76 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
m; E. of Morocco, 1943 m (Locard 1898). — Off Portugal, 740—1095 fms (Jeffreys 
1883; Nobre 1905). — Greenland, from Disco southwards, to 100 fms (d. 2 mm; 
Posselt & Jensen 1899). — East Canada, 4 fms (Whiteaves 1901). — Grand Manan, 
New England, in deep water (Gould & Binney 1870). — St. Thomas, West Indies 
(Verkräzen fide Jeffreys 1883). Depths to 1943 m. Clay, sand, stones. 
Cyclostrema areolatum G. O. SaArs 1878. 
Distribution: Norway, Lofoten, 80—100 fms (d. 1.4, G. 0. Sars 1878). — Fair Isles, 61? 49' N., 5? 
36' W., 160 m, 1 sp. (Simpson 1910). — Between Hebrides and Faroe Isles, 170 fms (Jeffreys 1883). 
Cyclostrema millepunctatum FRIELE 1886. 
Distribution: W. of Tromsö, 649 fms, Norwegian North-Atlantic Exp., St. 192 (Friele 1886). 
Cyclostrema basistriatum (JEFFREYS) G. O. SaArRs 1878 
(incl. var. striolata G. O. Sars 1878). 
Pl HIfgsA0 Rand 2 PEATEiSIS: 
Habitat: 
Skagerrack, 336 fms, clay (Lindahl) 2 shs, max. h. 1.3; ap. 0.9; d. 1.5; wh. 
« — Bergen and Kristiandsund, 60—70 fms (Lilljeborg) 10 sps, max. d. 2.5 (Mus. 
U.). — Lofoten, 200—-300 fms (M. Sars) many sps, max. h. 2.4; ap. 1.5; d.: 2:75; wh. 
3'/4, Fig. 40. — Spitzbergen, a bay in Hinlopen Strait, 50 fms, reddish clay (1861) 
1 sh., h. 1.6; ap. 1.2; d. 2; wh. 3'/2 (strie very faint but equidistant, as in: the type; 
umbilicus somewhat narrower than usual), Fig. 42. 
9 1 
pg 
General Distribution: 
Norway, Lofoten, 120—300 fms and west coast, 50—450 fms (d. 2.5; G. 0. 
Sars 1878; Friele 1874). — N. of Hebrides and Orkney Islands, 130—355 m (Simp- 
son 1910). — North Atlantic 56” 1' N., 34” 42' W., 690 fms (Jeffreys 1877). — Porcu- 
pine Exp. 1869, St. 89, 445 fms (Jeffreys 1883). — France, Golfe de Gascogne, 1020 
m (Locard 1898, 1899). — Off Cape Mondego, Portugal, 740—1095 fms (Jeffreys 
1883, Nobre 1905). 
var. profunda FRrRIELE 1879. 
Distribution: W. of Spitzbergen, 120—1333 fms and W. of Tromsö, 649 fms, Norwegian North-Atlantic 
Exp. St. 353, 357 and 192 (Friele 1879, 1886; Friele & Grieg 1901). 
