98 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



point. The eyes are small, composite, and situated in the antero- 

 lateral angles of the head. The first two articles of the first pair of 

 antennte are short and snbeqiial; the third article is as long- as the 

 first two taken tog-ether. The fiagellum is composed of twelve short 

 articles. The first antenna? extend to the antero-lateral angles of the 

 first thoracic segment or to the end of the peduncle of the second pair 

 of antenna?. The first two articles of the second antenna^ are short 

 and subequal; the third and fourth articles are subequal and each is as 

 long as the first two taken together; the fifth is only a little longer 

 than the fourth. The ilagellum is composed of twenty articles. The 

 second antenna? extend to the posterior margin of the second thoracic 

 segment. The maxilliped is composed of seven articles. The palp of 

 the mandibles is composed of three articles. The frontal lamina is 

 narrow, elongate, and has the anterior margin rounded. 



The first segment of the thorax is 2i mm. long, and is longer than 

 any of the following segments. The second and third are subequal, 



Pig. 79.— Cirolana i.mpre.ssa. a, Maxilliped. < 15|. !>, First maxilla, x 15^ c, Frontal lam- 

 ina. X 27|. (/, Mandible, x 15j. r, Second maxilla, x 15}. 



each being 1^ mm. long. The fourth, fifth, and sixth are subequal, 

 being 2 mm. in length, and each a little longer than either the second 

 or third segments. The seventh segment is li nmi. long. The epimera 

 are distinct, separated on all the segments with the exception of the 

 first. The first four have the outer post-lateral angles rounded; the 

 last two have the outer post-lateral angles acutely produced })e3'ond 

 the posterior margins of the segments. There is a carina on all 

 the epimera. 



The first segment of the a))domcn is entirel}' covered by the seventh 

 thoracic segment. The sixth or terminal segment is rounded posteri- 

 orly and has the posterior margin cretui'ate and furnished with spines. 

 The uropoda are as long as the terminal segment. The inner branch 

 is a little longer than the outei" branch, is emarginate on the exterior 

 margin near the extremity and has one long spine in the emargination, 

 and four long ones on the posterior margin; the exterior and posterior 

 margins are crenulate. Below the emargination the inner branch is 



