NEOMENIA. 289 



developed as simple folds of the circum-anal border, never feathery. 

 Hermaphroditic. Genital ducts uniting into one median opening 

 below the anus. As nephridia act apparently certain pre-anal 

 glands which ojjen into the cloaca. Radula of the usual kind, or 

 entirely wanting. Mid gut without blind sac, with numerous lateral 

 pouches. Animal living free or parasitic. 



[Note.— The "preliminary notice" reigns supreme among the "mor- 

 phologists," nearly every paper upon Solenogastres having been pre- 

 ceded by one or more of these troublesome notes. No species mon- 

 ger ever carried the struggle for priority to the extreme ordinarily 

 met with in the literature of this group. The genera Rhopalomenia, 

 Macellomenia, Nematoinenia, Myzoii tenia and Echinomeula, and the 

 species Proneomenia langi, were proposed in the new edition of 

 Bronn's Thier-Reich and in Zeitschrift fiir Wissenschaftliche Zoolo- 

 gie, Ivi, pp. 322-325, 1893, nearly simultaneously. In the text I 

 have cited Bronn only, as that has probable priority of publication, 

 though the other paper may have been prepared first. 



Pruvot's genera and species were briefly diagnosed in Arch. Zool. 

 Exper. et Gener. (2), viii, p. xxii, xxiii, prior to the publication of 

 his elaborate and excellent work of the following year]. 



Genus NEOMENIA Tullberg, 1875. 



Neomenla Tullb., Bihang k. Sv. Akad. Handl., iii. No. 13 

 (1875). — WiREN, K. Sv. Vet. Akad. Handl., xxv, p. 15. — Solenopvs 

 M. Sars, Forh. Videns. Selsk. Christiania, 1868, p. 257 (name only, 

 no description). — Koren & Danielssen, Archiv for Math. og. 

 Naturvid. Christiania, 1877, p. 6. 



Body short, plump, similarly shaped at the two ends, cloaca sub- 

 terminal, the foot-groove continued to it (except iu N. grandis) with 

 7-13 longitudinal folds within; a rudimentary sole present. In- 

 tegument with a simple layer of spicules, part of them grooved, 

 part needle-shaped, projecting well from the cuticle between large, 

 several celled papillae. A circle of short branchial foldsaround the 

 anus. Mouth terminal, with numerous thread-like cirri; no radula 

 or salivary glands ; pharynx protrusible. A copulating organ gen- 

 erally developed. Type, N. cari)iata. 



The most extensive and elaborate work upon this genus is that of 

 Axel Wiren, cited above. Simroth has given a good synopsis in 

 the new edition of Bronn. Wiren gives the following observations 

 ■upon the habits of A^. carinata : 



