no.1653. PACIFIC C0A81 C0PEP0D8 WILSON. p;; 



BRACHIELLA ANSERINA, new species. 



Plates LXXVIII, LXXIX. 



Host and record of specimens. AJbout a dozen specimens, includ- 

 ing both sexes, were taken from the gills of the rockfish, Sebastodes 

 glattcus, at Bering [sland, Siberia, by ( rovernor N. < rrebnitzky. They 

 art- made the types of the new species and are Cat. No. L3685, 

 Q.S.N.M. 



Female. — Body elongate, the long and stout neck passing insen 

 sibly into the genital portion. Head not much enlarged, the anterior 

 margin almost squarely truncated, the posterior margin well rounded. 

 Neck thick and muscular, considerably longer than the body, gradu 

 ally increasing in size as it passes toward the body, until at the base 

 of the second maxillipeds the two join almost insensibly. 



Second maxillipeds very short and Battened on the inner sides 



where they c e together, giving each the shape of quarter of a 



sphere, one of the flat sides being attached t<> the body and the other 

 facing it- fellow on the other maxilliped. Between them and almost 

 in contact with the ventral surface of the body is the small attach- 

 ment India. This has a very -hurt petiole and a nearly spherical 

 umbrella. 



Genital portion or body proper nearly quadrilateral in dorsal out 

 line, slightly widened posteriorly, and flattened dorso-ventrally, so 

 that it- thickness is three-fifth- of its width. This genital portion 

 terminates posteriorly in eight processes arranged in four pairs; one 

 pair at the ventral corner-, which are mere knobs and project but 

 little, a second pair at the dorsal corner-, considerably larger and in 

 the form of conical processes bluntly rounded at their tips. 



The third and fourth pairs are on the dorsal posterior margin at 

 the center, and are fused at their bases; the fourth pair is on the 



median line and the two processes are completely fused except at 



their very tip-, which are enlarged into circular lamina', flattened 

 dorso-ventrally and somewhat irregular around their margin. The 

 third pair -land one on either side of the fourth, and are fused with 

 (he hitter for then- basal half. But their terminal halves are free 

 and extend beyond the tip- of the fourth pair n- conical processes, 

 which are curved slightly awa\ from the mid-line. 



The four processes thus arranged in a row are naturally i :h 



wider than thick, and they curve over Neutrally between the egg 

 strings, very similar to the feathers of the tail of a duck or goose. 

 The egg cases are attached to the posterior margin of the genital 

 segment between the second and third processes on either side. They 

 are widely separated and ellipsoidal or often spherical in form: the 

 eggs are large and there are Ou or 60 in each case. There i- no 



