LIGHT PRODUCTION IN CEPHALOPODS. 155 



Genus INIOTEUTHIS Verrill, 1881. (Paired glandular photogenic organs on 



ink sac.) 



3 species: japonica, maculosa, parva. 

 Genus Sepiolina Naef, 1912. (No photogenic species known.) 



1 species. 



Genus EUPRYMNA Steenstrup, 1887. (Paired glandular photogenic organs on 



ink sac.) 

 8 species: bursa, morsel, pusilla, schneehageni, scolopes, similis. steno- 



dactyla, tasmanica. 



Subfamily Sepiadariinje. (No photogenic species known.) 

 Genus Sepiadarium Steenstrup, 1881. 



2 species. 



Genus Sepioloidea d'Orbigny, 1855. 



1 species. 



Family Sepiidce. (No photogenic species known. 'i 

 Genus Sepia Linnaeus, 1758. 



80 species. 

 Genus Metasepla Hoyle, 1885. 



2 species. 



Genus Sepiella Gray, 1849. 



1 1 species. 

 Genus Hemisepius Steenstrup, 1875. 



i species. 



Suborder OCTOPODA. 



Superfamily Cirroteuthoidea. 

 Family CIRROTEUTHID.E. 



Genus Cirroteuthis Eschricht, 1836. (No photogenic species known.) 



8 species. 

 Genus Stauroteuthis Verrill, 1879. (No photogenic species known.) 



3 species. 



Genus MELANOTEUTHIS Joubin, 1912. (A pair of supposed photogenic organs 

 on dorsal aspect of mantle.) 



i species: lucens. 

 Genus Opisthoteuthis Verrill, 1883. (No photogenic species known.) 



6 species. 

 Genus Cirrothanma Chun, 1911. (No photogenic species known. 1 ) 



I species. 

 Genus Froekenia Hoyle, 1904. (No photogenic species known.) 



1 species. 



Genus Vampyroteuthis Chun, 1903. (No photogenic species known.) 



2 species. 3 



Genus Lcetmoteuthis Berry, 1913. (No photogenic species known.) 



i species. 



Superfamily Argonautoidea. 



Family Ocythoidce. (No photogenic species known.) 

 Genus Ocythoe Rafmesque, 1814. 



i recognized species. 



'A possibility seems to exist that this genus is photogenic, cf. Chun, : 13, p. 

 23-25, 27. 



- Cirroteuthis macrope Berry, 1911, appears to belong to this genus. 



