LIGHT PRODUCTION IN CEPHALOPODS. 153 



Genus PYROGOPSIS de Rochebrune, 1884. 



4 species: pacificus, rhyncophorus, schneehageni, zygaena. 

 Genus LEACHIA Lesueur, 1821. 



3 species: cyclura, ellipse ptera, eschscholtzii. 

 Genus LIGURIELLA Issel, 1908. 



I species: podophthalma. 



Subfamily Taoniinae. (A large single or duplex photogenic organ on each eye- 

 ball.) 



Genus PHASMATOPSIS de Rochebrune, 1884. (Photogenic organs not yet 



described.) 

 i species: cymoctypus. 



Genus TOXEUMA Chun, 1906. 

 i species: belone. 



Genus TAONIUS Steenstrup, 1861. (Photogenic organs not yet described.) 

 i species: pavo. 



Genus VERRILLITEUTHIS Berry, 1916. (Photogenic organs not yet described.) 

 i species: hyperborea. 



Genus MEGALOCRANCHIA Pfeffer, 1884. 



5 species: abyssicola, fisheri, maxima, pardus, pellucida. 

 Genus LEUCOCRANCHIA Joubin, 1912. 



I species: pfefferi. 

 Genus TAONIDIUM Pfeffer, 1900. (Photogenic organs not yet described.) 



4 species: chuni, incertum, pfefferi, suhmi. 

 Genus CRYSTALLOTEUTHIS Chun, 1906. 



i species: glacialis. 

 Genus PHASMATOTEUTHIS Pfeffer, 1912. 



1 species: richardi. 



Genus GALITEUTHIS Joubin, 1898. 



2 species: armata, phyllura; possibly identical. 



Genus CORYNOMMA Chun, 1906. (A pair of photogenic organs embedded in 



the liver in addition to the subocular photophores.) 



i species: speculator. 



Genus HENSENIOTEUTHIS Pfeffer, 1900 (-\-Sandalops Chun, 1906, Helico- 

 cranchia Massy, 1907, and Teuthoivenia Chun, 1919.) 



5 species: antarctica, joubini, megalops, melancholicus, pfefferi. 

 Genus BATHOTHAUMA Chun, 1906. 



3 species: bergeti, boureei, lyromma. 



Division MYOPSIDA. 

 Superfamily Loliginoidea. 



Family Loliginidce. (No photogenic species known.) 

 Genus Acroteuthis Berry, 1913. 



3 species. 

 Genus Doryteuthis Naef, 1912. 



5 species. 

 Genus Loligo Schneider, 1784. 



32 species. 

 Genus Lolliguncula Steenstrup, 1881. 



3 or 4 species. 



