96 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



thirds the length of the third, and the fifth is nearly subequal to the 

 fourth ; the sixth segment is about as long as the third, with the post- 

 lateral margin excavate for the reception of the uropod peduncle ; the 

 telson is one and three-fifths times the length of the sixth segment; 

 the distal margin is evenly rounded, a small tooth at each angle ; the 

 uropod peduncle is small, cut into two triangular points distally; the 

 inner blade is as long as the telson and about as wide distally, with 

 the distal margin shallowly rounded, and a small tooth at the outer 

 distal angle; the outer blade is slightly longer and wider than the 

 inner, with the distal margin more convex, the distal article of the 

 blade separately articulated for five-sixths of its width. The distal 

 margins of the entire caudal fan are fringed with short setae, as are 

 also the posterior margins of the carapace and abdominal segments. 



The antennulae are short, the first article excavate beneath the eye ; 

 the second and third articles short, subequal; the flagella short, the 

 outer whip thicker than the inner. 



The antennae have the first, second and third articles rather coarse, 

 nearly as broad as long ; the first article with a spine at the outer 

 distal angle; the flagellum is nearly two-thirds as long as the body 

 and is composed of thick, coarse rings ; the scaphocerite is very small, 

 the distal tooth reaching to midway the third peduncular joint; the 

 blade is short and rounded, only as long as the second joint. 



The eye is short, bulbous, black. 



The first legs are large, unequal, slightly dissimilar in shape ; the 

 merus is short, triquetral, armed with a spine at each distal angle; 

 the carpus is short, with several spines on the upper surface ; the 

 propodus is long, ovate, usuallj^ with a row of spines on the inner lat- 

 eral margin of the palm. The fingers are ivllj as long as the palm, 

 the hinged finger much slenderer than the broad lower finger, both set 

 with coarse teeth on the large claw and smaller teeth in the lesser 

 claw. The second and third legs are small, chelate. 



The second and third legs are small, chelate. 



The fourth and fifth legs are monodactyl, successively shorter than 

 the others ; the dactyli stocky, with sharp nail at the tip. 

 Synonymy. — Homarus americanus H. Milne Edwaeds, Hist. Nat. 

 Crust., II, p. 334, 1837.— DeKay, N. Y. Fauna, Crust., vol. VI, p. 

 23, pi. 12, figs. 52-53, 1844.— S. I. Smith, Trans. Conn. Acad. 

 Arts and Sci., vol. 2, p. 251, pis. 1-5, 1870. — Verrill, A. E., Eept. 

 U. S. Fish. Comm., vol. I, p. 395, 1871-72 ; also p. 522, pi. 9, figs. 

 38-39, issued 1873.— S. I. Smith, idem., pp. 522 and 549.— Kings- 



