rsoi'ODS OF NORTH AMERICA. 



201 



;ire I'oiind; tlioso of tlio last (lii'oe are acute. A faint carina crosses 

 (lie cpiincra oltrKiuely. 



The first seonuMit of the ahdonieii is eiitiivly concealed by tiie last 

 thoracic seoinent, so that thei-e is no trace of it whatever on the doi'sai 

 side. The hitei-al ])arts of tlie segments are not distinct from the 

 dorsal portion. Tlie last segment is widely rounded posteriorly with 

 margin faintly crenulate. The uropoda are alike in shape, being long 

 and nari"ow with posterior margins rounded, oar-liki*; tht; innei' branch 

 is a little longer than the outei' l)ranch and does not extend beyond 

 the extremity of the terminal abdominal segmcMit; the branches are 

 equally wide. The basal segment of the uropoda extends as far as the 

 end of the outer branch, and nearly to the end of the innei' bi-anch. 



The first three pairs of legs are prehensile; the last four pairs ambula- 

 tory. There are three spines on the merus and three on the propodus 

 of the first three pairs of legs. 



The lateral parts of the second, third, fourth, and fifth segments of 

 the abdomen and the base of the sixth or terminal segment are marked 

 with black. 



ROCINELA AMERICANA SchicEdte and Meinert. 



Rodnela americana Schkedte and Meinekt, Naturfiistori.sk Tidsskrift (3), XII, 

 f879-1880, pp. 394-395, pi. xii, figs. 16-18.— H.arger, Bull. Museum Com]). 

 Zool., Harvard College, XI, 1883, No. 4, pp. 98-99, pi. iv, figs. 3, 3a, 4; 

 pi. IV, tigs. 2-2a. — Richardson, American Naturalist, XXXIV, 1900, p. 219; 

 Proc. r. S. Nat. Mus., XXIII, 1901, \^. 524. 



Localities. — Trenton, Maine; latitude 40 

 2' 54" north, longitude To ;^3' 40" west; lati- 

 tude 40'^ north, 

 longitude 70' 57' 

 west; latitude 

 39" 57' north, 

 longitude 70'-' 57' 

 30" west; lati- 

 tude 37° 25' 

 north, longitude 

 74° 18' west; 

 latitude 40° 2' 

 north, longi- 

 tude 70° 37' 30" 

 west. 



Depth. —85- 

 157 fathoms. 



Body ovate, a little more than twice as long as broad, H nun. : 20 mm. 



Head twice as wide as long, 2 mm. : 4 nnn.; triangular in .shape, 



with the front produced over the basal articles of the antenn;e. Eyes 



Fig. 193.— Kocinela americana 

 (After Schiiedte and Mein- 

 ert). ((, Frontal margin with 



BOTH ANTENN.E AND FRONTAL 

 LAMINA. h, YOI'Nc; FEMALE. 



(Enlarged. I 



Fig. 194. — Rocixei.a americana. n. 

 Second LE(i. x lU. h, Ma.xilliped. 

 X 39. 



