PACIFIC COAST OLIGOCHATA. Le 
eo 
we 
Typhlosole small, 
Sperm-sacs in xi and xii. 
Spermducts not thickened in the somites near the pores. 
Prostates are larger than in B. nana, but mostly confined to one somite each, 
Spermatheee in yii-vili and vili-ix. The two divisions are of equal size, and 
globular; small tubercular diverticle pointing forwards. 
Nephridia in three distinct rows on either side of the median line. Nephri- 
dium @ nearest the ventral ganglion consists of two unequal parts, the most ventral 
of which is the smallest. These two parts together are much larger than either of 
the other two nephridia. The dorsal nephridia are far apart. 
DETAILED DESCRIPTION. 
Body-wall and sense organs. We find the same zone of sense organs in the 
body-walis as in B. nana. In B. palmicola this zone is found in all the somites, 
while in B. nana I found none in somite i. 
The sense-organ zone with pellucid cubie cells is in this species larger than in 
B. nana, and stands out most prominently on the upper side of the buccal cavity. 
Septal glands. As has already been stated small septal glands are found in 
somites ix and x or posterior to the gizzard. These glandular masses are quite small, 
are situated in the anterior part of the somite, close to the intestine, but hardly pro- 
jecting above the latter. I cannot find that they are in anyway connected with the 
pharyngeal system of glands. 
Intestine, etc. The portion of the pharynx is not far forward. The region of 
its epithelial columnar cells is thick and the discharge chambers of the pharyngeal 
glands are tubular, instead of globular as in b. nana. The pharyngeal glandular 
mass is less lobed than in B. nana. 
The region between somite iand pharynx is much longer in B. palmicola than 
in nana. The specimen sectioned longitudinally showed the two gizzards as both sit- 
uated in vill, and there was no septum separating them. If this character is constant 
is undecided as I did not wish to sacrifice another specimen. The tubular intestine 
is long and cylindrical and furnished with the regular three pairs of calciferous 
diverticula in somites xy, xvi, xvii. No lime crystals in the posterior pair. The 
sacculated intestine commences in xviii or xix. The typhlosole is smaller than in 
B. nana, but owing to sand I could not definitely ascertain its location. 
Spermathece. The four spermathece are of the same form and size. The 
contraction at the center is deep, dividing the organ in two equal, globular sacs, each 
sac being confined to one somite; that is, the apical part is situated entirely in the 
somite posterior to the pore. The basal part carries a short narrow cylindrical and 
tubular diverticulum pointing forwards. The equality in size and the globular form 
of the two parts of the spermatheca appears very constant and characteristic of the 
species. 
Sperm-sacs are sac-like, not racemose. They are found in xi and xii, while 
in B. nana they are placed in x and xi. 
