480 Dr. H. J. Hansen on a new S/Jccies of Scrgcstcs. 



but the last-named fonii differs from S. inennis in the following 

 particulars: — The body is stouter; the rostrum (fig. 6) is 

 longer^ directed more upwards, and distally of another shape. 

 The eyes are larger, seen from the side (fig. 6) they are much 



Fig. 1. (X 9.) 



Fi' 



(X 9.) 



Fig. 3. (X 12.) 



Fig. 5. (X 6.) 



Fig. 4. (X 12.) 



Fig. 6. (X 5.) 



Fig. 7. (X 6.) 



Figs. 1-5. Sergestes inennis, sp. n. Figs. 6 & 7. Seiyesies robustus, Smith. 



longer than the upper margin of the distal joint of their 

 stalks. The joints of the peduncles of the autennulse are 

 considerably thicker in proportion to their length. The 

 three posterior branchiae are longer (comp. fig. 6 on pL xx. 

 in Smith, Report Decap. Crustacea, Rep. U.S. Comm. Fish 

 and Fisheries for 1885). The fifth pair of legs are of the same 



