PACIFIC COAST OLIGOCH ATA. 
REFERENCE TO LETTERS ON PLATES. 
a. c. gl. anterior calcic gland. 
a. f. anverior fold of nephridium. 
a. nephr. anterior nephridia. 
a. spd. anterior spermduct 
atr. atrium. 
bd. boey-wall. 
bl. blood vessel or capillaries. 
bl. s. blosd sinus. 
br. bridge in nephridium. 
buc. buccal cavity. 
c. clusters of lunate cells. 
c. c. columnar cells. 
c. ep. eelomic epithelium. 
c. gl. ealeiferous glands. 
ch. discharge chambers of glands. 
chlo. chioragogen cells. 
cil. ciliated epithelium. 
cl. c. clitellar cells. 
cl. clitellum. 
c. m. circular muscles. 
com. commissures. 
c. r. ciliated rosettes or sperm-funnels. 
c. t. connective tissue. 
cu. euticle. 
d. gl. dark staining glands. 
d. pr. dorsal pore. 
d. v. dorsal vessel. 
e. epithelial cells. 
ept. epithelium. 
gl. glands. 
gl. c. unicellar glands. 
_ gl. pr. glandular part of prostate. 
giz. gizzard. 
h. heart. 
hy. hypodermis. 
i. s. gr. intersegmental groove. 
1. c. large cells. 
l. m. longitudinal muscles. 
m. muscles. 
m. atr. muscular atrium. 
mes. mesenteric tissue 
m. pr. muscular prostate. 
n. nephridia. 
mn. c. nerve cells, 
ne. nerve ganglion. 
nec. neck of nephridium. 
neph. nephridium. 
neph. p. nephropore. 
ws. esophagus. 
ov. ovary. 
ovd. oviduct. 
org. sense organ. 
p.c. gl. posterior calciferous diverticulum. 
p. f. posterior fold, nephridium. 
phx. pharynx. 
p- neph. posterior nephridia. 
pr. prostate. 
p. spd. posterior spermduct. 
pr. sto. prostomium. 
ps. penial seta. 
prt. peritoneum, 
se. secreted matter. 
s. int. sacculated intestine. 
sep. gl. septal gland. 
sep. septum. 
s. gl. suprapharyngeal glands. 
s. org b. sense organ cells in equatoreal zone. 
8. org. pr. sense organ cells in prostomium. 
spe. sperm-cells. 
spd. spermduct. 
spgn. spermatogonia. 
spr. spur of nephridium. 
s. ps. Sac with penial sete. 
Sp. 8. sperm-sacs. 
s. ph. sgl. subpharyngeal glands. 
spth. spermatheca. 
spth. p. spermathecal pore. 
t. testes. 
t. m. transverse muscles. 
trb. trabecula. 
th. spd. thicker part of spermduct. 
tu. tubular intestine. 
tub p. tubercula pubertatis. 
ty. typhlosole. 
u. c. unicellar glands. 
v. g. ventral ganglion. 
v. v. ventral vessel. 
v. sgl. ventral gland. 
w. ‘‘ windings” of nephridial ducts. 
€ 
5 
