368 



BULLETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



Remarks. — The projecting prominence on the dorsal midline of the 

 fourth segment is the most prominent character of the present species 

 and is very distinct in these preserved specimens. Giesbrecht said 

 that the caudal rami were at least twice as long as wide in the 

 Mediterranean specimens ; in these American specimens the length is 

 nearly three times the width, Rathbun's specimens were collected 

 long before those on which Giesbrecht established the species and 

 are the first to be reported outside of the Mediterranean. 



SAPPHIRINA GEMMA Dana 



FlGtTBB 224 



Sapphirina gemma Dana, United States Exploring Expedition, 1838-1842 



(Wilkes), vol. 14, Crustacea, p. 1252, 1853, pi. 88, figs. 1, 2, 1855.— Gibs- 



BEECHT, Fauna und Flora des Golfes von Neapel, vol. 19, p. 618, pis. 3, 

 52-54, 1892. 



Occurrence. — Both sexes were taken in surface tows at Stations 949, 

 1107, 1108, Fish Hawk, south of Marthas Vineyard ; eight males were 

 captured in a surface tow in Vineyard Sound, August 5, 1871. 



Figure 224. — Sapphirina gemma: a. Female, dorsal ; i, female, second antenna ; c, 

 female, fourth leg. (From W. M. Wheeler.) d, Male, dorsal 



Distribution. — New Zealand (Dana) ; Gulf of Guinea (Lubbock) ; 

 Nizza, Messina, Naples (Glaus) ; Malta (Thompson) ; Mediterra- 

 nean, tropical Atlantic (Giesbrecht) ; Adriatic (Steuer, Pesta) ; North 

 and South Atlantic (Brady) ; Arabian Sea (Cleve) ; Chesapeake Bay 

 (Wilson) ; Gulf Stream south of Nantucket (Wheeler). 



Color. — Body of female dark gray with scattered red dots along 

 the lateral margins of the entire body, interspersed with a few black 

 dots; ovaries, oviducts, and ovisacs a deep greenish blue, the two 



