OF NEW SOUTH WALES. 65 



plana, Quoy. ; B. lutea, Quoy. ; B. Bruni, Crosse ; E. lutea, 

 Pliilippi, Adams ; B. vittata, Philippi ; B. imbricata, Gray, Phil., 

 Adams ; Bembicium nanum, Philippi ; B. pidum, ditto ; Littorina 

 Australis, Gray ; Trochus cicatricosus, Jonas. 



In addition to the above named Littorina we have the following 

 cited by various authors as occurring in Australia and Tasmania : 

 L, mauritiana, Reeve ; L. unifasciata, Gray, Appendix 1. 2 vol. 

 of King's Yoy. in Australia, p. 483 ; L. paludinella, Reeve, Icon, 

 pi. 16, fig. 84 ; L. Hisseyana, mihi, Proc. Roy. Soc, Tas., 1875 ; 

 L. Philippi, Carpenter, Cat. Magallan Shells, p. 349 ; L. ziczac, 

 Chemnitz, t. 5, p. 69, pi. 166, f. 1,600; L. diemanensis, Quoy. 

 and Gaimard, Voy. de I'Astrol., t. 2, p. 479, pi, 33, f. 8-11; 

 L. pyramidal is, Quoy. and Gaim., loc. cit. 6, p. 482, pi. 3, f. 12-15 ; 

 L. undulata. Gray, loc. cit. ; L. Australis, Gray in King, loc. cit. 



Some of these shells call for no remark, as they are either doubtful 

 Liitorince, or too little is known about them. Littorina mauritiana 

 is, however, one about which there is much to be said. It is a 

 rather elongated turbinated shell, with rounded whorls, the last 

 nearly as long as all the others combined. It is generally of a 

 bluish color, but ranges from pale blue to the faintest bluish 

 white. It is also sometimes spirally banded with faint blue or 

 white lines, or it is longitudinally striated with zig-zag lines of 

 dull green, or reddish lines. At the base of the last whorl there 

 is a very obtuse angle, scarcely perceptible in some shells — very 

 visible in others. Some of the shells are globose, with a very 

 short and acute spire, while the last whorl is immensely dispro- 

 portioned to the rest. This variety has often the zig-zag dull 

 green lines. The shell varies in size from 5 mil. to 25 in height. 

 The small sizes are young, and of a smalt blue. All these varieties 

 may be obtained from the same patch of rock. It is common 

 everywhere on rocks above high water mark. I have found no 

 difference in its characteristics in Guichen Bay (S. A.), Port 

 Jackson, and the extreme south of Tasmania. Perhaps the 

 South Tasmanian specimens are a little smaller. 



I cannot see any specific difference between this shell and 

 L. Africana Philippi, and considering that our common shell is 

 identified with the one that occurs at the Mauritius, it is easy to 



