14 



EICHARDSON — FOUR NEW SPECIES OF ROCINELA. [Jan. 21, 



Fig. 5. — Head X 2i. 



Type. — The type specimen was found off Havana, lat. N. 23° 

 11', long. W. 82° 19^ 6", Station 2341, 143 fathoms (U. S. Nat. 

 Mus., No. 20087). 

 Rocinela laticauda, Hansen^ Fig. 5, 6. 



Head, with a median projection, long and broad, extending 

 slightly downward and having a blunt extremity. 

 Eyes large, with ten rows of ocelli. The first an- 

 tenna, with a flagellum containing six articles, 

 reaches the posterior margin of the head. The 

 second antenna extends to the middle of the 

 second thoracic segment; its flagellum contains 

 fifteen articles. 

 The thoracic segments are equal in length. The first is deeply bi- 

 sinuated, its antero-lateral angles extending 

 up the side of the head to about the middle of 

 the eyes. The epimera of the second, third 

 and fourth segments are rounded posteriorly; 

 those of the remaining segments have pointed 

 extremities. 



The first segment of the abdomen is almost 

 entirely covered by the last thoracic segment. 

 The fifth segment, as well as this one, is nar- 

 rower than the intervening segments, and not 

 as broad as the base of the terminal segment. 

 The last segment is widely rounded posteri- 

 orly and is fringed with rough hairs which 

 almost conceal its crenulated margin ; at the 

 base it is impressed on either side of a keeled 

 centre ; the outer branch of the uropods is 

 almost twice as broad as the inner branch ; 

 they are about equal in length. Both are 

 fringed with hairs and indistinctly crenulate. 

 Fig. d.—a. Rocinela la- The prehensile legs are stout and short. 

 ticauda, ^, slightly There are four spines on the propodus and 

 reduced, b. Leg of first f][yg qj^ ^\^q merus, besides numerous hairs. 



I ''^4- ^- ^g o The gressorial lesrs are likewise stout and fur- 

 fourth pair, X 4. • u ^ -.1 • ^ u • 



nished with spmes and hairs. 



1 he description of the above species was written and the drawings made 

 when Dr. Hansen's type specimen was returned to the U. S. Nat. Mus., and his 

 manuscript sent to the press. As there are a few differences in the specimens, it 

 was thought best to publish the new description. 



