TESCH— PTEROPODA AND HETEROPODA 171 



Stat, dd, Oct. 7, 4- — 5.30 p.m. Alphonse Island. 



Surface. Limacina trochiformis (1), Creseis virgula (13), Cavolinia longi- 

 rostris (1). 



Stat, ee, Oct. 7—8, 9 p.m.— 6 a.m. 10 miles S.E. of Alphonse Island. 

 Surface. Clio pyramidata (1), Cavolinia uncinata (2, I empty). 



Stat, kk, Oct. 16, 8—9.30 a.m. Desroches Atoll. 

 50 — fms. Hyalocylix striata (4). 

 100 — fms. Hyalocylix striata (2), Desmopterus papilio (2). 

 150 — fms. Creseis acicula (6), Hyalocylix striata (3). 



300 — fms. Clio pyramidata (l), Cavolinia tridentata (2, " Pleuropus 

 longifilis "). 



Stat. 11, Oct. 16, morning. Same position. 



750 — fms. Clio pyramidata (10), Cavolinia globulosa (10). 



Stat, mm, Oct. 16, noon. Same position. 



400 — fms. Hyalocylix striata (1), Cuvierina columnella (l), Clio pyramidata 

 (7), Cavolinia longirostris (3), Cavolinia globulosa (l), Diacria quaclri- 

 dentata (2, 1 " Clcodora pygmcea "). 



Stat, nn, Oct. 16, afternoon. Same position. 



200 — fms. Creseis virgula (l), Creseis acicula (4), Cuvierina columnella (1), 

 Clio pyramidata (13), Cavolinia longirostris (1), Diacria trispinosa (l), 

 Cymbidia sp. (1). 



B. Dredging Stations. 



Stat. C 16, Sept. 6. Saya de Malha Bank, 26 fms. Dredge triangular. 



Diacria trispinosa (3), Diacria quadridentata (7), Cavolinia uncinata (2), 

 Cavolinia globulosa (2), Cavolinia gibbosa (3). Only empty shells. 



Stat. C 20, Sept. 7. Saya de Malha Bank, 331—500 fins. Trawl. 



Clio pyramidata (3), Clio cuspidata (2), Cavolinia uncinata (A, empty), Cavolinia 

 gibbosa (4, empty). 



3. VERTICAL DISTRIBUTION. 



As closing nets were used by the expedition only a few times, and no Pteropods were 

 brought up by them, we are obliged to restrict ourselves to the results of the vertical hauls 

 with open nets. Though for our special purpose their results are more vague and not 

 quite so decisive as that of closing nets, they can be taken into account, as the exact hour 

 of catch is nearly always given. 



Now, as is well known, the Pteropoda make daily migrations in a vertical direction. 

 At day-time they remain in deeper layers ; as soon as it is getting dark, however, they 

 rise to the surface. This seems especially to be the case with Euthecosomata and 



