144 



BLTLLP:TIN 54, UNITED STATES NATIONAL MUSEUM. 



head of the male. The basal joints of the tirst antennae of the female 

 are large and dilated, but without the prominent spine character- 

 istie of the male. 



The tirst thoracic segment in the male is ornamented 

 with two small tubercles situated close together on 

 the anterior portion. These tubercles are wanting 

 in the female. The posterior segments of the thorax 

 and the abdominal segments are densely tubercular. 



The terminal segment of the 

 l)ody is pointed pDsteriorly, and 

 fringed with hairs. The uropoda 

 are about a> long as the terminal 



Fig. 124.— Exocorali.ana 



SEXTICORNIS. a, Max- 

 ILLIPED. •; 39. h. Man- 

 dible. •' 39. 



Fig. 125.— Exocorallana 



SEXTICORNIS. Head AND 

 FIRST thoracic SEG- 

 MENT. 



Fig. 126.— Exocorallana 

 SEXTICORNIS. Mandi- 

 ble. X 51|. 



segment, the outer branch narrow, the inner branch wide; both are 

 fringed with hairs and armed with a few spines. 



One male and a number of females were collected by Henry Hemp- 

 hill at Key West, Florida. 



Ti/j)e.— Cat. No. 13540, U.S.N.M. 



EXOCORALLANA QUADRICORNIS (Hansen). 



Corallaii(( quadrlcoriils Hansen, Vidensk. Selsk. Skr. (6), V, 1890, p. 382, pi. 

 VII, tig. 3.— Richardson, Proc. U. S. Nat. Mus., XXIII, 1901, j). 518; Trans. 

 Conn. Acad. Sci., XI, 1902, 290. 



Localities. — St. lliomas, West Indies; Bermudas, at the Flatts; at 

 Long Bird Islantl in i\w cavities of a massive, Wack keratose sponge, 



living on the grassy sand flats at low tide; 

 Castle Harbor, in the same sponge. 



This species is very similar to E. fricor- 

 nis, but differs in. the following important 

 characters: The clypeus, seen from below, 

 is very narrow and concealed, for the most 

 part; the labrum is concealed by the man- 

 dibles. Half of the distal part of the 

 mandibles is very prominent and o])scurely trifid. The last segment 

 of th(», abdomen is a little more impressed at the sides than in E. tricor- 

 nis. The al)domen is less hairy, the apical part of the last segment 

 less convex, ornamented, however, with four apical spines. 



Fig. 127.— Exocorallana quadri- 

 coRNis (After Hansen). Head. 

 (Enlarged.) 



