MARINE MOLLUSKS — MACGINITIE 145 



Dendronotus sp. 



Four animals were collected: 2 were dredged at a depth of 150 

 feet on Aug. 23, 1948; 1 washed ashore on Sept. 26, 1949, and another 

 on Sept. 28, 1949. These specimens measured up to 40 mm. in length. 

 The bodies' were translucent white, with chalk white tips on the 

 branches of the cerata. 



Family Flabellinidae 



Genu8 Coryphella Gray, 1850 



Corypliella salmonacea (Couthouy, 1838) 



EoUs salmonacea Couthouy, 1838, p. 68, pi. 1, fig. 2. 



Coryphella salmonacea Bergh (not of M. Sars, 1829, nor G. Sars, 1878), 1864, 



p. 227, pi. 4.— Hagg, 1905, p. 106.— Odhner, 1922, p. 31, fig. 13a.— Lemche 



1941, p. 25. 

 Aeolis papulosa Hagg, 1905, p. 104. 



Four specimens were collected: 3 (28, 42, and 42 mm. long) washed 

 ashore on Sept. 26, 1949; and 1 (42 mm. long) washed ashore on 

 Oct. 16, 1949. These animals were pinkish salmon in color. 



Two specimens, probably belonging to another species, and possibly 

 to another genus, were dredged : 1 (30 mm. long) at Eluitkak Pass on 

 Aug. 30, 1948; and 1 and a fragment at 110 feet on Sept. 16, 1948. 

 The bodies and tentacles of these 2 animals were white, the cerata 

 brick-red, tipped with white. 



Distribution: Point Barrow, Alaska, and (Lemche, 1941) Bering 

 Strait; east coast of North America south to Cape Cod, western and 

 eastern Greenland; northern and eastern Iceland, Jan Mayen, Spitz- 

 bergen, and the north coast of Norway. It is new to Point Barrow 

 and to Arctic Alaska. 



Class Amphineura 

 Family Lepidochitonidae 



Genus Trachydermon Carpenter, 1863 



Trachydermon albus (Linnaeus, 1767) 



Plate 17, figures 3, 4 



Chiton albus Linnaeus, 1767, ed. 12, p. 1107. 



Lepidochitona alba Tryon and Pilsbry, 1879-1898, vol. 14, p. 70, pi. 7, figs. 35-38. 



Thirty -nine specimens were taken: 1 (13 mm. long) from 120 feet 

 (Aug. 8, 1949); 1 (14 mm.) from 130 feet (Sept. 15, 1948); 1 (9 mm.) 

 from 130 feet (Aug. 9, 1949); 1 (9.5 mm.) from 184 feet; 7 (from 9 

 to 15 mm.) from 217 feet; 1 (10 mm.) from 328 feet; 2 (13 mm.) 

 from 341 feet; 7 (from 3 to 13 mm.) from 420 feet; 1 (16 mm.) from 



