LAMELLIBRANCHIATA. 



21 



In recent years, further, it has been taken at other places at Iceland and the Fseroes, namely: 



Iceland. 



63=15' N.L., 22'23'W.L 170-114 fm. 



63°i8' - 2i°3o' - 94 - 



63°o5' 



20°o7' - 293 - 



63° 1 2.5'— 20°06' 



268 - 



Faeroes. 



62-29' N.L., 5' 17 

 61^40' — 

 6i°i5' - 

 6i°09' — 

 61^07' — 

 61 "06' - 



740' 

 9°35 

 7 '54' 



9'3o' 

 921 



W. L. 



. . . 191 fm. 



••• 135 - 



ca. 475 - 



. . . 180 - 



. .. 440 - 



. . . 210 - 



Akralejte in N. 57 W. 12 miles ca. 150 

 13 miles W. by S. of Munken - 150 



2 spec, and 23 valves. 



I fragment. 



II valves. 



1 valve. 



2 valves. 



ca. 25 valves. 



3 valves. 



2 spec, and 5 valves. 



I valve. 



I — 



9 spec. &. numerous valves. 



I valve. 



Pecicn semptemradiaUis is thus quite common round the Faeroes and the south and south-west 

 of Iceland, which has not been known hitherto. It does not enter the fjords, however, occurring only 

 in the open sea. It has been taken at depths of 90—475 fm. (living specimens however only from 

 132 — 316 fm.). 



The specimens to hand from Iceland and the Faeroes show no small variation with regard to 

 the sculpture of the shells. Compared with typical specimens (from the Kattegat) they liave on the 

 whole more numerous folds (8—13) (PI. I, figs. 6 a — b) and are very distinctly radially striated on the left 

 shell. Some specimens are smooth, in others again the radiating stripes of the left shell are rough 

 from the presence of small, down-turned scales; lastly, the specimens from stations 9 and 89 of the 

 "Ingolf have not only the stripes on the left valve densely beset with such sharp scales (PI. I, fig. 6 c), 

 but likewise have the stripes which lie between the radiating folds of the right valve provided with 

 small spines. Had transitions not been present, one might have been tempted to consider the last- 

 named specimens as belonging to an independent species; it will now be most correct to call this, the 

 most strongly spined form, by the name of var. scaber. 



At the Fseroes and Iceland the species attains to a considerable size; the largest specimens 



measure: 



lyength 55 "^"> Height 52 ™™ Breadth 13 """ 



— 55 - — 55 - — 13-5 - 



Distribution. According to Locard') Pecten scptoiiradiatus does not live in the jMediterrauean, 

 but is an oceanic species occurring off West Africa (Sahara), at the Canaries, the French Atlantic coast 

 and in the Channel. At the northern parts of the British Isles, as also in the southern Skager Rak 



I) A. Locard: Contrib. a la faune malacol. fran(;aise, XI, Mouogr. Pecten, 18SS, p. 90; idem: Res. scient. de la camp, 

 du "Caudan", 1896, p. 211. English authors are said to have confused with P. septemradiatus the more southerly P. clavatits 

 Poli (^ P. inflexa Poll; P. Dumasti Payraudeau). Cf. also Bucquoy, Dautzenberg et Dollfus: Les Moll, marins du 

 Roussillon, II, 1887 — 98, pp. 69 — 70; cf. also, however, the record of the occurrence of P. septemradiatus at Bouches du Rhone, p. 802. 



