KUNGL. SV. VET. AKADEMIENS HANDUNGAR. BAND 50. N:0 5. 51 



figiires that of L. latens on Tab. R, Fig. 14 with broad lateral processes; the sinus between 

 them does not exceed lialf the length of the tooth. This figure corresponds to that given 

 by Särs 1878 (Tab. V, Fig. 6 b). On Tab. S, Fig. 5, Bergh figures two other median teeth 

 with rather narrow side-processes and a deeply protrnding sinus. With this there corre- 

 sponds the radula of a specimen from Norway (Diiben), examined by me, as well as that 

 of a specimen from Cullercoats. This same shape is found in the radula of a specimen of 

 L. tentaculata determined (in alcohol) by Loven, of which the shell is like Figs. 2 and 3. 

 The radula of the typical L. perspicua (Pl. 1, Fig. 1) has broad but deeply separated 

 lateral processes, whose inner marginal parts, however, are thinner; the outer thicker 

 parts of them are of the same shape as in the tooth of L. latens. 



Marseniella borealis Bergh 1886. 



Distribution: Florö, Bergen, togetlier with Velutiua velutiua, 1 sp. ((/), 1. 22 nun (Bergh 1886, 1887). 



Marsenina glabra (Couthouy 1839) 



^ M. iiiicroiiiphala Bek(;u 1853; Laiiiellaria perspicua Ii. of Gould & Binxey 1870. 

 n. 1, Figs. 7—11; Pl. 5, Figs. 30, 31. 



Habitat: 



Norway: Finmark (Loven 1837), 1 sh., 1. lO.s; br. 7.5; h. 4.4; col. br. 2; wh. 2 (Fig. 

 7, left) and 1 sp., 1. (sh. ) 9, types of Lamellaria prodita Loven 1846. — Karlsö, N. of 

 Tromsö, 70 fms (Goés & Malmgren 1861), 1 sh., 1. 5.5; br. 4; h. 2.4; col. br. 1. — Grötsund, 

 40—50 fms, clay (G. & M. 1861), 1 sp., 1. (sh.) S.s; br. 4; wh. 2. — Hammerfest, 100 

 fms, sand (Loven?), 1 sp., 1. (sh.) 11; br. 7.8; h. 5; col. br. 2.i; wh. 2 + (Pl. 1, Fig. 7, right; 

 Fig, 8; Pl. 5, Fig. 30). The specimens from the three last-named localities belong to for- 

 ma typica (= M. micromphala Bergh). 



Iceland (Odhner 1910): Berufjord, 15—30 fms (Torell), 1 sp., 1. an. 10, 1. sh. 8. 



East of Greenland (Hägg 1905, as M. micromphala Bergh). Measurements (No. 

 I in Hägg): 1. an. 16, dorsal fissure 1. I.2; br. (an.) 9.4; h. 8.4 (Pl. 1, Fig. ll)andl. an. 14, 

 dorsal fissure 1. 2.5 (Pl. 5, Fig. 31). 



East Greenland (Hägg 1905, No. 2, as M. micromphala): 1. an. 15, dorsal fissure 

 1.4; br. 10.1; h. 7.4. 



Spitzbergen: King Charles Land, Bremer Sound, 100 — 110 m, bottom temp. — 1.45°, 

 fine clay with big stones, Biloculina sparse (Vs 1898), 1 sp., 1. an. 17, I. sh. 10; br. sh. 

 7.4 (Fig. 9). 



North of Siberia (Aurivillius 1887). Measurements: Vega St. 1007, M. microm- 

 phala of Aurivilhus, 1. sh. 15; br. 10; h. 6; M. groenlandica of Aurivillius, 1. sh. 8.5 (Fig. 10). 

 Further: Vega St. 1022, 2 miles N. of the winter harbour, 12 — 14 fms, sand (% 1879), 

 1 sp., 1. sh. 9; br. 6.6; h. 4.3; col. br. 2.2; wh. 2. 



