444 STALK-EYED CRUSTACEA 



Family II. Homaridae. 



Homaridxe . . Spence Bate, Dana, Bell. 



Cephalon subcylindrical. Carapace anteriorly ros- 

 trated, posteriorly produced over the anterior half of the 

 first abdominal segment, but not kept down by a tubercle. 

 Rostrum narrow, armed with many teeth. The abdominal 

 segments overlap each other. The legs are seven-jointed ; 

 the anterior three pairs have pincers, the first pair the 

 largest. Swimming organ well developed ; outer branch 

 has no division. 



Synoj'Sis of the Genera. 



A. A basal scale on external antenna;. — {Phohenis^ 



B. No basal scale on external antennae. — {Nephropsis^ 



I. Phoberus. 



Phoberus . . A. Milne Edwards, Spence Bate. 



Carapace slightly compressed laterally, armed an- 

 teriorly with a long and narrow rostrum furnished with 

 lateral teeth. Abdomen laterally compressed ; swimming 

 organ well developed, outer branch of the posterior pair 

 of appendages having a well-marked division. Terminal 

 segment quadrate, with terminal angles slightly rounded. 

 Eyes small, close together, implanted on short rudimentary 

 stalks. The internal antennae short, terminating in two 

 long, slender, subequal flagella. The external antenna; 

 have a large basal scale, of which the outer margin is pro- 

 duced to an acute point. 



The first pair of legs long, slender ; the second and 

 third pair are slightly shorter and much more slender; 

 fourth pair simple ; the fifth pair has the inner distal 

 angle of the sixth joint produced. Gills attached as in 



