PELAGIC ANIMAL LIFE 597 



B. MYOPSID^ 



SPIRULIDyE 



Spirilla aiistralis, Lam., Stations 34, 35, 42, 44, 45. 



Sepiolid/E 



Heteroteuthis dispar, Riippell, Stations 42, 56, 58. 

 Sepiola rondelettii^ d'Orbigny, Stations 39, 96. 

 Rossia caroii, Joubin, Station 70. 



LOLIGINID^ 



Loligo media, L., Stations 14, 20. 

 Loligo forbesi, Steenstr., Station 39. 



Sepiid/E 



Sepia d' Orbignyi, Ferussac, Station 33. 

 Sepia officinalis, L., Station 37. 



II. CEPHALOPODA OCTOPODA 



Philonexid^ 



Tremoctopus atlafificus, d'Orbigny, Stations 51, 53, 62. 



Argonaiita sp.. Stations 45, 49B. 



Larvffi, either of Tremoctopus or Argonaula, Stations 95, 98, loi. 



POLYPODID/E 



Octopus {Polypus), n.sp., Station 58. 

 Octopus {Polypus) lothei, n.sp.. Station 41. 



BOLlT^NIDvE 



Eledonella pygmcea, Verrill, Stations 45, 53, 62. 

 Bolitana diaphana, Hoyle, Stations 35, 53, 56, 64, 92. 



C1RROTEUTHID.E 



Opisthoteuthis agassizii, Verrill, Station 4. 

 Cirroteuthis umbellata, Fischer, Stations 25, 53, 70. 

 Vampyroteuthis infertialis, Chun, Stations 51, 57. 

 Cirrothauma murrayi, n.sp.. Station 82. 



The Tunicata have been so termed from the gelatinous mantle or tunic Tunicata. 

 surrounding their body, which is composed of a peculiar substance, 

 *' tunicin," supposed to be closely related to cellulose. All Tunicata have 

 pelagic larvae, which have long attracted the interest of zoologists, 

 because their central nervous system (medullar tube), sense organs, and 

 axial skeleton present a striking likeness to the lower vertebrates or to 

 the early embryonal stages of the vertebrates. Among the Tunicata 

 there is a large group, the Ascidians, which at the close of larval 



