61 



MOLLUSCA. 



\. 



PART I. -GASTROPOD A PROSOBRANCHIA, SCAPHOPODA, 



AND PELECYPODA. 



BY EDGAR A. SMITH, I.S.O., 



Lately Assistant KI'I'IHT nf Zaolnf/i/, Jii-ilixli Mum'iuii (Nntiirnl Jlintnry). 



PAGE 



I. Introduction ... ...... (il 



II. Descriptions of Species. 



1. Antarctic ..... ... <;2 



2. New Zealand ......... 78 



3. West of Falkland Islands 91 



4. Off Eio de Janeiro . ...... 94 



5. South Trinidad Island . . . 105 

 Index ... . 106 



I. INTRODUCTION. 



THE following descriptive account deals only with a part of the Mollusca obtained by 

 the " Terra Nova" Expedition, namely, the Prosobrauchs, Scaphopods, and Pelecypods. 

 Although the amount of material is not large, the number of undescribed species 

 is considerable, but it is rather disappointing that no new generic, forms were 

 discovered. 



1. Among the Antarctic series (fifty-eight species) twelve are new to the region 

 explored by the " Terra Nova." The paucity of new species in such a remote region is, 

 of course, in a great measure due to the fact that almost the same part of the Antan-i ji- 

 had previously been investigated by the "Southern Cross" and the '' Discovery." 



2. From off the north of New Zealand only thirtv-fuur species \\ere obtained, 

 including four undescribed forms, and at Port Lyttelton, in the South Island, a specimen 

 of Xi/li'ii'i/ii xii/i/i! was extracted from the hull of the " Terra Nova." 



3. Seven species from Station 38 (west of the Falkland Islands, in 12;") fathoms) 

 include three new species of Gastropods, an undescribed ('</t'(//inii. and Ihe 

 (Cardiomya) NintHf/iiut, described as new, from Station 42, ojf Kio de Janeiro. 



VOL. II. M 



