92 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



the posterior portion of the segment, and has the posterior edge 

 sharply defined. This carina is in the form of three lobes, two lateral 

 lobes and a median lobe, which is truncate. 



The first three pairs of legs are short and prehensile; the four fol- 

 lowing pairs are ambulatory and densel}^ spinulose. 



Two specimens, both females, w^ere collected at San Francisco, Cal- 

 ifornia, by Mr. T. G. Cary, jr. They were found in dead Illppa. 

 The types are in the Museum of Comparative Zoology, Harvard 

 University. Cat. No. 1621. M. C. Z. 



This species is named for Prof. Charles Chilton, the distinguished 

 carcinologist. 



CIROLANA MINUTA Hansen. 



Cirolana minuta Hansen, Vidensk. Selsk. Skr. (6), V, 1890, pp. 347-348, pi. iii, 

 figs. 5-5d; pi. IV, figs. 1-lf.— Richardson, Proc. U. S. Nat. Mus., XXIII, 

 1901, p. 512.— Stebbing, Willey's Zool. Results, 1902, p. 634. 



Localities. — St. Thomas, West Indies; also Lifu, Lo3'alty Islands 

 (Stebbing). 



Body oblong-ovate, about two and a third times longer than wide, 

 somewhat convex. 



The head is formed almost as in C. parva. 



The e^'es are moderately large, larger than in other species, brown- 

 ish, almost wider than long, the ocelli rather numerous, somewhat 

 convex. 



The frontal lamina is about two and a half times longer than wide, 

 oblong-pentagonal, or almost hexagonal, with the apex anteriorly 

 truncate, the basal part furnished with a moderately large acuminate 

 tubercle. The clypeus is small, much shorter than the labrum. 



The first pair of antennae are somewhat elongate, extending some- 

 what l)eyond the peduncle of the second pair of antenna^; the peduncle 

 is a little longer than the flagellum, and is composed of two articles; 

 the flagellum is slender and is composed of seven articles. 



The second pair of antenna^ do not extend quite to the posterior 

 margin of the fourth thoracic segment; the peduncle is slender, with 

 the fourth article almost twice as long as the third article, and a little 

 shorter than the fifth article; the flagellum is composed of seventeen 

 or eighteen articles. 



The mandil)les have the cutting edge partly concealed by the labrum, 

 seen at first rather narrow. 



The maxillipeds ai-e short, with the fifth article largest, wider than 

 long, somewhat larger than both of the last articles. 



The segments of the thorax are almost as in C jxirva. 



The epimera are moderately large, diflering a little in size, and fur- 

 nished with the two usual furcie; the posterior epimera are a little 

 produced posteriorly, with apex acute. 



