244 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



on all the segments of the thorax with the exception of the first and 

 the seventh. There are two pairs of epimera on the fourth thoracic 

 segment and two pairs of legs are attached to this segment. The 

 seventh segment has no appendages. 



Abdomen continuous with thorax, not narrower than thorax; deeply 

 immersed. Carina on the four posterior pairs of legs moderately 

 high. 



AGARNA CARINATA Schicedte and Meinert. 



Agarna carinata, SCHKEDTE and MEINERT, Naturhistorisk Tidsskrift (3), XIV, 

 1883-84, pp. 329-334,- pi. xm, figs. 1-3. RICHARDSON, Proc. U. S. Nat. 

 Mus., XXIII, 1901, p. 531. 



Localities. St. Croix Island, West Indies; Key West, Florida. 



Found on Teuthis chirurgus. 



Body very asymmetrical, with the last four thoracic segments on 



one side abruptly ver}^ 

 much wider than the first 

 three. Body twisted to 

 one side, which is shorter 

 than the other side, twice 

 as long as its width above 

 the fourth thoracic seg- 

 ment, 9 mm. : 18 mm. 

 At the fourth and fifth 

 thoracic segments it is 11 

 mm. wide. The body is 

 also very much hunched, 

 rising very high, until 

 at the third and fourth 

 / segment it is 7 mm. high. 

 The head is wider than 

 long, "2 mm.: 3 mm., 

 somewhat rectangular, 

 with the anterior margin 

 widely rounded. The 



FIG. 253. AGAENA CARINATA (AFTER SCHICEDTE AND MEIN- eyes are Small 1'OUnd 

 EKT). a, LATERAL VIEW OF ADULT FEMALE (LEFT SIDE), b, 



YOUNG OF THE FIRST STAGE. C, LATERAL VIEW OF ADULT COHlpOSlte and 



FEMALE (RIGHT SIDE), d, ADULT MALE, e, ADULT FEMALE. /, in the post-lateral 

 LATERAL VIEW OF THORAX OF ADULT MALE. (ALL ENLARGED.) 



of the head. The first 



pair of antennae are composed of seven articles. The basal articles are 

 almost contiguous. The second pair of antennae are composed of "ten" 

 articles. The head is deeply set in the first thoracic segment, the 

 antero-lateral angles of which extend to the anterior margin of the 

 head. The maxilliped has a palp of two articles. The palp of the 

 mandibles is composed of three articles. 

 The first, second, and third thoracic segments are equal in length, 



