ATLANT. DEEP-SEA EXPED. 1910. VOL. III]. 



PTEROPODA. 



19 



where a dense swarm was taken; it is of 

 interest to note that this swarm was not (like 

 that at St. 1) found at the surface where the 

 water was warmer, but at a depth of about 

 200 metres. 



Limacina bufimoides d'Orbigny. 



This species was found scattered in the 

 western part of the Atlantic, between the New- 

 foundland bank and the Azores, and at one 

 station off the Canaries. The columellar margin 

 and the suture were in most of the specimens 

 bright red. 



Station 



39 



52 



53 



62 



69 



Date 



2 %- 21 /5 



6 /6- 7 /G 



8 /g- 9 /g 



20/ 6 _21/ e 



29 A> 



N 

 Position yj 



26° 3' 

 15° 0' 



31° 24' 



34° 47' 



34° 59' 

 33° r 



36° 52' 

 39° 55' 



41° 39' 

 51° 4' 



Depth in m. 



0— 50 



50-100 



100—250 



250—500 



11 



4 

 12 



20 



20 



5 



Fig. 19. Chart showing salinities and temperatures at a depth of 200 fathoms 



during the summer of 1910. Crosses denote localities where Limacina balea 



was taken during the expedition. 



Number of individuals of Limacina bulimoides. 



Limacina lesueuri d'Orbigny. 



The distribution of this species 

 in the Northern Atlantic resembles 

 that of the preceding, — scattered 

 over the western part between the 

 American coast and the Azores, 

 and off the Canaries, not a single 

 specimen beingtaken in the eastern 

 half of the open ocean. The 

 number of individuals preserved 

 is considerably larger than that 

 of L. bulimoides. 



Station 



39 



42 



52 



53 



56 



62 



64 



67 



81 



Date 



20 /s- 2 V5 



23 /s- 24 /5 



"/e-'/e 



8 /s- 9 /e 



10 /6- u /e 



20/ 6 _21/ 6 



24 / 6 



2? /<s 



12/, 



Position w ' 



26° 3' 

 15° 0' 



28° 2' 

 14° 17' 



31° 24' 

 34° 47' 



34° 59' 

 33° V 



36° 53' 

 29° 47' 



36° 52' 

 39° 55' 



34° 44' 

 47° 52' 



40° 17' 

 50° 39' 



48° 7' 

 39° 50' 



Depth in m. 



0- 50 



50—100 



100-250 



250—500 



11 



2 



4 



1 



16 

 5 



6 



50 



80 

 (5) 



1 

 1 



3 



2 



Number of individuals of Limacina lesueuri. 



Limacina in f lata d'Orbigny. 



This species was taken during 

 the "Michael Sars" expedition at 

 the same stations as L. lesueuri, 

 and at corresponding depths, but 

 (like L. balea and L. retroversa) 

 it occurs in dense swarms; it may 

 be counted in hundreds, where its 

 constant companion L. lesueuri is 

 represented by single individuals. 



Station 



39 



42 



52 



53 



56 



62 



64 



67 



81 



Date 



20 /5-"/6 



28 /5- 2 V5 



e /e-Ve 



8 / 6 - 9 /e 



w k- n h 



2 °/e- 21 /6 



2 Vs 



27 /e 



12/ ? 



N 

 Position y\ 



26° 3' 

 15° 0' 



28° 2' 

 14° 17' 



31° 24' 

 34° 47' 



34° 59' 

 33° V 



36° 53' 

 29° 47' 



36° 52' 

 39° 55' 



34° 44' 

 47° 52' 



40° 17' 

 50° 39' 



48° 2' 

 39° 55' 



Depth in m. 



0— 50 



50—100 



100—250 



250-500 



100 

 swarm 



7 

 1 



10 

 20 



450 



200 

 10 



300 

 250 



200 



10 



4 



2 



Number of individuates of Limacina inflata. 



