STALK-EYED CRUSTACEA 165 



which separate the lobes are deep, smooth, and very 

 wide. In front the lobes are ornamented with granula- 

 tions which project through the down. The front is 

 formed of rounded and very granular lobes. The orbital 

 borders have granulations. The antero-lateral borders 

 have thin spiniform and granular teeth without counting 

 the orbital angle, which is not prominent. The sub- 

 hepatic tooth is tubercular and of a raspberry appearance. 

 The basal antennal joint is smooth. The first pair of 

 legs strong, short, thick, and of unequal size. The fifth 

 joint is covered above with tubercles, forming groups, 

 arranged in transverse series, especially on the outer 

 side ; the hand has above and outside perliform tubercles, 

 which project through the downy covering. The walking 

 legs have long and short hairs ; they are short and strong, 

 and have sometimes, on their superior border, spiniform 

 granulations. 



The carapace of the male is thicker and flatter than 

 that of the female. 



Range. — Bermuda, Florida. 



19. Heteractaea. 



Hctcractcea ... A. Milne Edwards, Lockington. 



Is a Piluniniis in the form of XantJio, with the 

 carapace slightly curved. The front terminates in a 

 straight and thick edge ; the orbital borders are unarmed 

 above and below ; the antero-lateral edges of the cara- 

 pace are spiny ; the fifth joint of the walking legs have, 

 above, a raised crest in the form of a horn. 



The abdomen of the male has five joints. 



Range. — Atlantic and Pacific Oceans, on both sides 

 of America. 



