BY C. HEDLEY. 737 



application to that institution, Mr. W. G. van Name most kindly 

 sent me an enlarged photograph of the type, here re-drawn 

 (Fig. 78), which suffices to establish the name as a synonym of 

 A. semigranosa. 



Nassa munieriana Crosse, was described from iSt. Vincent's 

 Gulf, 8. A. The type was presented by Mr. G. F. Angas to the 

 British Museum, where it is now labelled as a synonym of A. 

 seinigranosa. The figure suggests an abnormal, distorted shell, 

 which perhaps accounts for Watson's mistake in referring it to 

 N. jmuperata. 



The affinities of A. semigranosa are, as was recognised by 

 Dunker, Marrat, and Watson, with A, pauperata. Both share a 

 smooth space beliind the aperture, a subsutural bead-row, and 

 absence of denticles in the aperture; but A. pauperata is pro- 

 portionately broader, absolutely larger, more solid, and generally 

 more highly coloured. For most of their range, the two co-exist, 

 but A. semigranosa perhaps extends further east, and A. paupei'- 

 ata further west. 



A closer relation is Arcularia tasmanica Ten. -Woods,* which 

 its author thought might intergrade with semigranosa, but which 

 I have not yet found to do so. Tenison-Woods' type of the 

 small, sturdy, southern species is preserved in the Tasmanian 

 Museum, Hobart.f Typically, A. tasmanica is shorter, more 

 solid, and more closely ribbed than A. semigranosa, is strongly 

 sculptured on the back of the last whorl, where A. semigranosa 

 is, as its name implies, smooth, and finally has several teeth in 

 the aperture, while A. semigranosa is edentulous. As A. tas- 

 manica has not been illustrated, a figure of it is here offered 

 (Fig.81). 



When Angasj recorded Nassa lirella from S. Australia, he 

 appears to have had A. tasmanica before him. The Cumingian 

 specimens of N. lirella, probably Jieeve's types, which I examined 

 in London, are distinct, being larger and proportionately broader 

 than A. tasmanica; further, they are marked "Japan."' 



* Ten. -Woods, Pioc. Roy. Soc. Tasm., 1875(1876), p. 150 



tMay, Pioc. Roy. Soc. Tasin., 1902(1903), p.l08 



t Augas, Proc. Zool. fSoc, 1880, p. 415. 



