.■;s I- \i.ii<(1:nia acakkm y ok sciences. 



>;eiiiis. and iiv(!ra<^c altoiit twice or three times as close as in D.ltnnia Troijeri. 

 This is a |>iuiniiu'iit aiul cDiisfaiit characteristic. The chaiactciistie feature of the 

 iffiius. whicli consists in the nariowing together of the ventral selic on i)oth sides 

 and hiwards the male pore in xvii, is readily seen in lliis .species. ()n account of 

 the ali'cadv very close approach of the ventral seta' of eacdi couple, this narrowing 

 liigcther is, however, less perceplilde in our present species, l)ut it is still (MHisider- 

 ahle and readily seen. The iigure (fig. 40) will illustrate this hetter than any 

 lengthy description. Not only does this approacdi of the setse exist on hoth sides of 

 the male pore. Iiul il is also seen towards the spcrmatliecal pore, though here in a 

 >iiiallrr degree. In Dalldnin IVoi/cri, there i.s not a trace of such an increa.sed ap- 

 proach of the ventral setic towards the spermathecal pore. Another characteristic as 

 regards the seta* is that the ventral or inner cou|)les are mnch closer together than 

 in tlu; other two .species di'scrilicil here, so close thai the main hodies of the spernia- 

 theciv almost (ondi. 



The spermathecal |)ore is situated in the intersegmental groove hetween viii 

 and i.\, in front of seta 1. In lJi;/fiinia 7)-ot/i'ri, the spermathecal pore is in front of 

 the corresponding seta 1, hut considerably more lateral, and on account of the 

 greater distance of the ventral coui)les of setic, the .spermathecu' in that .species are 

 much further apart, and do not crowd the ventral ganglion. Ovidiical pore as usual 

 in xiv. Penial sctse on papilhe in xvii, opening in the male pore. The clit(dhim 

 comprises three full and wide somites, xiv, xv, xvi, and two smaller ones, xiii and 

 xvii, as in other species. 



The genital region (fig. 4(S) around the male papilhe is niiu-li simpler than in 

 DcUrinln I'roijcrl. The two papdhe are situated much closer together, and there are 

 no suctorial depressions with their fan-shaped arrangement of muscles. The penial 

 seta' are very slender, sickle-like, bent at the free apex, with a narrowed and sharp 

 poinl. There are a dozen or more external fd)res of exceeding thinness stretching 

 from the anterior part of somite xvii to the posterior part of xviii. These 

 threads, however, exist only in the longitudinal groove lietween the papilla', all run 

 parallel with each other and with the long axis of the body (fig. 4S). As to their 

 nature I am not at all certain. They are apparently too (liin to he muscles. The 

 clitcllnni proper in this as in (he preceding species ends at the papilhe (tr male pore. 

 Anterior lo it liic clitellum consists of regular flask-like cells; po.sterior to it again 

 the body-wall has assumed its regular appetiranee. In Dcltditin Troijeri the (ditellar 

 thickening slops just befoi'c it reacdies the pa[)ilhe, but in Pi'ltdnin Hi'ii/uiiiil it stops 

 just as it reaches the male pore. The papilhe, however, continue lo the posterior end 

 of the somite. 



The length of I he species is about 1 and 1 J inch, by ,',., to ^ inch wide, taper- 

 ing towards the caudal end. In fact the general form and size does not dilYi-r from 

 llie preceding species. In all I found some lifteen speeiinen<, but lliey wei'e, un- 

 forliinalely, in poor corHlilion when 1 arrived honn-. and llie pari po-h^rier lo llie 

 clitellum had already iieguri lo decompose. The following account of llie anatomy 

 is, iherelorc, not .i- hill a- de-iiable, bill eiiouuli is known lo perfeclU eliar.aclerize 



