114 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iw 



Buccinum undatum (Linnaeus, 1761) 

 Var. striatum Pennant 



Plate 10, figure 5 



Buccinum undatum Linnaeus, 1758, p, 740; 1767, p. 1204. 



Buccinum undatum Linnaeus var. striatum Pennant, 1812, vol. 4, p. 272. 



A single living specimen, measuring 24.8 by 14.6 mm., was dredged 

 at a depth of 477 feet on Sept. 6, 1949. 



Discussion : This specimen does not conform with any species that 

 I have seen. Dr. W. J. Clench (personal communication) considers 

 it very close to the var. striatum of B. undatum.. It is a young shell 

 with a thin gray periostracum with delicate axial folds beset with 

 hairs much as in B. ciliatum. The spiral sculpture is also suggestive 

 of B. ciliatum in that heavier axial threads alternate with smaller 

 ones, and there is also a little of the wavy effect characteristic of 

 B. angulosum. However, the general structure of the shell rules out 

 B. ciliatum, for it is larger in diameter m proportion to the length; 

 the aperture is longer in proportion to the remainder of the shell, the 

 canal is not reflexed, the whorls are more tumid and enlarge more 

 rapidly, and the entire shell is much thinner and lacks the sturdiness 

 of B. ciliatum. On the last whorl there are about 22 axial ribs that 

 evanesce at the periphery, and the next to the last whorl has about 

 the same number, that become increasingly faint toward the apex. 



Distribution: B. undatum has been recorded from Labrador to 

 New Jersey and from Europe; the var. striatum has been recorded 

 from off Labrador from 60 to 80 fathoms. 



Genus Pyrulofusus iNIorch, 1869 

 Pyrulofuaus dejormis (Reeve, 1847) 



Plate 13, figures 3-5 



Fusus dejormis Reeve, 1847, vol. 4, Fusus, pi. 12, figs. 45a-b. 

 Pyrulofusus dejormis Dall, 1921, p. 89.— Oldroyd, 1927, pt. 1, p. 184. 



Two living and 2 dead specimens of this species, the largest snail 

 taken at Point Barrow, were collected: The smallest, consisting of 

 about 2.5 nuclear and one postnuclear whorl, and which measures 

 35.9 mm. high by 19.6 mm. in diameter, was taken at a depth of 438 

 feet; the largest (142 by 83 mm.) was dredged at 130 feet (Sept. 15. 

 1948); the 2 dead specunens (72.4 by 28.2 mm. and 83.5 by 42 mm.) 

 were taken from 453 feet and 120 feet (Sept. 15, 1948), respectively. 

 Approximately one fourth of the surface of the largest shell (pi. 13, 

 fig. 5), a live specimen, was covered with colonies of encrusting bryo- 

 zoans of at least three different species, and several small barnacles 

 were also attached to it. Even the smallest shell (pi. 13, fig. 3), also 



