I04 



LAMELLIBRANCHIATA. 



Klaksvig n fni-, from rhizoids of Laminaria. i spec. 



Rordovig 7 — lo - , black sand and small stones. 30 — & 14 valves. 



— 10 - , sand. 5 — & 4 — 



Fundingsfjord 12 — ca. 20 - , coarse sand and clay. 2 — & 2 — 



Andefjord 16 — 23 - 2—1 valve. 



Skaalefjord 4—5 - i valve. 



Kongshavn 2 spec. 



— 12 — 16 - , small stones, sand & ooze. 3 — & 14 valves. 



— ca. 50 - 33 — '^ 90 — 



Vestmansnnd - 70 - 12 valves. 



Vestmanhavn 3'/2 — 5 - , fine black sand. ca. 125 spec, (small). 



— 5 — 6 - , fine black sand. 10 spec. & 70 valves. 



vSorvaag 14 — 161/2 - , ooze. i valve. 



Midvaag, beach i — 



Thorshavn 3 — 



Nolso, deep hole at north end ca. 100 fm. i spec. & i valve. 



Vaagfjord 10 - i — 



5 miles S. S. E. of Bispen 50 - 8 valves. 



13 — W. by vS. of Munken - 150 - i valve. 



The Fjeroese specimens belong to the typical A. Aloiitagni. thongh sometimes with a tendency 

 in the direction of \ds. striata, as will be seen from the measurements below: 



Height Breadth 



Locality Length Height ^^ — Breadth 



Length Length 



Klaksvig 20.6 "">'. 19.5 "'"'. 94.7 7o 9-8 """• 49 °/o 



Andefjord 19.8 - 17.5 - 88.4 - 10 - 50.5 - 



— 16.8 - 15.5 - 92.3 - 8.75 - 52.1 - 



Nolso 17.2 - 15.2 - 88.4 - 7.8 - 45.3 - 



Kongshavn 17 - 15.3 - 90 - 8.2 - 48.2 - 



— 16 - 14.2 - 88.8 - 8.2 - 51.3 - 



— 15-8 - 15 - 94-9 - 8.5 - 53.8 - 



— 15-5 - 13-8 - 89 - 8 - 51.6 - 



— 147 - 13 - 92-9 - 7-5 - 51 - 



— 14 - 13-5 - 964 - 8 - 57.1 - 



— 14 - 13 - 92-2 - 7-5 - 53-6 - 



Vaagfjord 14 - 12.7 - 90.7 - 7 - 50 - 



Fundingsfjord 12.8 - 11. 8 - 92.2 - 7-2 - 56.3 - 



Viderejde 13 - 11.7 - 90 - 7 - 53.8 - 



Concluding remarks. It may be seen from the foregoing, that there is a certain regularity 

 in the variation of the species, since the form becomes elongated on the whole in the same degree 

 as the marine climate becomes more severe. At the Faeroes and the southern West Iceland we 

 have only the short A. Montagjti typico. though sometimes with a tendency in the direction of the 

 slightly more elongated variety striata; at northern West Iceland the variety striata begins to appear 



