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Show 596 MR. G. F. ANGAS ON THE TERRESTRIAL [DeC 4, BULIMUS NICHOLLSI, A. D. Brown, MSS. The discovery of this species is due to the researches of Dr. A. D. Brown, of New Jersey, U.S.A., who named it in manuscript after our mutual friend Dr. H. A. Nicholls of Dominica. As, however, he has not given a description of it, I now do so, retaining his manuscript name. It is the largest land-shell hitherto discovered in Dominica, measuring 1 inch 3 lines in length. It occurs on the path from Roseau to Rosalie at an altitude of about 2000 feet. It bears a strong resemblance to some species of the genus Partula, especially in the expansion and partial thickening of the outer lip. It is an arboreal species. Shell rimately perforated, elongately ovate, rather solid, dark olive-brown, finely irrregularly longitudinally striated, crossed here and there by very thin concentric lines breaking the longitudinal sculpture, especially on the upper whorls ; spire elevately conical; sutures impressed ; whorls 6-7, flatly convex ; aperture ovate ; outer lip slightly expanded and thickened, paler in colour than the rest of the shell ; columella triangular, a little thickened and flattened inwards towards the base. Diam. 7, alt. 10 lines. Hab. Island of Dominica, W . I. BULIMUS (LEPTOMERUS) LILIACEUS, Guilding, MSS. This pretty species was first met with in the island of St. Vincent by the late Mr. Guilding, who gave it the above MS. name. It was afterwards described and figured by Reeve in the ' Conchologia Iconica.' It is rare in Dominica, on trees in the forests at an altitude of 2000 ft. It may be at once distinguished by its uniform pale primrose-colour. BULIMUS (LEPTOMERUS) MULTIFASCIATUS, Lam. On trees at an altitude of about 2000 ft., very rare. BULIMUS (LEPTOMERUS) EXILIS, Gmelin. This species is very abundant on the lower slopes down to the sea-level. There are at least three well-marked varieties of the shell, viz:- a. Entirely of a pale fulvous colour. b. With a narrow black band encircling each whorl. c. With the base of the last whorl black, and with several broader bands of the same colour surrounding the whorls. The shells also vary considerably in their proportions as regards length and breadth. The species is terrestrial in its habits. HELIX (DENTELLARIA) DENTIENS, Fer. ^ This is one of the commonest species of Helix in the island, occurring plentifully in various places from 600 or 800 ft. to the sea-level. Under dead logs, loose stones, and decayed leaves. HELIX (DENTELLARIA) BADIA, Fer. This species, which is smaller than H. dentiens, is extremely |
