| OCR Text |
Show 1880.] LAND-SHELLS OF MENTON. 117 variably more depressed, of stouter texture than the preceding, less brilliantly coloured, more often distinctly rimate than imperforate; apex acute, but less prominent; whorls distinctly less convex, the last one less expanded, less deflected at the aperture, with the periphery subangulately compressed, and base much less convex; aperture smaller in proportion, outer margin more equally rounded, the columella a good deal more oblique, with a conspicuous absence of the subangulation at its termination, and without the slight twist (or contortion) invariably found both in living specimens and in my subvar. primitiva ; collumellar callosity less developed. Alt. 12}, diam. 20 millim. Type var., Indian Museum, Calcutta ; also in coll. M M . Bourguignat, Coombe Williams, and Joly. Measurements from Pfeiffer (Mon. i. p. 284) :~-Diam. maj. 23, min. 19, alt. 12 millim. HELIX (FRUTICICOLA) CEMENELEA, Risso. (= H. galloprovincialis, Dupuy, 1848, not of Matheron, 842; = H. cantiana auct., nee Montagu.) I cannot agree with Dr. Kobel and the Marquise Paulucci, who, in her excellent and most useful catalogue, unites this and the form called H. anconce by Issel as var. of //. cantiana. I consider them quite distinct. At Menton the latter is found from the neighbourhood of the sea up to an altitude of at least 1500 feet; at 2500 feet to 4000 II. cemenelea takes its place, and, though varying a great deal, always preserves its distinctive " facies " ! I have just been examining living typical English H. cantiana, Mont., and find both shell and animal quite different! I have identified both this and the following, on the strength of M . Bourguignat's information. I had previously separated them as quite distinct, taking this to bell. rubella, Risso, and the next to be II. cemenelea. Alt. Ilf, diam. 18 millim. " Berceau," at 3000 feet. Alt. 10, diam. 14} millim. " Grand Mont." HELIX (FRUTICICOLA) ANCONCE, Issel, Append. Moll. Pisa, 1872. A species differing still more widely from H. cantiana, Mont.; to me, nearer H. carthusiana, Miiller. It appears to be a common littoral form in Liguria; I found it at Monaco, Menton, Alassio, &c. I cannot consider it identical with the preceding; even if it were to prove specifically so, it must still be regarded as a very distinct and constant variety. The animal is of a light and bright carnation-orange colour, with small and indistinct furrows, tentacles of a dull vinous shade, sole of foot yellow; seen through the shell the animal has a deep vinous appearance, mottled with yellow ; axis of spire less central ; whorls less elevated, more rapidly increasing, less convex; substance a good deal thicker, peristome much more coloured; umbilicus considerably less open; aperture more produced ; columella more oblique &c. Alt. 11}, diam. 16-| millim.; another-alt. 9, diam. 15} millim. |
