Earthworms of the Vienna Museum. 123 



ii]ion oacli side of a median gap. The eighteenth segment 

 has five or six setie upon eaeh side of the median gap. 



Dorsal pores are ])vcsent, and connnence, as in Megnscolex 

 arriintits, between segments v./vi. 



The oviducal pores, as in Megascolex generally, arc double ; 

 caeh pore lies in front of the innermost seta of segment xiv. 



I'he male pores are upon segment xviii. No seta3 lie 

 between them ; they arc placed in the line of the setai. 

 Eaeh pore is surrounded by ]irominent lips, and there is a 

 genital ])apilla in front of and behind eacli pore; the papillae 

 in question are upon the boundary-lines between segments 

 xvii./xviii. and xviii. /xix. 



In Schmarda's figure of the species the clitcllum is depicted 

 as commencing with segment xv. ; but in the text it is stated 

 to commence after the thirteentii. 



\\'!icn the worm was opened by a median dorsal incision 

 the intestine was partially cut into ; otherwise the viscera were 

 uninjured. Five of the intersegmental septa were specially 

 thick and appeared of a brownish colour, the thin septa being 

 bkiish or colourless. 1'he first thick septum follows imme- 

 diately after the gizzard ; in front of the gizzard lies the first 

 recognizable septum, which is also rather thick ; between 

 this and the septum following the gizzard is a thin septum. 

 The thick septa are bound by numerous isolated muscular 

 strands, which show interference-colours. The cumber of 

 them appeared to me to be unusually great for so small a 

 worm ; they were particularly abundant in the gizzard-seg- 

 ment and in those lying in front of the gizzard. 



The alimentary tract presents the usual divisions ; tlie first 

 four segments were occupied by the buccal cavity, pharynx, 

 and a part of the oesophagus. The buccal cavity was largely 

 everted ; the pharynx did not present the compact appear- 

 ance which is usual in this organ ; the muscular fibres forming 

 its dorsal wall and connecting it with the parietes were greatly 

 broken up into bundles running chiefly in a longitudinal 

 direction ; this was no doubt due to the protrusion of the 

 buccal cavity and the consequent pushing forward of the 

 pharynx ; the fifth segment was entirely occupied by the oeso- 

 phagus — the gizzard lying in the two following ; the fifth seg- 

 ment is not bounded posteriorly by a distinct septum, but 

 the sixth and seventh are separated by a septum. The forward 

 position of the gizzard and the presence of a septum dividing 

 the two segments in which it lies are characteristic of the 

 genus Megascolex^ at least these features are not met with in 

 Fcrichoita (s. s.). The terminal section of the oesophagus is 

 exceedingly narrow, and the large intestine suddenly begins 



