2 PKOCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



scaphopod material from this series. The references to this group 

 in the following pages are taken from Bulletin 111 of the United 

 States National Museum containing Mr. Henderson's excellent mono- 

 graph, published in 1920. 



During the summer of 1922 I was able to take up the description 

 of the other moUusca comprised in the present paper. 



To avoid tiresome repetition the material from the two dredgings 

 is referred to herein simply as "off Fernandina" and "off Georgia," 

 since the localities are only a few miles apart and the difference in 

 depth only 146 fathoms, the fauna may reasonably be regarded as 

 nearly or quite the same for both places. 



I have no means of determining what were all the larger species 

 which were removed from these dredgings before they came into my 

 hands, but I have found records of Aurinia gouldiana Dall, Drillia 

 acryhia Dall, Pleurotoma dalli Verrill, and Triphora triserialis aspera 

 Jeffreys; the last from oflF Georgia, the others from off Fernandina. 



I have omitted from the list surface forms like the Pteropods and 

 Williamia, also two or three shells which are clearly adventitious. 



My colleague Dr. Paul Bartsch, has kindly determined and 

 described the Pyramidellidae of the collection, a group to which he 

 has paid particular attention. 



The total number of species in the material examined is 337. This 

 includes 5 species of Brachiopoda, 41 Pelecypoda, 14 Scaphopoda, and 

 277 Gastropoda.^ Of these 73 species were found at both stations, 

 171 only off Fernandina, and 84 only off Georgia. The difference 

 may partly be due to the fact that the total amount of bottom mate- 

 rial from off Georgia was only about half as much as that collected 

 off Fernandina. 



Out of the total number (337) of species collected, 204 appear to 

 be undescribed, which gives an idea of the richness of certain locali- 

 ties on the sea bottom when conditions are favorable. If we add to 

 this number 6 species of Scaphopods described by Mr. Henderson 

 the total is still more striking. 



LIST OF THE SPECIES 



BRACHIOPODA 



Terebratulina cailleti Crosse. 

 Gryphus cubensis Pourtales. 

 Gryphus affinis Calcara. 



Nucula culebrensis E. A. Smith. 

 Nucula fernandina Dall. 

 Nucula verrillii Dall. 

 Nucula proxima ovata Verrill. 



Dallina floridana Pourtales. 

 Pelagodiscus ailanticus King. 



MOLLUSCA— PEl.ECYPODA 



Leda messanensis Seguenza. 

 Leda orixa Dall. 

 Leda aspecta Dall. 

 Leda bipennis Dall. 



1 These numbers refer to the species in the present paper. See for additions the Supplement on p. 115. 



