6oo DEPTHS OF THE OCEAN 



smaller forms, the colony was spotted with red, the red spots being the 

 visceral nuclei of the several animals. The specimen was kept in a tub 

 of water till after dark, when it gave off brilliant phosphorescent light on 

 being disturbed. The officers amused themselves by writing their names 

 along this living cylinder with one finger, the track of which remained as 

 a bright line of light for some seconds. Salpae were the commonest 

 animals in the surface waters ; there were several kinds, and many long 

 bands of them in the chain form were taken in the surface nets. Brilliant 

 phosphorescence was observed at night during calm weather."^ During 

 the Atlantic cruise of the "Michael Sars" great quantities of Salpae, 

 Dolioliuii and Pyrosoma, were captured. The collections have been 

 examined by Bjerkan, to whom I am indebted for the following list, 

 which shows that many of the species are widely distributed in the 

 North Atlantic. Excluding the Appendicularia, which have not yet been 



Fig. 448. 



Pyrosoma spinosu7n, Herdman. Nat. size. 



investigated, seventeen species were taken during the cruise, of which seven 

 were taken to the north as well as to the south of the Azores. 



Cydosalpa pi7inata, Forsk., Stations 56, 57, 58, 59, 86, 88. 

 Cyclosalpafloridana, Apstein, Stations 22, 25, 29. 



Salpa maxima, Forsk., Stations 29, 33, 34, 35, 42, 43, 52, 56, 62, 66, 86, 88. 

 Salpafusiformis, Cuv., Stations 10, 19, 31, 39, 51, 52, 53, 56, 58, 67, 81, 82, 84, 



86, 87, 88, 90, 92, 94, 97, 98, 100, loi, 102. 

 Salpa fu sif or m is {ormdi aspera, Cham.,- Stations 10, 15, 19, 24, 25, 29, 32, 51, 



58, 62, 67, 84, 87, 88, 90, 92. 

 Salpa amboinensis, Apstein, Stations 19, 23, 49, 56, 58. 



Salpa mucronata, Forsk., Stations 32, 43, 44, 45, 50, 56, 57, 58, 59, 67, 83, 87. 

 Salpa confcederata, Forsk., Stations 31, 40, 42, 43, 51, 69, 81, 84, 86, 88. 

 Salpa zonaria, Pall., Stations 10, 15, 22, 23, 25, 29, 42, 43, 56, 62, 66, 67, 71, 80, 



81, 82, 84, 88, 97, 102. 

 Salpa tilesii, Cuv., Station 10. 

 Salpa henseni, Traustedt, Stations 56, 58. 



Doliohim tritonis, Herdman, Stations 88, 90, 92, 94, 98, 100, loi. 

 Doliolum sp., Stations 23, 25, 29, 32, 34, 44, 48, 49, 56, 67, 84. 

 Pyrosoma spinosu?fi, Herdman, Stations 10, 39, 51, 62, 64, 67, 81, 84, 87, 88, 90. 

 Pyrosoma gigantei/m, Lesueur, Stations 29, 48, 87, 88. 

 Pyrosoma atla)iticiim, Peron, Stations 42, 47, 56, 58. 

 Pyrosoma, n.sp.. Stations 49, 56, 88. 



1 Narrative Chall. Exp., vol. i. p. 170, il 



2 Previously forma ecliiuata (Herdman). 



