OF THR LEYDEN MUSEUM. 193 



Red Sea, May '05, rather common. Buitendijk. 



// January 'OG, some sp., // 



// April '06, // // 



Empty shells: 



Mediterranean (Sicily), date?, 7 sp., Cantraine. 

 ? date?, 6 sp., ? 



Two varieties of this common and widely distributed 

 species are present; the first: angusta Boas seeming to oc- 

 cur chiefly in temperate waters, the second: lata Boas 

 confined to tropical and subtropical regions, though also 

 living in tiie Mediterranean, from where no angusta is 

 recorded, as far as is known to me. These varieties are, 

 however, linked together by intermediate forms, nor can 

 any great importance be attached to the distribution (which, 

 according to Boas, is somewhat different from the one, in- 

 dicated above), as f. i. the Siboga-expedition found both 

 varieties in the Molucca Sea. 



Species 4. Clio cuspidata (Bosc). 



Animals: 



Mediterranean, date?, ±10 sp , Cantraine. 



n (Sicily), date?, li sp., n 



Empty shells: 



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



Species 5. Clio sp. (juv.). 

 (PI. 7, Figs. 11-13). 

 Animals: 

 Atlantic Ocean (Gulf of Biscay), 1901', 1 sp.. Buitendijk. 

 Indian Ocean, July '07, 2 sp., // 



Shell minute (length 1,5 mm.), straight, transparent, 

 quite colourless, surface transversely striated ; aperture rather 

 wide, dorsal margin (fig. 13) more convex than the ventral 

 one, both without ribs ; lateral sides flattened over almost 



Notes from the Leyden IMuseum, "Vol. XXIX. 



13 



