8 EICHARDSOX — FjUR XEW SPECIES OF ROCINELA. [Jau. 21, 



" Description of Four Xew Species of Rocinela, with a 

 Synopsis of the Genus," by Miss Harriet Eicharclson. 



" An Old Broadside, with a Keference to the Throne of 

 Congress," by Mr. Julius F. Sachse, which was discussed by 

 Messrs. McKean, Kosengarten, Ilildeburn and Sellers. 



The meeting was adjourned by the presiding officer. 



DESCRIPTION OF FOUR NEW SPECIES OF ROCINELA, 

 WITH A SYNOPSIS OF THE GENUS. 



BY HARRIET RICHARDSON. 



{Uead January 21, 1898.) 

 I. 



The species of Rocinela here described were collected by the 

 steamer Albatross, of the U. S. Fish Commission, during its various 

 cruises in different localities. One of the species herein described 

 comes from the Alaskan coast ; another is from the coast of Cuba, off 

 Havana, and the third comes from the southern part of the Gulf of 

 California. 



The new species exhibit unique characters not found in any other 

 representatives. One, R. cormita, has the antero-lateral angles of 

 the first thoracic segment extended forward on each side of the 

 eyes, but not touching them, thus giving the head the appearance 

 of being immersed or deeply set in this segment. Another, 

 R. tuberculosa, presents a row of small tubercles on the posterior 

 margin of each one of the thoracic and abdominal segments of the 

 body. In R. cubensis, the frontal margin of the head is greatly pro- 

 duced into a large rounded process with a concave surface. 



The genus Rocinela is now known to include nineteen species,^ 

 of which nine were included in the monograph published in i88o 



' A*, lilljeborgii Bovallius {Bihang Sv. Ak. Hand!., 1 885, Vol. x, No, lo, 

 pp. 3-10, Pis, I, 2) has been referred to the genus Syscenus Harger, and identi- 

 fied with S. injlexisy Harger's type species (G. O. Sars, "An Account of Ihe 

 Crustacea of Norway," Vol. ii, Isopoda, Pis. in, iv, pp. 67, 68). 



