428 



MALE ONCHOLAIMIUM. OSMOSIUM 



uvette, rather closely resembling one of the uvettes of 

 * Adoncholaimus fuscus. In 0. serpens the elements are not 

 u nearly so refractive, and the somewhat pyriform whole is 

 so symmetrical ; but it is made up of radiating elements 

 " l * arr having some resemblance to those composing the uvette of 

 P (K pristiurus. 



ili i nn isi not sfunct or sum .nit , sub ail Osmosium. Moniliform 

 ..mesa glands. In addition, I 

 .din/M have established to my 

 satisfaction that the main 

 tube of the demanian sys- 

 tem in Adoncholaimus fus- 

 cus, which was described by 

 deMan as probably being 

 merely fastened anteriorly 

 to the intestine, and there- 

 fore regarded by him as 

 probably merely a holdfast, 

 is in reality in communica- 

 tion with the intestine by 

 means of what I have 

 called an osmosium.* It 

 has much the same struc- 

 ture as that described by 

 zur Strassen for Metoncho- 

 laimus pristiurus and M. 

 deMani (zur Strassen, Figs. 

 4 to 12), and which I 

 have examined in pris- 

 tiurus, except that there is 

 no open communication. 

 There are no essential differ- 

 ences in the structure of 

 & & the enteric junctions of the 

 arson silmit' 'tut nsrsm 



Xig.2.Ma.leOnchclaimiumappendi- * Osmosium; that part of an 

 culatum n.g.,n.sp., drawn from a fixed emunctorium or analogous or- 

 and stained balsam specimen. The gan through which, mainly by 

 locus of the cross section drawing is osmotic action, soluble matter 

 ar shown at locusx-sec. ac gon, accessory is transferred from one organ to 

 to gonad; al'm'nt, food material; another. The osmosium is 

 appndl, appendicule; chrsm hap 14, here not emunctorial. It is 

 .one haploid number of chromosomes ; jnc still doubtful whether the os- 

 aasff ^ s '> J unc ti on f testes; ncll spmct, motic cells in this particular 

 nucleolus; ncl spmtd, nucleus of case are of enteric or deman- 

 srtaiha.L' spermatid; orginq, organs of uncertain ian origin. While the staining 

 function; os ac gon, mouth of accessory of these cells seems to favor de- 

 to gonad; spmct, sprmatocyte; tst manian origin, the structure 

 (175 ant, front testisjr, its cross-section, seems to favor enteric origin. 



