62 CALIFORNIA ACADEMY OF SCIENCES. 
115. Cross section through clitellam. gl. glandular cells with fine secretions. c. gl. glands from the hypodermis 
projecting into the former layer. /. v. blood vessels. 
116. Detail of the former, illustrating the hypodermal glands, etc. 
117. Cross section through body-wall, somite xii. Letters same as above, illustrating the arrangement of the 
longitudinal muscles. spd. spermduct. 
118. Cross section through body-wall somite xvii, illustrating the transverse muscles. 
119. Somite xiv laid open, illustrating the diagonal muscular band. ord. oviduct. s. septum. xii Xiv. ovp. ovi- 
pore. J. 2.3. 4. sete. m. 1.2. 3. diagonal muscular band, beginning and ending on the body-wall. 
m. 4. muscular band connecting the oviduct and septum with the body-wall. 2. /. nephridio-funnel. 
is. g. intersegmental groove. v. v. ventral blood-vessel. h. ventral part of the hearts. /. v. lateral vessel 
spreading on the body-wall and supplying the nephridium. v. g. ventral ganglion. £ 
120A. Cross section through one of the ventral papille of Argilophilus marmoratus papillifer. 4. c. tubular cells 
butting on the central glandular masses. c. gl. supporting and protecting cells, with coarse grainy con- 
tents. hk. common supporting cells of the hypodermal layer. /. m. longitudinal muscles. ¢. m. trans- 
verse muscles. v.J. inner vascular layer. nf. nerve ganglions, connecting the glandular masses with the 
yentral nerve ganglion. o. glandular papille with central nerve ganglia. 
120B. The corresponding organ, or ventral papilla in Argilophilus marmoratus ornatus; letters indicate the same. 
121A. Detail of the last figure showing the most lateral of the glandular masses. o. glandular masses with a 
central nerve ganglion. 
121B. Detail of the same figure showing the most centrally located glands. 
122. One of the common sete. 
123A. One of the penial sete. 
123B. The tips of the former more highly magnified. 
124. A part of the body-wall viewed from the inner side. A semi-diagramatic figure illustrating the arrangement 
of the sete and the nephridio-pores over a certain space. /, 2, 3, 4, the various rows of sete. np. p. 
nephridio-pores, indicated by round circles. Two of the nephridia are drawn in order to show their position, 
as well as the relative size of the ducts. 
125, 126, 127, 128. The anterior part of the body seen from the ventral side. Various specimens to show the 
yariation in position and number of the ventral papillw.  spth. spermathecal-pores. ovd. oviduets. 
t male-pores. The ovals indicate the ventral papille. 
129A. The clitellar and some of the anterior somites, viewed from the ventral side, showing the yarious pores and 
the genital zone. Letters indicate the same as in the preceding figures. p.s. penial sete protruding 
from the male-pores. 
129B. The twenty-three anterior somites of a specimen killed in alcohol gradually increased in strength and hardened 
in strong alcohol, showing the spermathecal, 9 and 4 pores, the ventral papillae, ete. 
1290. The most anterior somites seen from above. 
130. The two and three anterior somites of two different specimens, showing the inverted buccalic sac, the prosto- 
minum, etc. a. and c. ventral; c. d. and f. dorsal; e. lateral view. 
ARGILOPHILUS MARMORATUS PAPILLIFER, Figs. 131-136. 
131. The anterior somites viewed from below showing the single row of ventral papillew, diminishing in size an- 
teriorly. The outlines at the side represent the shape of the papille as found in the figured specimen. 
132A. A medium size specimen preserved in strong alcohol. The specimen was first killed in an increasing solu- 
tion of corrosive sublimate. 
132B. A large specimen of the former figured while alive. 
133. Section of the intestine and dorsal vessel in somite ix, in order to show the typhlosolar vessel. ¢.v. typhlo- 
solar vessel in the intestine. d.v. dorsal longitudinal vessel. ch. c. chloragogie cells of the intestine. 
e.p. epithelial folds of the inner lining, void of chylus glands. c.v. the chylus region of the inner 
epethelial lining. 
. The typhlosolar region of the intestine, detail from the last figure more highly magnified. ¢. v. typhlosolar 
lining. 7. m. longitudinal muscles of the intestine. c¢. m. cireular muscular layer of the same. Other 
letters as in the last figure. 
an 
_ 
135. Cross section of the intestine and dorsal vessel in somite xxiv illustrating the typhlosole. ss. 7. saceulated 
intestine. /. s. blood-sinuses. ty. typhlosole. 
136. Detail of the former, showing the typhlosole proper, greatly magnified. d.v. dorsal vessel. /y. typhlosole. 
bl. v. blood sinuses in the intestine. /. m. longitudinal muscles. ec. m. and e. p. cirenlar muscles and 
epithelial lining of the intestine. 
