OF NEW SOUTH WALES. 91 



is named B. Tasmanicus* Ifc is a good deal different in shape 

 from B. Dufresnii, but we have seen that such a feature is not of 

 value. It would be interesting to keep some of the live in- 

 dividuals for some time, and see if the different species would 

 breed together. 



The egg of the B. Dufresnii calls for no particular remark, 

 except for its size, which is disproportionately large to the animal 

 which brings it forth. Just before breaking forth, the shell is 

 very thin, amber colored, and almost developed into the form 

 figured in the plate fig. 1 b. The shell as well as the egg is so 

 exceedingly brittle that even an alteration of the temperature is 

 sufficient to break it, and no doubt it is in this manner that the 

 imprisoned animal escapes from its enclosure. 



In conclusion, I must express my great obligations to Mr. 

 W. Legrand, of Hobart, author of " Monograph of Tasmanian 

 Land Shells. f'^ He placed his very extensive collections entirety 

 at my disposal for descriptions, and I need scarcely say such a 

 number of varieties could be got together by no ordinary observer. 

 I have also to thank Dr. J. C. Cox, for the use of his collection. 



EXPLANATION OF PLATE 7. 



Fig. 1 a. — Egg oi Bulimus Dufresnii. 



Fig. 1 b. — Shell just emerged from the egg. 



Fig. 2 a.b.c. — Specimens from St. Leonards, Launceston. 



* It is much thinner than B. Dufresnii, more acute and only found near the coast. I 

 have very little doubt that it is identical with B. Eingii, Gray, of Western Australia, which 

 has the following synonomy according to Dr. Cox. Helix trilineata, Q. and G., and 

 Ferussac, and Deshayes ; B. trilineatus. Reeve; B. Sayi, Pfr. Proc. Zool. Soc, 1846, 

 p. 114 ; B. melo, Var. B. Menke Moll. Nov. Holl., p. 7. The species is found in Western 

 Australia, but no doubt has intermediate stations. 



t Printed and published by the author, 1871 ; and I regret to add, the first edition was 

 small and is now out of print. Copies are exceedingly scarce. 



