-mentioned 

 also exhibited British mariue shells, including Defrancia Leufroyi, 

 Mich., from Herm, Lepton squaiuomm, Mout., from Guernsey, and 

 the Brachiopod Argiope decollata^ Chemn., from the Scilly Isles. 



ORDmARY MEETING. 

 Friday, 8th Mat, 1896. 

 Prof. G. B. Howes, Sec. L.S., President, in the Chair. 

 The following papers were read : — 



1. " On the Proostracum of a Belcmnite from the Upper Lias of 

 Gloucestershire." By G. C. Crick, F.G.S., etc. 



2. " List of the Land-shells of the Islands of Batchian, Ternate, 

 and Gilolo." By E. A. Smith, F.Z.S., etc. 



3. " Descriptions of four new species of Marine Shells from 

 Bombay." By J. C. Melvill, M.A., F.L.S., etc. 



4. "Note on the occurrence of PetricoJa plioladiformis, Lamk., at 

 Shellness, Kent." By J. E. Cooper. 



The author, while shore -hunting, at Easter, 1896, on Shellness, 

 near Sandwich, Kent, found several specimens of PetricoJa jilioladi- 

 fonnis, Lamk. ; though none of them contained the animal, they 

 were, with few exceptions, fresh and in good condition, so that there 

 seemed to be every probability this species was now living in Pegwell 

 Bay. The shells were scattered over at least two miles, and in 

 most cases were associated with single valves of Pholas Candida, to 

 which they bore a strong external resemblance. The specimens 

 collected showed considerable variation in breadth, and were more 

 solid than North American examples in his possession. 



Mr. W. Crouch exhibited specimens of Petricola pholadiformis from 

 the Biver Crouch, Essex, and remarked that two living specimens 

 had, to his knowledge, been taken in that river, both at Cricksea, 

 a mile west of Burnham, in association with Pholas criiipata. He 

 contrasted the Essex forms with the descriptions and figures given by 

 Gould of the North American ones. He considered the species, whicli 

 he first noticed in July, 1890, had been introduced, and had "come 

 to stay." 



