UVETTE 427 



Uvette*. The "warze" of deMan, i.e. the "rosette" of zur Strassen, is 

 the structure to which I apply what seems the more appropriate name 

 "uvctte." Comparisons show that, notwithstanding the very marked dif- 

 ferences in form, the various organs herein called uvettes are homologous; 

 the same is true of those called monil form glands. 



The uvette of Adoncholaimus fuscus (Bastian) as illustrated by deMan 

 probably presents 32 elements (Kornchen, deMan's Fig. 29) as does that of 

 M . pristiurus; these elements have been outlined by deMan and figured some- 

 what more in detail by zur Strassen (deMan's Figs. 24, 29; zur Strassen 's 

 Figs. 13, 14). 



In favorable specimens I have seen the uvette of fuscus to be a "radial" 

 structure made up of about 32 elements surrounding a minute pore, somewhat 

 as in the uvette of pristiurus, (See Fig. 1) but the elements here are far less 

 refractive. Rarely can one see the appearance illustrated by deMan in his 

 figure 29; whereas the appearance he does not satisfactorily illustrate, a 

 very complicated one, by the way, is the usual appearance; and when this 

 appearance is more pronounced, commonly the minute refractive "Kornchen" 

 that deMan figures are not to be seen, or only some of them faintly. DeMan's 

 "Kugel," figured by him as if nearly round, I find seldom round or ball-shaped; 

 frequently it is so "collapsed" (?) as to be difficult to see at all, and it is more 

 likely to be elongate or ellipsoidal, or perhaps flattish-ellipsoidal, than to be 

 equidiametral as shown in deMan's Fig. 29. 



DeMan does not give a thoroughly satisfactory description or figure of 

 his "Warze." In one of his figures (Fig. 29) I count 33 minute, circular, dot- 

 like elements where he makes his "Verbindungsrohrchen" join the "Warze." 

 Occasionally I also see this appearance, and with about the same number of 

 elements (32?). It is difficult to say as yet what the exact function of the 

 uvette is, but it seems a regular, doubtless glandular, component of the 

 demanian system. In Oncholaimium appendiculatum the uterine vessel, 

 extending backward from the uterus, nearly as described for pristiurus, 

 finally expands a trifle into a small, often rather indefinite, ampulliform 

 uvctte of the very simplest character, which joins the right subdorsal of the 

 two longitudinal series of cells, the moniliform glands, by means of a 

 minute refractive pore, the uvette pore. See uv, Fig. 3. In Oncholaimus 

 nigrocephalatus the uvette, which in 0. appendiculatum appears as a simple 

 ampulla, becomes somewhat compound; that is to say, two additional or 

 subordinate elements occur, one on either side of the main "ampulla," so 

 that the whole is rather obscurely triplex. 



In another oncholaim, Oncholaimus serpens n. sp., the uterine tube extends 

 backward just as definitely as in Oncholaimium appendiculatum and joins 

 the rest of the demanian system in the form of an expanded and much larger 



* Uvette ; a diminutive cluster. From latin, uva, a cluster of grapes. 



