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Show 1870.] MR. G. B. SOWERBY ON NEW SHELLS. 219 the two sorts interbreeding, though the nest and eggs are precisely similar." In conclusion we beg to state that we by no means wish positively to deny the occurrence of the true H. cahirica in Europe. On the contrary we believe it very possibly does occur within European limits; but at the same time all the so-called European specimens of H. cahirica that we have seen have been H. rustica in spring dress. W e shall be most glad to receive any authentic specimens of H. cahirica from any part of Europe, that we may be certain on the subject before including it in our ' Birds of Europe' 6. Descriptions of Forty-eight new Species of Shells. By G. B. SOWERBY, F.L.S. (Plates XXL, XXII.) CRASSATELLA SUBQUADRATA. C. testa oblongo-subquadrata, valde compressa, solida, pallide rube-scente, castaneo obscure radiata, ad umbones purpureo biradiata, intus albida, extus concentrice minute striata, liris angulatis ad angulum quadratis sculpta; latere postico longiu-sculo, obtuse angulato, post angulum complanato, margine dorsali recto, subdeclivi; latere antico breviusculo; margine dorsali utrinque concavo-complanato ; margine interno Icevi. Hab. Agulhas Bank, S. Africa. Mus. Taylor. CRASSATELLA FOVEOLATA. C. testa obliqua, crassa, tumida, rostrata, pallida, castaneo maculata, intus partim castanea, extus costellis validis rotundis subdistanti-bus medio tumidiusculis concentricis lirata, interstitiis profundis latere postico oblique producto, elevatim angulato, eleganter post angulum castaneo; umbonibus elevatis, prominentibus, acutis, margine dorsali utrinque declivi, excavato ; margine interno denticulato ; epidermide fusca. Hab. China Seas. Mus. Taylor. This shell resembles C. sulcata, but differs from it in being more pointedly beaked and more distantly and deeply grooved. All the ridges in this species follow the lines of growth ; but in C. sulcata they become excentric towards the margin. CRASSATELLA CREBRILIRATA. C. testa ponderosa, obliqua, subcompressa, pallide fulvescente, radiata, umbones versus rubescente, intus pallidissime rosacea; latere postico oblique producto, angulato, post angulum complanato, margine terminali oblique truncato; latere antico |
