434 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



ARTACOLAX (BOMOLOCHUS) ARDEOLiE Krbyer, new genus name. 



Artacolax (Bomolochus) ardeolce Kboyek, L863, i>. 220, pi. xi, figs. :> a to e. 



Host and record of specimens. — A single female was taken from the 

 gills of the little garibaldi, Hypsypops rubicundus^ at La Jolla, by 

 Doctor McClendon, and is Cat. No. 38597, U.S.N.M. 



On examining the described species of Bomolochus it is found that 

 there are differences between them which can not consistently be in- 

 cluded in a single genus. These differences are found in the body 

 segmentation and in the structure and arrangement of the mouth 

 parts and the first swimming legs. The same rule must be applied 

 here that is used in dealing with other genera. In all the species 

 really belonging to the genus Bomolochus there must be the same 

 number of thoracic segments, however much those of the abdomen 

 may vary. The appendages must also be of the same general char- 

 acter and similarly arranged. But this is not found to be true, 

 and, accordingly, the preceding new genus must be established for 

 certain species hitherto included in the genus Bomolochus, which 

 agree among themselves, but do not agree with the original Bomolo- 

 chus type. 



Family CHOXDRACANTHID.E. 



CHONDRACANTHUS EPACTHES, new species. 

 Plate LXVI. 



Host and record of specimens. — Five females and two males were 

 taken by Doctor McClendon from a chimaera or elephant fish, Hydro- 

 lagus colliei, at La Jolla, and are Cat. No. 38580, U.S.N.M. These 

 are made the types of the new species. 



Female. — General body form elongate with rounded outlines and 

 without any horns or processes. Head small and ovate, considerably 

 narrowed anteriorly and covered with a carapace of the same shape 

 but smaller, not reaching the posterior margin of the head. 



First thorax segment only three-fifths the diameter of the head, 

 twice as wide as long, and distinctly separated from the following 

 segment. Second segment twice the width of the first, narrowed an- 

 teriorly, and also distinctly separated from the following segments. 

 Genital portion divided at its center by a marked constriction on 

 either margin and a well-defined groove; the two halves very dif- 

 ferent in form, the anterior one oblong with straight and parallel 

 sides and but slightly rounded corners, the posterior half elliptical, 

 with strongly convex sides and long club-shaped processes at the 

 posterior corners. Abdomen small and conical, bluntly rounded at 

 the tip, less than half the length of the posterior processes, and with- 

 out anal Laminae. Egg strings one- fourth the diameter of the genital 

 portion and a little longer than the entire body, tapering toward the 

 posterior ends; eggs small, about ten longitudinal rows, 



