MOLLUSCA. 



VI.-PTEEOPODA. 



By Sir C. Eliot, K.C.M.G., LL.D. 



(2 Plates.) 

 The Pteropods collected by the ' Discovery ' comprise the following species : — 



Name. 



Quantity. 



Locality. 



1. Limacina antarctica, Woodward 



2. Limacina retroversa * (Fleming) 



3. Clio sulcata (Pfeifer) . 



4. Glione antarctica, E. A. Smith 



5. Spongiolranchaea australis, D'Orb. 



Numerous 

 Moderately abundant 



Two specimens and 

 some fragments 



Numerous 



Five specimens 



Winter Quarters, and the region about 

 Lat. 61°, Long. 140° E. 



From Long. 95° 43' W. to Long. 173° 33' 

 E., and from Lat. 55° to Lat. 61° S. 

 None from Winter Quarters. 



Lat. 63° 04' S., Long. 175° 43' S. 



Winter Quarters. 



Winter Quarters, and Lat. 55° 31' S., 

 Long. 156° 19' E. 



Winter Quarters were in Lat. 77° 49' S., Long. 167° 7' 4" E. 

 * Some naturalists might regard the forms here called Limacina retroversa as at least two distinct species. 



Though L. antarctica and CI. antarctica are represented by numerous specimens, 

 and clearly are enormously more abundant than the other species, the quantities 

 contained in each tube suggest that they do not occur in such great shoals as the 

 northern forms. 



I received the specimens in two consignments, described respectively as Pteropods 

 and Pteropods from the Plankton. The former, it would seem, were taken out of 

 holes cut in the ice ; the latter in the open sea. In most of the tubes the Pteropods 

 are mixed up with other forms, such as small crustaceans, larvae of Lamellariidae, and 

 a globular gelatinous mollusc (probably Lamellaria mollis, E. A. Smith). In the 

 majority of specimens the soft parts are well preserved, but the fragile shells are not 

 only broken, but partly dissolved by the fluid in which the animal has been killed 

 or kept. The number of perfect shells in the collection is small. 



In the above table I have entered Limacina antarctica and Clione antarctica as 



C 2 



