FISHERY BULLETIN: VOL. 80, NO. 4 



1. Tentacular stalk and club robust, suckers 

 on dactylus many and in four rows; carpal 

 cluster round to oval; semilunar mem- 

 brane present or absent 5 



2. Mantle photophores in longitudinal rows 

 only 3 



2. Mantle photophores in longitudinal and/ 

 or oblique rows 4 



3. Eight well-spaced mantle rows, all 

 reaching anterior mantle edge; eight 

 photophore rows on head, second and 

 third lateral rows united posterior- 

 ly octolineata 



3. Seven well-spaced mantle photophore 

 rows, only six reaching anterior mantle 

 edge; eight photophore rows on head, none 

 united leptura 



Two photophore rows on median part of 

 mantle, oblique photophore rows on 



sides obliqua 



Longitudinal rows and intersecting 

 oblique rows of photophores on mantle 

 (reticulate pattern) reticulata 



4. 



6. 



6. 



Midventral photophore rows on head com- 

 plete; first and second lateral photophore 

 rows unbranched; photophore row on arm 



III complete 6 



Midventral photophore row on head in- 

 complete; first lateral photophore row on 

 head divided and reunited; photophore 

 row on arm III incomplete 8 



Eight photophore rows on mantle, distinct 

 for one-third of mantle length; semilunar 



club membrane present chuni 



Six photophore rows on mantle or no 

 rows, photophores scattered; semilunar 

 club membrane absent 7 



7. Six photophore rows on mantle, photo- 

 phores scattered on posterior half of 

 mantle theragrae 



7. No photophore rows on mantle, mantle 

 photophores scattered; some areas devoid 



of photophores galaxias 



8. Mantle photophores not in rows, photo- 

 phores scattered higginsi 



8. Six longitudinal photophore rows sepa- 

 rated by narrow space 9 



732 



