OF THE LEYDEN MUSEUM. 189 



Indian Ocean, May '05, many sp., Buitendijk. 



// January '06, some sp., 



// April '06, rather common, 



// August '06, some sp., 



// ■ Novemb. '06, // 



// March '07, many sp., 



// July '07, // 



// (Gulf of Bengal), August '06, some sp., 



// (Gulf of Aden), üecemb. '05, // 



// ( // ), August '06, // 



Red Sea, May '05, some sp., 



// January '06, rather common, 



// April '06, // 



// August '06, many sp., 



// Novemb. '06, some sp., 



// !Marchl6, '07, many sp., 



Malacca-street, January '06, some sp., 



// Novemb. '06, // 



Java-Sea, Decemb. '06, many sp., 



// August '07, // 



Most specimens belong to the very short, straight form 

 C. clava Rang, which I believe to belong within the virgula- 

 group. Only at a few places occurred the typical C. virgula 

 with its markedly pronounced curvature. This form seems 

 to grow to a rather large size, as it attains a length 

 of 6 mm. Notwithstanding Schiemenz' recent assertions 

 (p. 13) I cannot regard C. conica (Eschscholtz), which was 

 maintained by Pelseneer, as a distinct species. It was found 

 at many stations, especially in the Mediterranean and the 

 Red Sea, but always mixed with clava and virgula, and 

 indeed I have not been able to discover a single feature, 

 which may decidedly separate C. conica. Formerly (p. 26) 

 I exposed my views on this subject, agreeing nearly in this 

 respect with Meisenheimer (p. 16). 



Species 2. Creseis acicula Rang. 



Animals : 



Mediterranean, date?, rather common. Buitendijk. 



tl (Sicily), dateP, many sp., Cantraine. 



// June '04, some sp., Buitendijk. 



Notes from the Leyden ]Museum. Vol. XXIX. 



