OF THE LEYDEN MUSEUM. 199 



■stHyalaea depressa' d'Orbigny. 



Animals : 



N. Atlantic Ocean (Gulf of Biscay), June '06, rather common, Buitendijk. 

 '/ ( // ), Sept. '06, numerous, // 



// (Coast of Portugal), March '06, rather common, // 



Indian Ocean, April '06, 1 sp., // 



This form corresponds certainly to Cavolinia infle.va. 

 Contrary to Pelseneer (1888, p. 89) I regard » Cleodora 

 curvata" Souleyet as a young, somewhat more advanced 

 stage of Cavolinia infle.va, not of C. uncinata. This » Cleo- 

 dora' is represented in the collection of the Museum by 

 au empty shell from the South-Atlantic (Sowerby and Fulton, 

 purchased 1907). The very marked and regular curvature, 

 the great breadth of the aperture, and the comparative 

 shortness of the shell, clearly indicate a species in which 

 the posterior portion is strongly developed, and correspond, 

 in my opinion, exactly with the variety loncja of C. injiexa^ 

 in which the hinder portion of the shell is only somewhat 

 more inflated on the ventral side. Remarkable is the fact 

 that » Cleodora curvata'" has hitherto only been found in 

 the Atlantic. But this is exactly the region where C. in- 

 flexa var. longa lives. 



B. PSEUDOTHECOSOMATA. 



Family I. Cymbuliidab. 



Genus 1. Cymhulia Peron et Lesueur. 



Species 1. Cymhulia peroni de Blainville. 



Animals: 

 Mediterranean (Naples), February '04, 3 sp.. Dr. J. J. Tcsch. 



Some larvae, provided with shells and certainly belonging 

 to Cymhulia^ were caught: 



N. Atlantic Ocean (Gulf of Biscay), 1904, 1 sp., Buitendijk. 

 Mediterranean, June '04, 1 sp., // 



// May '05, 1 sp., // 



Notes from the Leyden Museum, "Vol. XXIX. 



