80 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



uient is abruptly narrower than the sixth, and is likewise somewhat 

 narrower than the abdominal segments. 



The terminal segment of the body is linguiform, the posterior mar- 

 gin evenly rounded and smooth. The inner branch of the uropoda is 

 likewise rounded posteriorly with a smooth margin. The outer and 

 superior branch arches over the telson. Both branches, as well as the 

 terminal abdominal segment, are fringed with hairs. 



The first pair of legs are subcheliform, the propodus unarmed. The 

 second and third pairs are also sul)cheliform, ])ut smaller, with the pro- 

 podus armed on the posterior margin with live spines. The three 



Fig. 64.— Colanthura tenuis, a, General figure, b, Head and antknn.e. c, Leg of first 

 PAIR, d, Lateral" view of uropoda. e, Leg of second pair. /, Abdomen and last two 

 thoracic segments. 



following pairs of legs are ambulatory in character. The seventh 

 pair are wanting. 



Two specimens were collected by Prof. A. K. Verrill and part}" at the 

 Bermudas in 1898. Both specimens are adult females, the marsupium 

 in one being very large and extending the entire length of the thorax, 

 from the .second segment. 



Type specimen in Peabod}' Museum, Yale University. Cat. No. 

 3252. 



