2. Arthrochordeumium appendiculosum n. g. n. sp. 
A new endoparasitic Copepod in the Ophiurid Astrocharis 
gracilis Mrtsn. 
By 
K. Stephensen. 
Till now we know only two endoparasitic Copepoda from Ophiu- 
rids, v12.: 
Philichthys amphiuræ Hérouard, Sur un nouveau copépode 
parasite d' Amphiura squammata; Comptes Rendus Acad. Sci. Paris, 
fome 142; 19063 pp.; 3 texthies:, and 
Chordeumium”) obesum Jungersen. 
Chordeuma obesum, a New Parasitic Copepod endoparasitic in 
Asteronyx Loveni; Jungersen, in Report Brit. Assoc. 82.d Meet- 
ing 1912. — Chordeuma obesum, a New Parasitic Copepod 
endoparasitic in Asteronyx Loveni M. Tr.; Jungersen, in 
Mindeskrift for Japetus Steenstrup, No. 16, 1914. 
The first species was found at Roscoff, the other is very com- 
mon in the Skagerrak, and no species was known outside the 
northern seas. 
The parasite in question is situated in the coelome of the 
proximal part of one of the arms of the host, and the arm is 
dorsally swelled into a gall with a little pore about in the centre 
E| 
The name Chordeuma is preoccupied for Myriapoda (Chordeuma 
C. L. Kock, System d. Myriapoden, Regensburg 1847, p. 51, 124—125, Pl. I, 
fig. 9—10; Chordeumiden C. L. Kock ibid. p. 49, 119) and. is in combi- 
nation with affixa (e. g. Microchord., Orthocord.: C. Verhoeff in Wieg- 
mann, Archiv f. Naturgesch., 63. Jahrg., 1. Bd., 1897, p. 131) used for 
other Myriapoda. Thus the name Chordeuma for a Copepod must be 
dropped, and I propose to change it into Chordeumium. 
