60 W. OC. MCINTOSH. 
Schmarda’s Euphrosyne polybranchia, in which the region 
presents a series of frills posteriorly and only two papille or 
bosses in front. 
Behind and above the rounded muscular mass of the pro- 
trusible pharynx is a chamber with thinner walls, and having 
laterally a series of well-marked ruge (e). This chamber may 
represent the stomach, as Ehlers states, and it is connected 
with the intestine at d as above mentioned. 
The mouth (Pl. 6, figs. 3 and 7, w) opens on the ventral 
surface between the third and the fifth segments, as Ehlers 
describes in E. racemosa, and the walls of the buccal chamber 
are thrown into many complex folds (wf.) which externally 
have a cuticular coat. These folds are continuous with the 
walls of the proboscis. In transverse section the latter pre- 
sents in front a closely interwoven series of muscular fibres 
chiefly circular and oblique, though vertical also occur. More- 
over, large blood-vessels are visible ventrally at the sides. The 
eversible portion of the organ has both inner and outer sur- 
faces coated with the cuticle (which is stained), and the finely 
granular and streaked hypoderm beneath is well marked, 
besides certain muscular fibres passing into the bases of the 
papille. In all probability it is the latter processes which 
Schmarda describes as horny teeth in Euphrosyne poly- 
branchia. 
The buccal chamber gradually enlarges into a flattened canal 
above (i.e. dorsal of) the posterior portion of the great mus- 
cular “stem” of the proboscis. The latter (stem) is com- 
posed of a complex series of fibres, the ventral being chiefly 
arranged in parallel and vertical bundles, and bounded by a 
definite investment, a few longitudinal fibres being clasped in 
the interstices. Moreover, this region is cut off by a thin cuti- 
cular septum from the part above. Then the median region is 
occupied by a dense mass of glandular tissue (Pl. 6, fig. 7, gi.), 
the glands being large and granular and extending to the hypo- 
dermic coat which, with the cuticle, bounds the chamber now 
present in the organ at this part. These glands apparently 
perform an important part in the functions of the region. The 
