364 BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



MALES 



1. Third and fourth metasome segments as wide as head or wider ; 



corneal lenses not visible in dorsal view 2 



Third and fourth metasome segments definitely narrower than 

 head ; corneal lenses visible in dorsal view 4 



2. Endopod of fourth leg a little shorter than exopod ; end segment 



only three-fourths as long as two basal segments together, angusta (p. 364) 

 Endopod of fourth leg a little longer than exopod ; end segment 

 fully as long as two basal segments together 3 



3. Third and fourth segments of second antenna together half as 



long as second segment; apical claw half as long as fourth 



segment ovatolanceolata (p, 369) 



Third and fourth segments of second antenna together two-thirds 

 as long as second segment ; apical claw one-third as long as 

 fourth segment gemma (p. 368) 



4. Head twice as wide as long or more ; caudal rami one-half 



longer than wide or less 5 



Head one-half wider than long or less ; caudal rami twice as 

 long as wide or more 6 



5. Second antennae stout, fourth segment two and a half times 



as long as the third, the two together longer than second 



segment scarlata (p. 371) 



Second antennae slender, fourth segment four times as long as 



third, the two together as long as second segment- nigromaculata (p. 372) 



6. Caudal rami one-fourth longer than wide ; first antennae less 



than half as long as second pair auronitens (p. 365) 



Caudal rami three times as long as wide ; first antennae three- 

 fourths as long as second pair pyrosomatis (p. 366) 



SAPPHIRINA ANGUSTA Dana 

 FiGUBB 221 



Sapphirina angusta Dana, United States Exploring Exi^edition, 1838-1842 

 (Wilkes), vol. 14, Crustacea, p. 1240, 1853, pi. 87, fig. 3, 1855.— Giesbrecht, 

 Fauna und Flora des Golfes Von Neapel, vol. 19, p. 619, pi. 52, 53, 54, 1892. 



Occurrence. — Both sexes taken in surface tow at Station 1107, 

 Fish Hawk, Gulf Stream south of Nantucket. 



Distribution. — Kerguelen Islands (Dana) ; tropical Atlantic 

 (Lubbock) ; Messina, Madagascar, coast of Argentina (Brady) ; 

 Malta (Thompson) ; Mediterranean, Hawaiian Islands (Giesbrecht) ; 

 Adriatic (Steuer, Pesta) ; California coast (Esterly) ; Malay 

 Archipelago (A. Scott). 



Color. — Body of female almost colorless and semitransparent ; 

 ovaries, oviducts, and ovisacs bluish; digestive canal faintly bluish, 

 the color deeper in the anterior portion; young females almost per- 

 fectly transparent and colorless; males brilliantly iridescent 

 (Kathbun). 



Female. — Head one-half longer than wide, narrowed anteriorly, 

 the entire anterior end occupied by the corneal lenses ; urosome one- 

 third the length of the metasome; caudal rami twice as long as wide, 



