254 the proceedings of the linnean society 



Amnicola badia. 



T. rninuta elongata, ovata, turrita, badia, spira acuta, apic 

 erosa; anfr. 5, convexiusculis, ultimo vix angulato, sutura impressa, 

 apertura ovata, peristomate continuo, obtuso, fusco. Long. \, lat. 

 fa, poll. Hab. Banks' Peninsula, New Zealand. 



A small elongated species, like A. Preissii of N. Holland. Its 

 color and its dark obtuse peristome give rather a marked 

 character to a shell so small and simple. 



[Appears to resemble the minute genus so common in the 

 freshwater lakes and streams of Australia and Tasmania, and 

 which is variously named Paludestrina, Bythinia, Hydrobia, Byth- 

 inella, and Amnicola. I am of opinion that this shell has been 

 redescribed in the Zoological Proceedings as Paludestrma saleana 

 by M.Fischer. J. E. T.W.] 



Amnicola egena. 



T. minuta, tenuis, subperforata, elongato-turrita, epidermide vire- 

 scente induta ; spira acuta ; anfr. 5, convexis, sutura profunda, 

 apertura ovata, peristomate continuo, labro acuto, patente. 

 Long, i, lat. fa, poll. Hab. Banks' Peninsula, New Zealand. 



More slender and less solid than A. badia, and of an entirely 

 different color. It is very much like Paludina acuta of Europe. 



(Vol. 3, loc. cit. p. 90.) — Trochus sirius. 



T. parva, imperforata, pyramidata, dilute beryllnia, leviter cor- 

 rugata ; spira anfr. 4, conicis, infra oblique plicatis, ad periphe- 

 riam acutis et spinis compressis ad 18, armatis ; basi planulata, 

 stellaris, liris concentricis muricatis ad 5 insculptis; regione collum- 

 ellari arcuata, levigata, labro peroblique. Diam. \, axis -5^-, poll. 

 nab. N. Holland. 



The multitude and regularity of the triangular projections of 

 the periphery when viewed from below give the base a beautiful 

 star-like form, much like T. stellaris. 



[This is only a young form of Garinidea squamlfera, which has 

 the projections at the periphery, though it loses them in the 

 adult state. The operculum is completed very early. J. E.T.W.] 



