REPORT ON THE COPEPODA. 137 



Chondracanthus (?) macrurus, n. sp. (PI. LV. figs. 4-8). 



Length, 29-100ths of ;in inch (7'25 mm.). Body short and stout ; head considerably 

 broader than long, broadly rounded in front, and having a long and slender alaaform 

 process at each side, directed backwards. Anterior antennae rather large, projecting 

 much beyond the sides of the head, two-jointed, obtuse and quite destitute of setae. 

 Abdomen stout, as broad or broader than the head, and about twice as long as the 

 cephalothorax, genital segment short, tail very small and terminating in two minute 

 spines, and reaching about as far backwards as the abdominal lobes. The second 

 cephalothoracic segment has two lateral alae similar to those of the first segment. 



Parasitic on a Macrurus, taken at a depth of 600 fathoms, off the Kermadec Islands. 

 One specimen only. 



This ought probably to be made the type of a new genus, the mouth-organs being 

 apparently quite different from those of Chondracanthus, but my observations of it are 

 so imperfect that it seems best to place it provisionally with Chondracanthus. 



Family IV. Lekn.eid.e. 



Lerncea, Linne. 



Body more or less twisted and outre" in appearance. Head furnished with horn-shaped 

 appendages, which are irregularly branched. Ovarian tubes twisted into round masses and 

 placed under the posterior portion of the body. Abdomen of considerable size (Baird). 



1. Lerncea hemiramphi (?), Kroyer. 



Lemma hemiramphi, Kroyer, "Didrag til Kuudskab om Snyltekrebs, p. 318, Tab. xv. fig. 7. 

 Parasitic on Cavalli taken at St. Vincent, Cape Verde, August 5, 1873. 



2. Lerncea abyssicola, n. sp. 



An interesting species of Lerncea, which I propose to call Lerncea abyssicola, was 

 observed during the voyage of the Challenger by Dr. v. Willemoes Suhm. The 

 accompanying woodcut is reproduced from his drawing of the living animal, and the 

 following description is taken from his notes. 



Lerncea, July 23, 1873, 2400 fathoms ; Station 89. On a specimen of tbe curious Lophioid genus 

 Ceratias 1 — an undoubted deep sea form — I discovered a specimen of Lerncea, which differs from all 

 other parasitic Copepoda by its transparency. The head of the animal is a simple thread-like 

 prolongation imbedded in the lateral muscles of the fish, and, so far as I was able to trace it, was quite 

 unprovided with differentiated appendages ; and I hardly think that they could have got torn off. 



1 The fish here alluded to is described by Sir Wyville Thomson (Voyage of the Challenger, Atlantic, vol. ii. p. G9) 

 as Ceratias uranoscopus, Murray ; Dr Gunther is of opinion that it is specifically identical with Ceratiaf heUwUi from 

 Greenland. — J. M. 



(ZOOL. CHALL. EXP. — PART XXIII. — 1883.) 7, 18 



