ANATOMICAL STRUCTURE OF KERRIA. 299 



than in Ocnerodrilus and when contracted forms only 

 one single fold, instead of three and four as in Ocnero- 

 drilus. The walls are as thick as in that genus, and the 

 inner epithelial lining is strongly ciliated. The upper 

 part of the pharn3^x is covered with a dense mass of 

 muscular bands. 



Salivary or ^pharyngeal glands (figs, i and 2). To 

 about two-thirds of their length these muscles are thickly 

 coated with salivary glands of similar nature as those 

 found in Ocnerodrilus, though the whole mass appears 

 more compact and regular in outline than in the latter 

 genus. Seen in a longitudinal section there appears to 

 be only two distinct bodies of pharyngeal glands, one 

 posterior and one anterior, both confined to somite iv. 

 The two glandular masses are of almost equal size, and 

 are very much rounded superiorly. The posterior mass 

 exhibits several distinct lobes, no one of which, however, 

 projects much further backward than the other. Seen 

 from above the glandular mass is found to be similarly 

 compact with few and small projecting lobes. The mus- 

 cular bands around which these glands are arranged are 

 very similar to those described in Ocnerodrilus. There 

 are seven of these large muscular trunks on either side 

 projecting sideways. Two of them connect with the 

 body-wall of somite iv, two with somite v, one with somite 

 vi and two with vii. Owing to the very lateral position 

 of these muscular trunks they are not seen in a strictly 

 central section, but only in extra central ones. The 

 muscles are attached to the pharynx in the same way as 

 in Ocnerodrilus, that is they follow the septal depressions 

 of the pharynx, some being more lateral or central than 

 others. The posterior and most central pair of these 

 muscular bands does not attach to the septal glands in 

 somite v, as they do in Ocnerodrilus, but pass independ- 



