176 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



The maxillipeds have the second, third, and fourth articles of the 

 palp produced into lobes or processes. The mandibles have no mas- 

 ticatory process; the cutting edge is provided with four large blunt 



Fig. 2. — Ancinus dbpkessds. Fig. 3. — Ancinus depressus. Man- 



Maxilliped. X 77J. dible. X llh 



teeth; below the cutting edge is a process provided at the tip with 

 three teeth ; below this process is a long spine. 



The first two segments of the thorax appear to be a little shorter 

 than those following, which are subequal in length. All are of nearly 



Fig. 4. — Ancinus depressus. First Fig. 5. — A n c i n u s Fig. 6. — A ncinus 



PAIR OF LEGS OF FEMALE. X 77*. DEPRESSUS. FIRST DEPRESSUS. THIRD 



AND SECOND PLEO- PLEOPOD. X 41. 

 POD. X 41. 



equal width, the sides of the body being almost parallel. With the 

 exception of the first, the epimera of all the segments are distinctly 

 separated ; they are broad, quadrangular plates with the post-lateral 



