102 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



ably in proportion to the size of the shell. These largest specimens 

 seem to merge into B. 'pacificus. 



Dr. Thorson has suggested that these medium-sized and large 

 specimens may be a new variety of B. truncatus, but it seems inadvis- 

 able to describe a new variety until a thorough study and revision of 

 the northern species of Boreotrophon have been made. 



Distribution: B. truncatus is known from the Gulf of Maine; from 

 Greenland; Iceland, the British Isles, the Faroes, northern and 

 southern Norway, Spitzbergen, the Barents Sea, and the Siberian 

 Arctic. It is new to Point Barrow and the Alaskan Arctic. 



Family Buccinidae 



Genus Buccinum Linnaeus, 1758 



Masses of egg capsules of Buccinum were found from the time the 

 ice went out until the middle of October. Such masses were sometimes 

 dredged but more often were washed ashore during storms. They 

 ranged from masses of less than a hundred capsules to other masses 

 over 6 inches long and from 2 to 3 inches in breadth. The capsules 

 varied in size; some were smooth, others were Avrinkled. Toward the 

 end of September one mass of capsules still contained eggs. At the 

 beginning of October one mass belonging to another species was made 

 up of both empty capsules and ones containing eggs. In the middle of 

 October, a mass from still another species contained capsules in which 

 there were from 3 to 5 embryos from 1.8 to 4 mm. in length that were 

 still feeding on "nurse eggs." And on October 16, masses belonging to 

 a fourth species contained capsules with eggs only, while in other 

 masses the capsules held from 10 to 12 embryos Avithout shells; still 

 others contained 4 or 5 larger embryos with "nurse eggs"; one capsule 

 contained 14 embryos in an earlier stage, while stiU other capsules had 

 from 15 to 17 embryos with eye spots. 



Buccinum glaciate Linnaeus, 1761 

 And var. ntorchianutn Dunker 



Plate 9, figures 1-7, 10, 13 

 Buccinum glaciale Linnaeus, 1761, p. 523. — Tryon and Pilsbry, 1878-1898, vol. 3, 



pi. 76, fig. 345.— Abbott, 1954, p. 226, pi. 24t. 

 Tritoniuvi carinatum Dunker, 1858, pt. 1, pi. 2, figs. 3, 4. 

 Buccinum morchianum Dunker, 1858, pt. 1, pi. 2, figs. 2, 3. — Tryon and Pilsbry, 



1878-1898, vol. 3, p. 185, pi. 78, fig. 371. 

 Buccinum carinatum Tryon and Pilsbry, 1878-1898, vol. 3, p. 185, pi. 78, fig. 372. 

 Buccinum, glaciale var. parallelum Dall, 1918, p. 231. 

 Buccinum glaciale parallelum Dall, 1921, p. 98, pi. 8, fig. 10. — Oldroyd, 1927, pt. 1, 



p. 239, pi. 17, figs. 9, 10; pi. 27, figs. 1, 2. 



Over 50 living specimens of this species were collected from 19 

 stations. One specimen only came from Eluitkak Pass (40 feet, stony 



