OF THE LEYDEN MUSEUM. 191 



Empty shells: 

 Mediterranean, date?, 2 sp., Cantraine. 



Genus 3. Styliola Lesueur. 

 Species 1. Styliola subiila (Quoy et Gaimard). 



Animals : 



Mediterranean, date?, 10 sp., Cantraine. 



// date?, 5 sp., Buitendijk. 



// May '05, 4 sp., // 



II December '05, 6 sp., // 



Empty shells : 

 Mediterranean (Sicily), date?, 4 sp., Cantraine. 



The specimens, caught by Mr. Buitendijk, were nearly 

 all young ones. 



Genus 4. Clio Linné. 



Species 1. Clio halantium (Rang). 



Empty shell : 

 S. Atlantic Ocean, purchased 1907, 1 sp., Sowerby & Fulton. 



This beautiful, large species which is easily to be distin- 

 guished by its flattened shape, its three dorsal longitudinal 

 ribs and its marked transverse ridges, is certainly not the 

 young stage of Clio cuspidata (Bosc), as Schiemeuz believes 

 (p. 16), as it grows to a much larger size, without ever 

 assuming the characteristic features of the latter species. 



The only specimen in the Museum has the posterior 

 portion of the shell broken off; the straight part, which 

 only exists, has a length of 22 mm. 



Species 2. Clio australis (d'Orbigny). 

 (PI. 7, Figs. 8—10). 



Empty shells: 

 Australia, purchased 1907, 2 sp., Sowerby & Eulton. 



Notes irom the Leyden JVEuseum, Vol. XXIX. 



