924 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [46] 



and also those of UnchytrwidcB, but those latter, however, to a lesser 

 degree. The general form of these organs is in the first two of the 

 above families exactly the same, and with Unchy tree idee the only differ- 

 ence is that the tube there is surrounded by one single mass of granu- 

 lated or glandular matter, giving the whole organ a more compact 

 consistency. In Tubijicidce, as well as in Lumhriculidce, the duct is 

 comparatively free, and only in Limnodrilus alpestris have I found a 

 tendency to cellular agglomeration, as a few windings of the duct are 

 here surrounded by a common cellular matrix. 



The tube of the organ is sometimes surrounded all along by numerous 

 oblong or round cells, more or less inflated, always pellucid, and some- 

 times furnished with a very conspicuous nucleus. Such globular cells 

 are found in Telmatodrilus Vejdovslcyi, Limnodrilus alpestris and L. 

 Moffmeisteri, Camptodrilus corallinus, and C. igneus. In L. Hoffmeisteri 

 and Limnodrilus alpestris, and also in C. corallinus, they are found only 

 on those segmental organs which are situated in front of the cingulum, 

 but in the other species also on those situated behind the same. 



Such pellucid cells are also found attached to the segmental organs 

 of Rhynchelmis,* of the family of Lumhrimdidce. 



The tube at the base of the interior aperture of the segmental organ 

 is sometimes surrounded \yy glandular agglomerations of mostly a 

 brownish or yellow color. Such agglomerations, however, are rarely 

 met with, and I have encountered them only in Camptodrilus igneus. 

 By Clarapede they are described in Limnodrilus Hoffmeisteri and L. 

 Udekemianus. 



In Lumhriculidce they are found in all the geuera except Ochnerodrilus, 

 and in Lnchytrceidw in LJnchytrwus puteanus, lobi/er, and Leydigii. 



In Ilyodrilus fragilis the wall of the tube below the funnel-shaped 

 aperture was found to be considerably enlarged, or, perhaps, rather 

 covered by several large cells, each with distinct nucleus. But the rest 

 of the tube did in nothing particular differ from the general form. 



Fbesno, Cal., March 15, 1880. 



Vejdovsky : Auat. Stuclien an Rhynclielmis, page 346. 



