MARINE MOLLUSC A OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 113 



Sub-order MYTILACEA. 



Family Mytilidse. 

 Mytilus edulis, Linn. 



,, magellanicus, Chemnitz. 

 ,, ovalis, Lamarck. 

 Philobrya meridionalis (Smith). 

 ,, quadrata (Pfeifer). 

 sublfevis, Pelseneer. 

 ,, wandelensis, E. Lamy. 



* Crenella decussata (Mont.). 

 Modiolarca mesembrina, M. and St. 



Order PSEUDOLAMELLIBRANCHIATA. 



Family Pectenidse. 

 Pecten colbecki, Smith. 



multicolor, M. and St. 



? patagonicus, King. 



,, pteriola, M. and St. 

 Amussium IS-liratum, M. and St. 



Family Limidse. 

 Lima goughensis, M. and St. 

 (Limatula) pygmsea, Philippi. 



Order EPLAMELLIBRANCHIATA. 

 Sub-order SUBMYTILACEA. 



Family Carditidse. 



* Cardita congelascens, sp. n. 



pallida, Smith, var. 1%-costata nov. 



Family Astartidae. 



* Astarte magellanica, Smith. 



Family Lucinidse. 



* Diplodonta lamellata, Smith. 

 Cryptodon falklandicus, Smith. 

 Cyamium antarcticum, Philippi. 



,, denticulatum, Smith. 

 falklandicum, M. and St. 



Family Erycinidte. 

 Lassea consanguinea (Smith). 

 Kellyia cycladiformis, Desh. 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 339.) 



