NEW SPECIES OF OCNERODRILUS. 233 



stantly taking place in the live worm. With every pulsat- 

 ing movement of the vascular system, the septal glands 

 participate, being pulled backwards and forwards and 

 side ways. In longitudinal sections of the worm, the 

 gland in somite v appears as if almost connected with 

 the salivary glands surrounding the pharynx, part of 

 the latter being arranged around the same muscular 

 band (fig. 2, s. gl. m.). All these septal glands are 

 attached to the oesophagus and probably empty into it. 

 The contents of the septal gland cells consist of dark 

 irregular spha^roid bodies, almost completely hiding the 

 nuclei and the cell-walls (fig. 6). 



Alimentary canal (fig. i and 2), There are a buccal 

 region, a pharynx, oesophagus, a tubular region and a sac- 

 culated intestine. Gizzard and typhlosole are wanting. The 

 buccal region has very thin walls and is as usual revers- 

 ible. Posteriorly it connects with the pharynx which is 

 very large and muscular and ends in the end of somite 

 ii. The pharnyx is exceedingly muscular, but developed 

 only on the upper side above the oesophagus. A section 

 through a contracted worm shows the pharynx folded 

 back on itself forming a set of three sinuses of which 

 the middle one is the longest (fig. 2), and the two others 

 of varying length according to the exact region through 

 which the section is made. 



This muscular pharynx is supported by a large number 

 of muscular bands, which connect the pharynx with the 

 parietes of the somites iii-vii. The anterior ends of 

 these muscular bands are arranged in three circular rows 

 corresponding to the septal lines, the septa themselves 

 here being wanting. In every such row there are from 

 3 to 4 pairs of muscular bands. In a longitudinal sec- 

 tion one each of these bands comes in view, making 3 

 appear as upper and 3 as lower ones, while a fourth one 



