MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 109 



Section Azygobranchiata. 



Family Cyclostrematidse. 



* Cyclostretna calypso, sp. n. 



* „ coatsianum, sp. n. 



Sub-order monotocardia. 

 Section (a) Ptenoglossa. 



Family lanthmidee. 

 lanthina exigua, Lamarck. 



Family Scalidse. 



* Scala magellanica, Phil. 



Section (6) Taenioglossa. 



Family Naticidw. 



* Natica impervia, Phil. 



,, {Lunatia), sp. juv. 



Family Trichotropidas. 



* Trichotropis antarctica, sp. n. 



Family Capulidse. 



* Calyptrsea chinensis, L. 



,, costellata, Phil. 



,, dilatata, Lamk. 



Family Littorinidse. 

 Littorina (Lmvilitorina) caliginosa (Gould). 

 „ ,, coriacea, M. and St. 



,, {Pellilitorina) pellita, v. Marts. 

 „ ,, setosa. Smith. 



* Lacuna ahyssicola, sp. n. 



(ROY. SOC. BDIN. TRANS., VOL. XLVIII., 335.) 



