132 PROCEEDINGS OF THE NATIONAL MUSEUM vol.io» 



Family Turridae 



Some of the generic names, such as Beta and Lora, formerly used 

 in this family are not available. Several new genera (see Bartsch, 

 1941) have been erected, but these and the other available generic 

 names do not cover the entire familj^. Consequently, it is impossible 

 to assign some species to a genus. In this paper, such species have 

 been placed under "Oenopota." 



Genus Obesotoma Bartsch, 1941 



Obesotoma tenuilirata (Dall, 1871) 



Plate 16, figure 1 



Bela tenuilirata Dall, 1871, p. 98. 



Lora tenuilirata Dall, 1919a, p. 42, pi. 15, fig. 4. 



Four specimens were dredged: 1 living specimen (17.4 mm. high by 

 8.8 mm. in diameter) from 132 feet; 1 living (12.6 by 6 mm.) and 1 

 dead (12.4 by 6 mm.) from 217 feet; and 1 living (11.4 by 5.5 mm.) 

 from 477 feet. In the specimen from 132 feet the ribs of the apical 

 whorls are more or less eroded and the nucleus is worn but not 

 decorticated. 



Other material examined: The type, from Norton Sound, and 

 approximately 20 other specimens from localities ranging from Point 

 Barrow to Bristol Bay. 



Distribution: Point Barrow to Hagemeister Island, and Unimak 

 Island in the Aleutians. Dall (1921) gives the southeastern range as 

 the Shumagins, but I could find no specimens nor records of specimens 

 from east of Hagemeister and Unimak Islands. Johnson (1934) 

 gives the Atlantic range as "off Martha's Vineyard, 365 fathoms." 



Obesotoma sp. I 



Four shells were dredged: 1 (14.4 by 7 mm.) from 125 feet; 1 (14.8 

 by 7.2 mm.) from 213 feet; 1 (9 by 4.5 mm.) from 216 feet; and 1 

 (15.8 by 7.5) from 149 feet. 



Discussion: These specimens correspond to Bartsch's manu- 

 script species No. 227, of which there are 7 specimens (from Plover 

 Bay) in the collection of the U. S. National Museum. 



Distribution: Point Barrow, Alaska, and Plover Bay, Siberia. 



Obesotoma sp. 2 



Two living specimens were dredged: 1 (15.1 by 7 mm.) at 130 feet 

 on Aug. 9, 1949; and 1 (14.6 by 6.8 mm.) at 216 feet. 



Discussion: These two specimens agree fairly well with Bartsch's 

 manuscript species No. 135, of which there are 3 dead and worn shells 



