LAMELLIBRANCHIATA. 



15 



Norway; its iiortheni boundary, according- to Sjjarre Schneider, is reached in Norway at 6y°'N.J^. 

 It enters the Kattegat, in the southern part of which it is connnon, as also into the Sound to the 

 isUind Hveen. In the west, as shown above, it ranges to the Faeroes. 



Jeffreys estimates tlie vertical distribution of the species at o — 180 fni., and at Norway accor- 

 ding to Sars, it only goes down to 100 fni. and at the Faeroes to 100 (150?) fm. Nevertheless, Jeffreys 

 states that ihe "Lightning" and "Porcupine" Expcd. have taken it N. of the Hebrides at 530 fm., W. 

 of Ireland at 808 fm. and off the Channel at 257— 690 fm., as well as off Portugal at 364 fm., but it is 

 not stated whether these were living specimens or empty shells; from the Azores also it is given by 

 Fischer and Dautzenberg from a depth of 1360m. 



Pecten island icus Miiller. 



PI. I, fig.s. 4 a — b and c — d (youngl 



Pccttii islaiidicus Miiller, Zool. Dan. Prodrom., 1776, p. 248; Sars, Moll. Reg. Arct. Norv., 1S78, p. 16, 

 PI. 2, fig. 2; Verrill, Trans. Conn. Acad., X, 1899, p. 72, PI. XVI, figs. 2 — 5. — Pecten Fabricii 

 Philippi, Abb. u. Beschreib. neuer oder wenig gekaunter Conchyl., I, 1845, P- ^o^! Pecten 

 Tab. I, fig. 5. 



Pecten islai/dicus Fabricius, Fauna groenl., 1780, p. 415; Moller, Index Moll. Groenl., 1842, p. i6; 

 Morch, Rink's Gronland, 1857, p. 94; Vidensk. Medd. Naturh. Foren. 1868, p. 225; Arctic Manual, 

 1875, P- 133; Rink's Dan. Greenland, 1877, p. 442; Becher, Osterr. Polarstat. Jan INIaycn III, 1886, 

 p. 68; Posselt, Medd. om Gronland, XXIII, 1898, 1x14. 



This species has been taken by the Ingolf-Expedition at the following places: 

 St. 31. Davis Strait 88 fm. i°6 C. i spec, (small). 



- 26. — — 34 - o°6 - I — 



- 127. N. of Iceland 44 - 5°6 - 4 valves (i with remains of soft parts). 



- 87. W. - — (Brede Bugt). . no - 2 — , ancient in appearance. 



- 86. — - — — — .. 76- I small spec, and several valves, ancient in 



appearance. 



6. E. - -- 90 - 7°6 - I young spec. 



West Greenland. 



Ver\' common from the soirthernmost parts and as far north as zoological investigations 

 have been made, namely to Ivsugigsok (76° N. L,.). The largest specimen I have seen is from 

 Egedesminde and measures 105"'"'. It occurs most frequently at depths of 15 — 50 fm. and prefers 

 hard bottom. At some of the colonies (Holsten.sborg, Egedesminde) the Danes frequently send 

 out men to dredge for it on the "banks", where it flourishes in quantity, especially when they have 

 guests to whom they wish to offer this Greenland delicacy; its large adductor muscle has a very 

 good taste and it even seemed to the malacologist H. P. C. Moller "more tender and finer in the flesh 

 than Ostrea edulis'\ The same author states, in a manuscri]-)!, that /-". islaudiciis "moves very rapidly 

 by firm beats of the valves and can thus spring almost a foot each time; I have never seen it use 

 the foot". 



