312 ALFRED GIBBS BOURNE. 
hood much corrugated. Sometimes after the animal has been 
killed in spirit a conical papilla is formed, at the top of which 
lies the actual pore. No other papille are ever found in this 
region. 
The oviducal pores lie between Segments x1 and xu, slightly 
nearer the median ventral line than the male pores, and there- 
fore almost exactly in the direction of the inner seta couples 
(fig. 15). The pores are exceedingly minute, and are indeed 
hardly recognisable. The corrugations of the surface above 
mentioned extend as far as the oviducal pores (fig. 15). 
The spermathecal pores lie between Segments vii and vit, 
and very slightly ventrad of the outer seta row. They are 
easily recognisable, and appear to lie upon a little eye-shaped 
piece of tissue which is inserted between the two segments 
(figs. 15 and16). Here, as in the case of the male pores, little 
papillz may stand out with the pore upon the apex. 
Bopy-watt, Bopy-cavity, anD Septa—Muscutar System. 
Body-wall.—The body-wall is very thick in the anterior 
region, but is everywhere else very thin compared to what it is 
in many worms. 
The cuticle presents the usual characters. 
The structure of the epidermis is very clear and distinct. 
Five kinds of cells occur in the epidermis—ordinary epidermic 
cells, sensory cells, and three kinds of gland-cells, viz. (1) 
goblet-cells, (2) short club-shaped cells, and (3) long club- 
shaped cells. 
Setting aside the sensory cells, it is only necessary to dis- 
tinguish between the clitellar segments and the non-clitellar 
segments or main portion of the worm. 
In a non-clitellar segment the only glands present are the 
goblet-cells (fig. 18, gob.). These occur in great numbers in 
the middle of the segment, but are absent from the interseg- 
mental grooves (fig. 59). They are as numerous in the inter- 
annular grooves as elsewhere. The ordinary cells are rather 
shorter in the intersegmental grooves than elsewhere, and 
