654 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



2. Second maxillae half as long again as the trunk; bulla thin and wide. 



diibius (T. Scott), 1900. 

 2. Second maxillae the same length as the trunk; bulla thick and narrow. 



duthae (T. Scott), 1900. 

 2. Second maxillae half the length of the trunk; bulla thin and narrow. 



malleus (Rudolphi), 1832, p. 654. 



2. Second maxillae one-third the length of the trunk; bulla email and mushroom 



shaped; no posterior processes dentatus (Wilson), 1912, p. 654. 



3. Ends of second maxillae slightly coalesced, branched separately; posterior proc- 



esses short, curved ramosits Kr^yer, 1863. 



3. Ends of second maxillae enlarged into semilunar disks; posterior processes strongly 



curved dalmanni (Retzius), 1829, p. 655. 



3. Ends of second maxillae ttrminating in finger-like projections; posterior processes 



short and divergent hippocephnlus (Hesse), 1879. 



3. Ends of second maxillae enlarged into semielUptical disks, which are slightly 



coalesced at the center; no branches or projection; posterior processes short and 



straight hicaudatus (Kr0yer), 1837, p. 656. 



CHAROPINUS MALLEUS (Rudolphi). 

 Brachiella malleus Nordmann, 1832, p. 95.— Vogt, 1877, p. 46, pi. 3, figs. 1-8. 



Host and record of specimens. — A single lot of females with egg 

 strings broken was taken at Port Arthur, Manchuria, by J. F, Abbott, 

 and were sent to the author from Stanford University by Dr. C. H. 

 Gilbert; there is no record of the host or date of capture. These 

 parasites have been given Cat. No. 38578, U.S.N.M. 



Remarlcs. — This species was first described in manuscript notices , 

 by Rudolphi in 1817 under the name Dirhynchus malleus. These 

 notices were handed OA^er to Nordmann, who published the species 

 in 1832 as Brachiella malleus, with a short description but no figure. 

 In 1877 Vogt published a more elaborate description, accompanied 

 by excellent figures, and it has been noted by many subsequent 

 investigators. The type of male however, which is admirably 

 portrayed by Vogt, is very different from that belonging to the genus 

 BracJiiella, but is like Oharopinus, and accordingly is transferred to 

 this latter genus. 



CHAROPINUS DENTATUS (Wilson). 

 Brachiella dentata Wilson, 1912, p. 97, pi. 9. 



Host arid record of specimens. — Six lots of this species, numbering 

 twenty to twenty-five specimens each, and including both sexes, 

 were obtained by Rev. George W. Taylor, former director of the Pacific 

 Coast Biological Station at Nanaimo, British Columbia. They were 

 taken from the gill arches in the throat of the large skate, Raja 

 hinoculata, and the lots have received, respectively, Cat. Nos. 38636, 

 38642, 38643, 38644, 39537, and 39540, U.S.N.M.; the first lot were 

 made the types of the species. 



Remarlcs. — Both sexes of this species were fully described and 

 figured in the paper referred to above, and at the time the manu- 

 script was written they were referred to the genus Brachiella in con- 



