160 D. BRYCE ON THE ADINETAD^. 



manners similar to those of his oculata, he refers one, it is 

 true with much misgiving, to the Callidina hidens of Gosse, 

 and states of the other simply that it is distinct, all three 

 forms having two teeth on each ramus. He considers that 

 Ehrenberg's figures of Callidina indicate species with a similar 

 formation of the ciliary organs, and to show that Continental 

 observers were not themselves clear upon the point, I find in 

 Dr. Zelinka's treatise (p. 56) a comparison of definitions by 

 other writers of the genus in question. Among them is one by 

 Eyferth, in " Simplest Forms of Life," published in 1878. I 

 translate one sentence only : " Column and ciliary organ 

 soldered to an acorn- shaped (viewed from above), weakly 

 ciliated, outstretched head." 



Upon this Dr. Zelinka remarks that, " according to Eyferth, 

 the column is always outstretched and with, the ciliary organs 

 soldered to an acorn-shaped head," a representation which, he 

 proceeds, is only to be explained by the author having either 

 never watched a living Callidina for a time, or that he has 

 wrongly understood what he has seen. The criticism is an 

 unfortunate one. Eyferth's words describe Adineta vaga very 

 closely, and as, in those days, every Bdelloid, which had no 

 eyes, was called a Callidina, it is not surprising that he should 

 have assigned its peculiarities to the genus. But it is surpris- 

 ing to me that Dr. Zelinka himself should not have seen A. 

 vaga, after his long researches on moss-dwelling Callidinas, but, 

 beyond including Mr. Davis' article in his Bibliography of the 

 Botifera, he makes no reference to the species, although dis- 

 cussing the relative characters of several other and earlier 

 described forms. I can only infer that vagas geographical 

 distribution does not extend to Bohemia. 



I have now to introduce to you a third species, which I 

 propose to name 



Adineta clauda (n. sp.). 



Sp. Ch. : Outline maggot-like, segments coarsely marked ; 

 trunk with lateral longitudinal skinfolds. Head as broad as 

 long, only partly protruding from neck segments. Foot short, 

 thick, apparently abruptly truncate, and ending in broad, 

 sucker-like disc. Second foot-joint a mere skinfold, furnished 

 posteriorly with a row of about ten small, fleshy, papilliform 

 lobes of varying size. Eyes absent. 



