1899.] PARASXTIC COPEPODA ON FISSES. 491 



antennte slender, with three joints. Posterior large, trifurcate. 

 There are four pairs of rudimentary limbs, the first biramose. 

 Ovarian sacs long ; ovules multiserial. 



Male pigmy, like those of Chondracanihus. 



(1) Teichthaceeus peeistedii. 2 (S ' 



TncWiacerus perlsiedii Kr. Bidrag til Kundskab, 1863, p. 264. 

 pi. xiv. fig. 7. 



Host : gills of Peristeilius sp. Rio Janeiro. 



(2) Trichthaoeeus molestus. 5 . 



Trichthacerus molestus Heller, Eeise d. No vara, 1865, p. 233, 

 pi. xxiii. fig. 5. 



Host: gills oi Prionotiis jjw^ctatus. Brazil. 



G. 6. Blias Kroyer. 



Head rounded, separated by a constriction from the smooth, 

 thick, oval body, which is unsegmented and without processes. 

 Abdomen biarticulate, small, with two short teruiinal setse. 

 Anterior antennae short, thick. Posterior are two-jointed, unci- 

 nate. Mouth at the posterior part of the head. Two pairs of 

 single branched articulate limbs are present. 



Hale pigmy, like those of Ghoiidr acanthus. 



Blias peiojstoti. $ c? • 

 Aethon pi'ionoti Kllr. Ann. Wien. Mus. 



Blias prionoti Kr. Bidrag til Kundskab, 1863, p. 262, pi. xii. 

 fig. 5. 



Host: gills, oi Prionotus jjunctatus. Brazil. 



G. 7. Chondeacanthus. De la Eoche. {Lernentoma Blainv.) 



Head distinct, separated from the body by a more or less 

 constricted neck. Thorax indistinctly biarticulate, bearing two 

 pairs of lobe-like limbs. Genital segment compressed with 

 concave borders, or provided with irregular globose or elongated 

 processess. Abdomen distinctly articulated, placed between the 

 two posterior horns. Anterior antennae 2-or3-jointed. Posterior 

 uncinate, stroug. Mouth and appendages placed a little behind 

 these. External ovaries large ; ovules multiseriate. 



Male pigmy ; the cephalothorax carries the strong hook-like 

 posterior antennae (or hooks of attachment) on the dorsal surface ; 

 abdomen segmented ; thoracic limbs articulate. 



(1) ChONDEACANTHUS COEIfUTUS. 6 2 • 

 Lerncea cornuta Miili. Zool. Dan. i. 1776, pi. xxxiii. fig. 6. 

 Entomoda cornuta Lamarck, Hist. Aniin. sans Vert. viii. 1818. 

 Anops cornuta Oken, Lehrbuch Naturg. iii. 1815. 

 Lernentoma cornuta Blainv. Diet. Sc. Nat. xxvi. 1823, p. 126. 



