MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 1 O'J 



Section Azygobranchiata. 



Family Cyclostrematidse. 

 ' Oyclostrema calypso, sp. n. 



,, coatsianum, sp. n. 



,, gaudens, sp. n. 



,, meridionale, sp. n. 



Family Trochidse. 



' f Calliostoma modestulum, Strebel. 

 Photinula expansa (Sowb.). 

 taeniata, Wood. 

 violacea, King. 

 Valvatella antarctica (E. Lamy). 



Sub-order MONOTOCARDIA. 

 Section () Ptenoglossa. 



Family lanthinidse. 



lanthina exigua, Lamarck. 



Family Scalidas. 



* Scala magellanica, Phil. 



Section (1) Tsenioglossa. 



Family Naticidse. 



* Natica impervia, Phil. 



,, (Lunatia), sp. juv. 



Family Trichotropidie. 

 Trichotropis antarctica, sp. n. 



Family Cwpulidse. 

 ' Calyptrwa chinensis, L. 



,, costellata, Phil. 

 ,, dilatata, Lamk. 



Family Littorinidse. 



Littorina (Lsevilitorina) caliginosa (Gould). 

 ,, ,, coriacea, M. and St. 



,, (Pettilitorina) pellita, v. Marts. 

 ,, ,, setosa, Smith. 



: Lacuna abyssicola, sp. n. 



(HOY. soc. EDIN. TRANS., VOL. XLVIII., 335.) 



