ISOPODS OF NORTH AMERICA. 



175 



WEBBII (Guerin). 



Pterelas webbii GUERIN, Mag. Zool., Cl. VII, 1836, pi. xx, figs. la-e. MILNE 

 EDWARDS, Hist. Nat. Crust., Ill, 1840, p. 245. 



webbii SCHKEDTE and MEINERT, Naturh. Tidssk. (3), XII, 1879-80, pp. 

 347-348, pi. x, figs. 1-i. 



a webbii HARGER, Bull. Mus. Comp. Zool., Harvard College, 1883, XI, No. 

 4, p. 95. RICHARDSON, American Naturalist, XXXIV, 1900, p. 218; Proc. 

 U. S. Nat. Mus., XXIII, 1901, p. 522. 



Localities. Off Fernandina, Florida; latitude 31 57' north, longi- 

 tude 78 18' 35" west (Harger); also Cape of Good Hope; Portugal. 

 Depth. 333 fathoms. 



Body oblong-ovate, twice as long as wide, 8 mm. : 16 mm. 

 Head twice as wide as long, 2 mm. : 4 mm. Anterior margin widely 



FlG. 156. JEGA. WEBBII (AFTER 



SCHKEDTE AND MEINERT). a, 

 FRONTAL MABGIN WITH BOTH 

 PAIRS OF ANTENNAE AND FRONTAL 

 LAMINA, ft, ADULT MALE. (EN- 

 LARGED.) 



FIG. 157. ^EGA WEBBII. a, MAXILLIPED. x61f. 



ft, LEG OF THE SECOND PAIR. X 15}. 



rounded and produced in a small median point, which does not arch 

 over the antennge to meet the frontal lamina on the other side. Eyes 

 large, oval, composite, not contiguous, and separated in front by a 

 distance equal to the width of one eye. The first pair of antennae 

 have the two basal articles large and dilated, the first one being a little 

 longer and wider than the second one; the second article has the outer 

 distal end produced in a process which extends about half the length 

 of the third article; the third article is about as long and half as wide 

 as the basal article. The flagellum is composed of eight articles. The 

 first antennae reach the end of the peduncle of the second antennae, but 

 do not extend to the posterior margin of the head. The second pair 

 of antennge have the first three articles about equal in length; the 

 fourth article is a little more than twice as long as the third; the fifth 

 is just a little longer than the fourth. The flagellum is composed of 



