OCR Text |
Show 272 MR. E. A. SMITH ON THE MOLLUSCA [May 6, 4. SUCCINEA HUMEROSA, Gould. 5. SUCCINEA PAPILLATA, Gould. 6. SUCCINEA (TRUELLA) INFUNDIBULIFORMIS, Gould. 7. MELANIA LANCEA, Lea. The specimens from Lake Waihiria which I regard as belonging to this species have only four or five whorls remaining, which are regularly spirally striate throughout, whilst in the type figured by Reeve (Conch. Icon. fig. 39) eight volutions remain, and the striae upon the last four are wanting at the upper part. 8. PHYSA, sp. A small ordinary form. AUSTRALIA. Examples of nine land and freshwater Mollusks were brought home from Continental Australia, namely:-Helix bipartita (Ferussac), from Somerset, Cape York, Parmacochlea fischeri, also from Cape York, Neritina souverbiana from Flinder's Passage, and the rest from Sydney. These are Helicarion robustus, Triboniophorus graeffei, Limax flavus, Ophiocardelus australis (Q. & G.), Melania balon-nensis (Conrad), and Corbicula minor (Prime). Among these it is worthy of remark that one, Limax flavus, is a European species, and another, Parmacochlea fischeri, forms a very remarkable new genus. I herewith append a few notes upon the new and most interesting forms. LIMAX FLAVUS, Linn. Hab. Sydney. A single specimen, only three quarters of an inch in length, was presented to the officers of the ' Challenger' by Dr. Cox of Sydney. In the British Museum there are two others, an inch and three quarters long, which also came from the same locality. After a very careful comparison with British examples, I am unable to detect any differences, and therefore conclude that this species has been introduced into Australia probably along with European plants, HELICARION ROBUSTUM, Gould. Hab. Near Sydney, New South Wales. There are two specimens which agree perfectly with Gould's description and figure of this species, but I may add that the correct identification of certain closely allied forms is almost impossible without the comparison of actual types. Such forms are H. freycineti, Ferussac, H. cuvierii, Ferussac, Vitrina verreauxi, V. V. strangei, V. leucospira, all of Pfeiffer, V. mastersi, Cox, and inflata, Reeve. The animals of the two shells under examination correspond very closely with Ferussac's figures (Hist. Nat. Moll., Atlas, vol. i. pi. 9 A. f. 1-4). The sole and side-margins of the foot are buff-colour, the |