134 



DESCRIPTION OF NEW TASMANIAN SHELLS. 



Bt the Eev. J. E. Tenison Woods, F.L.S., RG.S, 



[Eead 8fh Novemler, 1875.] 



The following marine shells have been placed at my disposal 

 for description by Mr. W. Legrand, of Hobart Town, and the 

 Kev. H. D. Atkinson. Mx\ Legrand, who has one of the 

 finest collections of shells in the southern hemisphere, has 

 been a collector for years, and has become thoroughly familiar 

 with the marine fauna of our coast. Mr. Atkinson has occu- 

 pied himself with dredging for some years, and has been the 

 only conchologist who has sought for novelties in that way 

 in Tasmania. He has also been indefatigable in his efforts to 

 advance the success of conchology in the Island, and it is 

 owing to his efforts alone that some of tlie very interesting 

 species here described have been brought to light. I also 

 observed two new species from a small collection placed in my 

 hands by Mr. Justin Browne and the Curator of the Museum, 

 Mr. Roblin. To all these gentlemen I take this opportunity 

 to return my thanks. 



In this list the measurements are always the greatest 

 length, width, or height, as the case may be. In bivalves 

 length means in every case from the umbones to the margin ; 

 width the gi-eatest measurement in the opposite direction ; 

 and height the tliickness of both valves united. All dimen- 

 sions in French millimetres. 



PiSANiA TASMANiCA n. s. P. t. funiformi-eloncjata, alba, nitente, 

 llris transversalibits subtillissimis, plicisque minutis, rotundatis,subdis- 

 tantibus, creberrime cancellata; anfradibus 7, convexis, dcclivis, ad 

 suturam constrictis, varlcibus eburneis, sub-obsoletis, ornatis ; apertura, 

 ovali, lahro eburneo, incrassato ; labio vix calloso. Long. 20. Lat. 

 7. Aperlong. 7. 



P. shell fusiformly elongate, white, shining, very thickly 

 cancellate, with very fine transverse lirse and small rounded, 

 subdistant plaits ; whorls 7, convex, sloping, constricted at the 

 suture, ornamented with ivory white sub-obsolete varices ; 

 aperture ovate, outer lip ivory white, thickened ; inner lip 

 scarcely callous. 



Rare, D'Eutrecasteaus Channel. It was not without diffi- 

 culty that I separated this species from P. reticulata, which 

 it resembles in every respect, except that it is very much 

 smaller, shining white, with two or three regular varices on 

 each whorl. There are no varices in P. reticulata, and none 

 are noticed by A. Adams (Zool. Proc. 1854, p. ;|.38, sp. 39), 

 whose description is hardly sufficiently detailed. In old 

 specimens of that shell the cancellated structure causes the 

 plaits to be very granular, and it is a dull shell of a purple 



