Copepoda taken in the West of Ireland. 141 



This species is described by Thorell as being a common 

 parasitic inhabitant of Ascidia parallelogramma. 



Genus Solenostoma, nov. gen. 



Generi antecedenti simile. Antennae vero primi paris breves, 12- 

 articulatae' ; secundi paris magna?, biramosse, ramo principali 

 4-articu.lato, in apice spinis 2 fortibus aculeatis armato. Maxil- 

 larum rami seeundarii obsoleti, setis 2 ciliatis compositi. 



Solenostoma scutatum, n. sp. 



Body subpyriform ; cephalothorax broadly ovate, first seg- 

 ment equal to half the entire length of the animal. Anterior 

 antennas very short, equal to scarcely one third the length 

 of the first segment of the body, densely setose: posterior about 

 equal in length to the anterior, stout ; primary branch ter- 

 minating in two strong lancet-shaped spines, one of which is 

 much longer than the other, and bearing also one moderately 

 long and two small seta; ; secondary branch simple, uniarticu- 

 lar^ and bearing a long terminal seta. Mandible tubular, 

 excessively long, reaching as far as the middle of the caudal 

 segments ; palp long, filiform, and setose. Caudal segments 

 three or four times as long as broad, each bearing one short 

 lateral and five long apical setae, two of which are strongly 

 plumose. Length -^ of an inch. 



Found sparingly on the fronds of Lammarue in Clifden 

 Bay. 



A very remarkable animal, differing from the genus Asco- 

 myzon chiefly in the structure of the maxillae and second pair 

 of antenna?, but agreeing with that genus in the general con- 

 formation of the mouth-apparatus. 



Genus Asterocheres, Boeck. 



Asterocheres Lilljeborgii, Boeck. 



A. Lilljeborgii, Boeck, Tvende nye parasitiske Rrebsdyr (1859), p. 6, 

 tab. 2. 



Three specimens were found on a sponge dredged in West- 

 port Bay. M. Boeck's specimens were taken on the disk and 

 rays of Echinaster sanguinolentus ; but though after its first 

 discovery that author sought for the little parasite diligently on 

 many examples of the starfish, he did not succeed in finding 

 any further specimens. It would appear, indeed, from the 

 various positions in which we have found many of these sucto- 

 rial or parasitic species, that they are not very fastidious as to 

 the source from which they draw their nourishment. 



