OF THE LEYDEN MUSEUM. 183 



]led Sea, Septemb. '04, some sp.. Buitendijk. 



// January '05, // // 



// May '05, ratlier common, // 



// January '06, // // 



// April '06, /, ,/ 



'/ August '06, many sp., // 



// Novemb. '06, // // 



// March '07, // // 



Malacca-street, August '06, // ,i 



II Novemb. '06, some sp., // 



Java-Sea, Aug.-Sept. '06, // // 



// Decemb. '06, // // 



Empty shells : 

 Mediterranean (Pantellaria, 390 fathoms), purchased 1906, H. B. Preston. 



Some specimens have the outer lip of the aperture 

 strengthened by a lateral rib, which causes this lip being 

 protracted into a point. At the base of the rib (more or 

 less distinct) and rectangular to it, a similar one is situated, 

 parallel to the outer margin of the aperture. A brown 

 spot on the beginning of the last whorl, just near the 

 inner lip, is very often found, without, however, being in- 

 variably combined to the occurrence of the above-noted ribs. 



Species 3. Limacina lesueuri (d'Orbigny). 

 (PI. 7, Figs. 1—3). 

 Empty shells : 

 N. Atlantic Ocean, purchased 1907, 24 sp., Sowerby & Fulton. 



A number of dead shells of this rather rare species was 

 purchased from Messrs. Sowerby and Fulton, unfortunately 

 without indication of exact locality. As they differ in some 

 respects from former descriptions, I have figured once more 

 the different aspects of the shell in various positions (PI. 7, 

 figs. 1 — 3). From these it may be inferred, that the spire 

 is depressed (though, according to Locard '), there seems 

 to be some variation in its height), with 5 whorls, that 

 the umbilicus is very broad, that the columellar margin 

 of the inner lip is very thin and straight, quite as Boas 



1) p. 23. 



Notes from the Leyden ÜMuseuiii, Vol. XXIXi. 



