8d 



On Some Australian Species of 



EULIMID-^E AND PYRAMIDELLID^E. 

 By Professor R. Tate. 



[Read August 2, 1898.] 



Plate IV, Figures 1-7. 



FAMILY EULIMID^. 



Genus Eulma. 



(a). Shell straight. 



1. E. augur, Angas, Proc. Zool. Soc, 1865, p. 56; Reeve, Icon. Conch., 

 t. f., 1866 ; Try on, Man. Conch., vol. viii., p. 269, t. 68, f. 10, 1886. 



Synonym, B. proxima, Sowerby in Reeve's Icon. Conch., t. 6, 

 f. 48, 1866 ; Tryon, op. cit., t. 68, f. 11. 



I have compared the types of B. at^gur and E. proxima in the 

 British Museum, and the only differences between them 

 {E. proxima is slightly immature) are those of total length, the 

 former having 10 whorls in a length of 12 m.m., and the latter 

 12 whorls in a length of 15 m.m., and a slight difference in the 

 proportion of the length to the breadth. An examination of 

 many examples of E. augur proves that the proportion of length 

 to breadth is not constant, and that micromorphs occur ; indeed 

 there is a great tendency among Eulimidse to range from giant 

 to d warf -sizes ; thus two extremes give the following ratio, 

 100 to 36 and 100 to 28 vix. 



Tryon's figure of E. augur grossly misrepresents its shape, 

 some individuals may show a barely perceptible torsion of the 

 spire, but in general, Angas' diagnosis " marginibus spirae 

 rectioribus " is applicable. 



Distribution. — For E. augur. South Australia (without 

 locality), Angas, type specimen; Holdfast, Aldinga, and Fowler's 

 Bays, Wauraultie and Wallaroo, Spencer Gulf, Tate, ; Royston 

 Head (Matthews ! ) 



Tasmania (coll. Dr. Yerco ! ) 



For E. proxima. New South Wales, Port Jackson (type). 

 The record for Tasmania of E. proxima by Tenison- Woods is 

 based on an erroneous determination, the shell so-named is 

 Rissoina spirata. 



2. E. orthopleura, sp. nov, PI. iv., fig. l. 



Pyramidal, straight, opaque-white, shining ; whorls, nine, flat ; 

 last whorl subangular at the periphery, aperture rhomboidal. 



Length, 6-25 ; width, 2-25. 



