MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 109 



Section Azygobranchiata. 



Family Cyclostrematidse. 



* Cyclostrema calypso, sp. n. 



,, coatsianum, sp. n. 



,, gaudens, sp. n. 



meridionale, sp. n. 



Family Trochidie. 



* Calliostoma modestulum, Strebel. 

 Photinula expansa (Sowb.). 



tseniata, Wood. 

 ,, violacea, King. 

 Valvatella antarctica (E. Lamy). 



Sub-order MONOTOCARDIA. 

 Section (a) Ptenoglossa. 



Family lanihinidse. 

 lanthina exigua, Lamarck. 



Family Scalidas. 



* Scala magellanica, Phil. 



Section (6) Taenioglossa. 



Family Naticidse. 



* Natica impervia, Phil. 



,, (Lunatia), sp. juv. 



Family Trichotropidae. 



* Trichotropis antarctica, sp. n. 



Family Capulidae. 



* Calyptrsea chinensis, L. 



,, costellata, Phil. 

 ,, dilatata, Lamk. 



Family Littorinidse. 



Littorina (Lsevilitorina) caliginosa (Gould). 

 ,, coriacea, M. and St. 



(Pellilitonna) pellita, v. Marts. 

 ,, setosa, Smith. 



* Lacuna abyssicola, sp. n. 



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



