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 



(Verkrüzen fide Jeffreys 1883). Depths to 1943 m. Clay, sand, stones. 



Cyclostrema areolatum G. O. Sars 1878. 



Distribnlioii: Norway, Lofoten, 80 — 100 fms (d. 1.4, G. 0. Sars 1878). — Fair Isles, 61°49'N., 5° 

 36' W., 160 m, 1 sp. (Simiisoii 1910). — Between Hebrides and Faroe Isles, 170 fms (Jeffreys 1883). 



Cyclostrema millepunctatum Friele 1886. 



Distribution: W. of Tronisö, 649 fms, Norwegian North-Atlantic Exj)., St. 192 (Friele 1886). 



Cyclostrema basistriatum (Jeffreys) G. O. Sars 1878 

 (incl. var. striolata G. 0. Sars 1878). 



■ PI. 5 figs. 40 and 42; PI. 7 fig. 8. ' 



Habitat: 



Skagerrack, 336 fms, clay (Lindahl) 2 shs, max. h. l.s; ap. 0.9; d. 1.5; wh. 



2 V*- — 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. 2.7; wh. 



3 V*j 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 V2 (striae very faint but equidistant, as in the type; 

 umbilicus somewhat narrower than usual). Fig. 42. 



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 Friele 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). 



