84 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



f. Eyes large, brown, as long an wide. Branches of uropoda short; inner 

 branch hardly twice as long as wide. Clypeus with margin raised all 

 around and with a median rib, surrounding two impressed areas. 

 Terminal segment truncated obliquely with apex acute. 



Cirolana gracilis Hansen 

 df. Frontal lamina broad, short, scarcely twice as long as wide. 



e. Terminal segment truncate Cirolana obtnmcata Richardson 



e' '. Terminal segment not truncate, rounded. 



/. Posterior margin of terminal abdominal segment armed with numerous 

 (twenty -six) robust spines. Inner branch of uropoda with outer post- 

 lateral angle rounded Cirolana harfordi ( Lockington ) 



f '. Posterior margin of terminal abdominal segment armed with a few 

 (about eight) small spines. Inner branch of uropoda with outer post- 

 lateral^mgle acute. 



g. Body two and two-thirds times longer than wide. Second pair of 

 antennae extend to posterior margin of the fourth thoracic segment. 



Color light brown Cirolana parva Hansen 



g'. Body three and two-thirds times longer than wide. Second pair of 

 antennae extend to the posterior margin of the third thoracic seg- 

 ment. Color white Cirolana albida Richardson 



a'. Eyes wanting Cirolana cubensis Hay 



CIROLANA SPH^EROMIFORMIS Hansen. 



Cirolana sphseromiformis HANSEN, Vidensk. Selsk. Skr. (6), V, 1890, pp. 351-353, 

 pi. iv, figs. 3-3g. RICHARDSON, Proc. U. S. Nat. Mus., XXIII, 1901, p. 512. 



Locality. St. Thomas, West Indies. 



Body short, subovate, twice as long as wide, rather convex. 



Head forming at the sides a prominent angle, produced in front in 

 a rather- narrow but long frontal process, the margin between the 

 lateral angle and the base of the frontal process being rather straight, 

 forming a manifest carina on the surface of the head. 



Eyes very small, appearing only on the superior margin of the head 

 in an angulated process, formed of a few, rather convex ocelli. 



The frontal lamina is exceedingly narrow at the basal part, is partly 

 concealed under the end of the clypeus, becomes exceedingly dilated 

 toward the apex, which is inflated and widely rounded, and later 

 somewhat overhangs the frontal process and becomes united with that 

 process. 



The clypeus is very short, produced at the base in a very short, acute 

 point. The first pair of antenn* are somewhat shorter than the pedun- 

 cle of the second pair of antennae; the peduncle is twice as long as the 

 flagellum, and composed of three articles, the basal article being short; 

 the flagellum is composed of about four articles, with the basal article 

 elongate, the last three articles being very minute. 



The second pair of antennae extend a little beyond the posterior mar- 

 gin of the second thoracic segment; the peduncle is stout, with the 

 fourth article much longer than the third article and somewhat shorter 

 than the fifth article; the flagellum is composed of about twelve articles. 



