317 



NOTE ON THE IDENTITY OF TORINIA DENSEGRANOSA, 

 PILSBRY, AND T. ENOSHIMENSIS, MELVILL. 



By James Cosmo Melvill, M.A., D.Sc. 



Read Uth March, 1913. 



I HAVE lately received specimens of 'T. den&egranosa, Pilsbry, 1905, 

 and am satisfied it is only the adult state of the smaller Enoshimensis 

 described by me fourteen years earlier, in October, 1891. I am 

 confirmed in this view by Mr. Edgar Smith, who with me also 

 compared the types of the latter witJi denseffranosa at the British 

 Museum (Natural History) a few months ago. I repeat my original 

 description. 



Solarium {Torinia) Enoshimense, sp. nov. 



"S. testa depresso-discoidea, solida, profunde umbilicata, fusco- 

 castanea, anfractibus quatuor, spiraliter sulcatis, papillis monili- 

 formibus, regulariter transversim decoratis, apud suturas depressis, 

 ultimo anfractu rapide accrescente, ad peripheriam tribus costis 

 crenulato-carinatis, ad umbilicum pulchre crenulato, apertura circu- 

 lari, labro simplice. Long. : 2'50rara. speciei majoris. Lat. : 5 mm. 



'■'■Hah. — Enoshima, Japonia. 



" Shell flattened, pale-brown chestnut, moderately and deeply 

 urabilicate, whorls four, tlie last very rapidly increasing, witli spiral 

 channels of unequal breadth covering the whole surface, and forming 

 regular rows of raoniliform papillae. At the periphery these spiral 

 channels have a very boldly defined semblance of angularity ; the 

 concentric spaces below the sutures are double the width of the tliree 

 intervening spaces between them and the periphery. At the base, 

 the crenulations round the umbilicus are boldly defined, and the 

 next concentric space is twice the breadth of those, in their turn, 

 intervening between this and the angle of the periphery, four in all. 



" Of this small species, obtained in a native box of Japanese shells 

 forwarded direct, and which contained several novelties, I have two 

 specimens precisely similar, and in one of the drawers of the National 

 Collection at the Natural History Museum, South Kensington, have 

 found two or three others, unnamed, labelled ' From Japan '." 



There is really nothing to add to this description, but I may utter 

 a word of apology for the somewhat crudely drawn magnified original 

 figure. Reference to this is given below. 



The synonymy will therefore be as follows : — 



Heliacos Enoshimensis (Melvill). 



Solarium {Torinia) E7ioshi)nense, Melv., Journ. Conch., vol. x, p. 411, 



pi. ii, fig. 12 (October, 1891). 

 Torinia denseyranosa, Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, 



p. 106, tig. (1905). 



