EAST AMERICAN SCAPHOPOD MOLLUSKS. 5 



The Albatross also made some further explorations in the Gulf of 

 Mexico and the Carihbean, and, finally, while leaving the Atlantic in 

 1887, established a series of stations along the South American coast. 

 Doctor Dall published the results in 1892 in the Proceedings of the 

 United States National Museum. This added to our already ex- 

 panded list Dentalium ceras Watson, D. candidum Jeffreys, and 

 Cadulus tumidosiis Jeffreys. 



No further additions were made until the appearance of Pilsbrj" 

 and Sharp's monograph of the Scaphopoda in 1897-8, this being 

 volume 17 of Tryon's Manual of Conchology. In this comprehensive 

 work the authors carefully redefined all subgenera, grouped the species 

 according to their affinities, made many useful keys, amplified many 

 old descriptions, and illustrated anew mam^ types in scales of large 

 magnification. Although a monographic work upon the Scaphopoda 

 of the world in general, it remains to-day, for our western Atlantic- 

 forms, the last and best word upon the subject. The following new 

 species and subspecies to be included in our list where therein created: 



Dentalium stenoscJiizum Pilsbry 



and Sharp. 

 Cadulus tetrodon Pilsbry and 



Sharp. 

 Cadulus hatterasensis Pilsbry 



and Sharp. 

 Cadulus rushii Pilsbry and Sharp. 



Dentalium meridionale Pilsbry 



and Sharp. 

 Dentalium liodon Pilsbry and 



Sharp. 

 Dentalium liodon alloscJiismum 



Pilsbry and Sharp. 

 Dentalium pressum Pilsbry and 



Sharp (new name for compres- 



sum Watson). 



The collection in the United States National Museum of the 

 Scaphopods of the Western Atlantic is made up of the type lot mate- 

 rial from the various United States governmental collecting sources 

 heretofore mentioned, together with some material obtained by ex- 

 change or gift. Such was the collection in 1898 when consulted by 

 Doctor Pilsbry in the preparation of his monographic work. During 

 the past 20 years the museum collection has been greatly augmented. 

 Many specimens have been culled from hitherto unsifted lots of 

 Albatross material dredged in the Gulf and Caribbean in 1885 and 

 1886. Other lots have been received from shallow-water Antillean 

 stations obtained by numerous collectors. Much material has also 

 been received from the Bureau of Fisheries Station at Beaufort, 

 North Carolina, collected by the Fish Hawlc during the last few 

 years in the region about Cape Lookout. Several hundred lots of 

 Scaphopods have been added to the collection during the last five 

 years from my ovm dredgings in the yacht Eolis, operating in the 

 Florida Keys region from Tortugas to Miami and in the Bahamas in 

 depths from the shore to about 200 fathoms. Much interesting mate- 



