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 strise 

 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 Ilelicarion rohuntus, Triboniophorus graeffei, 

 Limax Jlavus, Ophiocardelus australis (Q. & G.), Melania balon- 

 nensis (Conrad), and Corbicula minor (Prime). Among these it is 

 worthy of remark that one, Limax Jiavus, 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 intro- 

 duced into Australia probably along with European plants. 



Helicarion robustum, Gould. 



Uab. Near Sydney, New South "Wales. 



There are two specimens which agree perfectly with Gould's de- 

 scription 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.frey- 

 cineti, Ferussac, U. cuvierii, Ferussac, Vitrina verreauxi, V. virens, 

 V. strangei, V. leucospira, all of Pfeiffer, V. mastersi. Cox, and V. 

 infiata. Reeve. 



The animals of the two shells under examination correspond very 

 closely with Ferussac's fisures (Hist. Nat. Moll., Atlas, vol. i. j)l. 9 a. 

 f. 1-4). The sole and side-margins of the foot are buff-colour, the 



