Earthinonns of (lie Vienna Mascwn. 11,") 



the oiitiM-niosfc seta of tlio dorsal couple; this is of course moic 

 apparent when the seta', diverii^c posteriorly. 



The clitelUun is developed in one specimen and occupied 

 segments xv.-xxiii. There are two pairs of calciferous glands 

 in segments xii. and xiii. These glands, as in UroclmiUiy 

 stand out from the walls of the oesophagus instead of being 

 atl ached to them along their whole length, as in most earth- 

 worms ; they are subconical in form, the apex being directed 

 away from the gut. A large branch arising from the dorsal 

 vessel on each side supplies the anterior glands, entering them 

 at the apex. 



The principal difference, however, which this species shows 

 from either of the other two species is in the sperm-sacs ; 

 instead of being represented by a single pair of long '' tongue- 

 shaped " organs, the sperm-sacs of Anteus heterostickoa 

 are two pairs of small bodies attached to the anterior se[)ta of 

 segments xi. and xii. They appear, in fact, to resemble those 

 of Anteus gigas. 



It is noteworthy that this species, like the other two, 

 possesses no spermatheca; the absence of these structures 

 seems to characterize the genus. 



The nephridia fall into two series; up to the twelfth seg- 

 ment they have an exceedingly long muscular duct, which is 

 shown by Horst in his figure* of the nephridium in Anfeus 

 gigas. I traced a delicate tube passing from this tuft of 

 tubules forwards into the segment in front, where it doubtless 

 ends in a funnel. Perrier's figure t of the nephridium and 

 his description give an erroneous idea of the structure. The 

 description runs as follows : — " Ces organes prdsentent d'ail- 

 leurs dans ces deux anneaux et dans les sept suivants qui 

 font egalement partie de la ceinture un calibre plus consider- 

 able. Au lieu d'etre pelotonnes corame chez la plupart des 

 Lombrics, ils sont simplement un peu flexueux ; leur calibre 

 est sufKsant pour qu'on puisse les injecter facilement par 

 leur orifice exterieur, qui est lui-meme fort apparent sur la 

 ceinture. Chacun d'eux est termine par une sorte de houppe 

 fornide par une serie de replis niembraneux implantes sur sa 

 portion terminale libre. Cette houppe constitue le pavilion 

 vibratil au milieu duquel s'ouvre le canal." This description 

 implies that the convoluted tuft of tubules is really a large 

 funnel. 



Keither Perrier nor Horst noted that the posterior nephridia 

 are different in structure from the anterior series. After the 

 twelfth segment (in the present species) the nephridia still 



* Notes Levd. Mus. xiii. pi. ri. fig. 3. t Loc. cit. pi. i. fig;. 14, 



8* 



