MONOGRAPH OF THE ATLANTIDAE. 



17 



Poeloe Weh, March 25, '07, 



Malacca-street, January '06, 



Java-Sea, May '06, 



„ December '06, 



For description and figures I refer to my monograph 

 (p. 54, PI. VII, figs. 11 — 13); I have only given here a drawing 

 of the shell seen from above. The features, distinguishing 

 this species from A. peroni and allied forms, are supplied 

 by the keel, not (or scarcely) penetrating between the 

 inner lip and the penultimate whorl, by the smaller spire 

 (the shell nearly wholly consisting of the last whorl), the 

 suture being always tinted with a reddish-brown colour, 

 which becomes most clear at the base of the keel, and 

 finally by the radula (very powerful in this species, as 

 I counted more than 100 transverse rows), in which the 

 intermediate plate is not provided with a small tooth at 

 the lateral side. Shell colourless (with exception of the 

 suture), without sculpture, only with a few' indistinct 

 lines of growth. 



2 sp., 



4 sp., 



2 sp., 



2 sp., 



Buitendijk. 



M 

 tl 



Species 5. Atlanta lesueuri Souleyet. 



1852. Atlanta lesueuri Souleyet. 



1852. Atlanta primitia? Gould. 



1852. Atlanta cunicula Gould. 



1906. Atlanta oligogyra Tesch. 



(Plates 1 and 2, figs. 11 and 12). 

 Dry shells: 



W. Pacific Ocean, purchased 1907, 16 sp., Sowerby and Fulton. 

 Animals : 



Red Sea, September '04, 1 sp., Buitendijk, 



„ April '06, 1 sp., 



May '06, 1 sp., „ 



„ November '06, 1 sp., „ 



Gulf of Aden, December '05, 14 sp., „ 



Notes from the Loyden Museum, Vol. XXX. 



2 



