464 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



Family LEKNiEOPODID^E. 



• BRACHIELLA MALLEUS Rudolphi. 



Brachiclla malleus Vogt, 1S77, p. 46, pi. in, figs. 1 to 8; pi. iv, fig. 1. 



Host and record of specimens. — A single lot taken at Port Arthur 

 by J. F. Abbott and sent to the author from Stanford University by 

 Dr. C. H. Gilbert. There are no data as to the host. The lot is Cat. 

 No. 38578, U.S.N.M. 



BRACHIELLA GRACILIS, new species. 



Plate LXXVII. 



Host and record of specimens. — A lot containing both sexes and 

 several development stages was taken by Doctor McClendon from the 

 mouth of the white sea bass. Gynoscion nobilis, at La Jolla, Califor- 

 nia. These are made the types of the new species and are Cat. No. 

 38577, U.S.N.M. 



Female. — General body form elongate and slender; head, includ- 

 ing the first maxillipeds, considerably enlarged and club-shaped. 

 Space between the first and second maxillipeds occupied by a narrow 

 cylindrical neck, two-thirds as long as the rest of the body. Second 

 maxillipeds slender and longer than the head and neck, placed closely 

 side by side and held together by the outer skin but not fused; this 

 outer skin is wrinkled into transverse folds. The base of each maxilli- 

 ped where it joins the body is enlarged to form a prominent knob, 

 which projects considerably from the surface. From these knobs the 

 maxillipeds taper gradually toward their tips, -where they are thor- 

 oughly fused and furnished with an attachment disk in the shape of 

 a mushroom. The head and neck are bent backward at the base of the 

 second maxillipeds so as to form an acute angle with the rest of the 

 body. Both are curved so that the two together form a smoothly 

 arched half -moon or semioval. 



The body below the base of the second maxillipeds is again con-i 

 stricted for a short distance to about the diameter of the neck. It 

 then broadens abruptly into the genital portion, which has the shape 

 of a tall bottle or elongated flask, the sides nearly parallel and the 

 posterior margin squarely truncated. From this posterior margin 

 project four slender, finger-like processes in two pairs, one ventral 

 and one dorsal. The ventral and dorsal process on either side curve 

 in toward each other like unequal parentheses marks, the dorsal 

 process being only three-fifths as long as the ventral. The latter! 

 pair are as long as the entire body posterior to the base of the second 

 maxillipeds. All four processes are slightly enlarged at their bases 

 and taper gradually toward their tips which are bluntly rounded. 

 Between the ventral processes lies the abdomen, which is cylindrical, 



