PACIFIC COAST OLIGOCH ATA. 14] 
Gizzard is in v. 
Calciferous diverticula, three pairs, one each in vii, viii and ix, all of the same 
structure. 
Sacculated intestine commences in xix and furnished with a typhlosole. 
Spermathece in viii and ix with a few warty diverticula, one of which is 
larger and furnished with two swellings. Spermathecal pores in front of sete 1 and 
2. The spermathece are large, filling the space between the septa on the ventral side 
of the body. No spermathecal copulary sete. 
Sperm-sacs sac-like, not racemose, occupying the whole space left in ix—xii. 
Prostates much folded, opening with penial setz; each prostate confined to 
one somite each, the free distal end pointing backwards, and situated close behind the 
male pore. 
Nephridia, strictly meganephridia, not alternating. 
DETAILED DESCRIPTION. 
Each prostate pore is situated on a round globular papilla, between which and 
the male pore runs a copulatory fossa. In xvi and xx there is in each a copulatory 
ridge, running parallel with the intersegmental grooves and somewhat longer than the 
space between sete 2 and 2 (fig. 91). There is a shorter ridge in xviii extending 
between the male pores. 
The prostomium and somites i and ii are transversely suleated, most so somites 
iand ii. Also somite ili shows this sulcation in a smaller degree. The anterior nine 
somites are more or less distinctly segmented in three parts, that is, they show a central 
ridge on which are situated the sete. The following posterior somites show a seg- 
mentation in five parts. In the clitellium the segmentation is clear, as far as regards 
the intersegmental grooves, but the segmentation of the somites is not very distinct. 
The supra-pharyngeal glands forma very large body, superposing the pharynx. 
It is rounded posteriorly, and consists of four larger and five smaller lobes, this when 
viewed in a longitudinal section just outside the median line (fig. 96). 
The calciferous diverticula show all the same structure. 
The spermathece are large, globular masses, as seen in figs. 94 and 95, with 
warty diverticula, one of which is much larger. The spermathece overlap each other 
and are bunched in a solid mass between the septa on the ventral side of the body. 
Testes are in two pairs, quite or very small when viewed in sections—in x and 
xi, in front of the ciliated rosettes, on the posterior face of the anterior septa. 
The ciliated rosettes or sperm-funnels are in xi and xii, and are very large, 
crimped and furnished with a wide muscular duct. The funnels in xii lie much 
higher up than the one in xi, much closer to the intestine. The posterior part of the 
funnel is very thick, and so is the duct. The ducts join and open as usual in xviii, 
The rosettes lie free, but are connected by connective tissue with the anterior septa. 
They thus point backwards. 
The body-wall is very thick, and the longitudinal muscles are not bipinnately 
arranged. The septa between vy, vi and so on until xi, xii, are much thickened, and 
thicker than the other, though the one between xi, xii is not as thick as the anterior 
