DR. H. J. HANSEN ON THE CIROLANIN^. 337 



JRevision of the European Marine Forms of the Cirolanince, a 

 Subfamily of Crustacea Isopoda. By H. J. Hansen, 

 Ph.D., F.M.L.S. 



[Eead 2ncl February, 1905.] 

 (Plates 33-35.) 



In 1890 I published a paper entitled " Cirolanidse et familise 

 nonnuUse propinquse Musei Hauniensis " (K. Danske Vidensk. 

 Selsk. Skrifter, 6. Eaekke, naturv. og mathem. Afdeling, B. v. 

 pp. 239-426, tab. 1-10). The material preserved in the 

 Copenhagen Museum was comparatively rich ; from Europe 

 and the West Indies especially it possessed a large number of 

 species. I was therefore able to prepare the treatise as a kind 

 of monograph : all forms available were described ; a list of all 

 genera and species unknown to me, with all localities mentioned 

 in the literature of the subject, was put together, and an attempt 

 was ruade to refer such animals to the genera or families to 

 which they really belonged * ; the paper contains also a rather 

 detailed representation of the appendages, especially of the 

 mouth-parts. These particulars are mentioned here because 

 in the following treatise that paper is taken as the starting- 

 point. I have nothing to add to my earlier investigation of the 

 mouth-parts and other appendages, the antennae excepted ; 

 further, the reader is referred to the numerous figures of several 

 species and to the detailed account of biology, earlier synonymy, 

 &c., given in that paper, but omitted here in order to avoid 

 unnecessary reprinting of these portions. 



Since 1890 many authors, viz., J. Bonnier, A. Dollf us, P. Grourret, 

 H. J. Hansen, S.Lo Bianco, G-. O. Sars,T. Scott, T.E.E.Stebbing, 

 and A. O. Walker, have published papers containing contributions 

 to our knowledge of the European marine forms of the group ; 

 several new species have been established, and especially numerous 

 new localities for earlier known species have been enumerated. 

 These treatises are registered in the " List of Papers " (p. 370), 

 and an abstract of their contents is given under the species in 

 question, but two of them must, nevertheless, be mentioned here. 

 In the paper "Isopoden, Cumaceen und Stomatopoden der 



* Several of the descriptions are unfortunately so imperfect that I could only 

 doubtfully locate the various forms. 



LINN. JOTJEN. — ZOOIiO&T, TOL. XXIX. 23 



