Fr 
CALIFORNIA EUDRILID. ov 
DELTANIA ELEGANS, Figs. 49-56. 
49, The lumen and coecal part of the nephridium in transverse section to the body. fl. c. ¢. flask-like glandular 
cells of clitellum. /. v. blood-vessels in the transverse muscular layer. /. m. transyerse or circular museu- 
lar layer. /. m. longitudinal muscular layer. 7. x. lumen of ccecal part of the nephridium. 7. /. interior 
lining of the nephridium. g/. glandular outer layer of nephridium. cal. calculi projected by the nephridium. 
gi.c. glandular cells of the clitellum. atr. urinary bladder or large contractile (?) chamber near the exterior 
pore of the nephridium. ms, muscular layer of the nephidial duct joining the flask-like cells of the clitel- 
lum. col. collar of the nephridium forming the exterior pore and consisting of regular layers of large, almost 
rectangular cells. 
SOA. Section through the body-wall and the lower part of a nephridium in somite xviii, but posterior to the clitellum. 
n.d. nephridio-duct. ¢.. cocal nephridio-bladder. /. m. longitudinal muscles. c. m. circular muscles. 
ep. epidermis and cuticle, 
50B. Section through the body-wall and the nephridial collar in a somite posterior to the clitellum, illustrating the 
large ganglion (?), below the nephridial collar. ‘The section shows the beginning of the nephridial collar and 
the place where it joins the ccecal vesicle. 
500, Section closely following the former nearer the nephridio-pore, showing a larger part of the ganglion. i. ¢. 
interior chamber or tubule, probably opening into the nephridial caecum. ¢./. inner lining of the cecal 
bladder. m. . muscular layer of the bladder. — ¢. np. collar of nephridium. 7. g/. nerve ganglion. /. m. 
longitudinal muscular layer of the body-wall. ¢. m. transverse layer of the body-wall. h. hypodermis. 
51. Lower part of the prostate and penial sac, section through the male-pore, showing the junction of one of the 
penial sacs with the prostate. p.s.s. penis sac with set. p.s. one of the penial setw broken. pr. 
and ps. prostate and male-pore. pr. d. prostate duct. 
2. Section through the male-pore, cross-section through the body-wall, showing junction of the two spermducts, 
and prostate, and one of the penis sacs. sp. d. spermducts. j. sp. junction of spermducts. pr. prostate. 
Jj. sp. and pr. junction spermduct and prostate. s. ps. sac of penial sete. j. pr. and p.s. junction of prostate 
or 
and penal set. ¢ male-pore. ep. epidermis. c. m. layer of circular muscles, body-wall. 1. m. layer of 
longitudinal muscles, body-wall. x. c. nerve cord from ventral ganglion. p. p. penial papilla. 
53. Section through the male-pore showing junction of the two penis sacs with the prostate. ps. the two 
branches of the penis sac with the penis sheaths and penial sete. pr. prostate. c¢. m. circular muscles. 
l.m. longitudinal muscles. 4 male-pore. atr. atrium, or junction between the penis sacs and the prostate. 
54, Section through the muscular part of the prostate. gl. inner glandular layer. m. outer muscular layer. 
blw. blood-vessels and cuticle. 
55. Section through upper end of prostate. blv. bloodyessels. c¢. v. vessels between the inner and outer layer of 
cells. 7. v. inner capillary vessels, lining the inner surface of the prostate. 
56. Section through prostate at the junction of the muscular and glandular part. m. pr. muscular prostate; other 
letters same as in Fig. 54. 
57A. Section through intestine in somite xv. ch. 1. chloragogic layer. J. m./. longitudinal muscular layer. v.l. 
vascular layer. b/v. blood-vessel of the epithelium. ep. epithelial layer. 
57B. Section through intestine, somite xiv. 
57C. Section through intestine, somite xvi. 
58. Cross-section through the clitellum, showing the relative size of the various layers. 
ARGILOPHILUS MARMORATUS ORNATUS, Figs. 59-130. 
59. A nephridium from one of the somites posterior to the clitellum. ~*0, inner orifice or nephridio-stome engaged 
in the muscular dissepiment d. 1, narrow duct connecting the funnel with the fold. p. Jf. posterior 
fold. a. /. anterior fold. uw. upper part of the spongy duct, which at 15 stands in direct connection with 
the narrow tube 1. J. lower part of the spongy duct gradually increasing in size towards 5, a. upper main 
canal. b. lower main canal, both the upper and the lower being different ends of the same canal. 0. Culfs 
point of recurrence. p.c. peritoneal cell covering or support of the nephridium. x. p. nephridio-pore. 
c. t. capillary tubules of the spongy duct. 6/. blood-yessels. cap. capillary blood-vessels surrounding the 
canals ~@and b. 1 to 17 mark places from which the detail drawings are taken. The nephridium is longer in 
proportion to its thickness than what is shown in the figure. If the part between the two parallel lines at 
18 was increased to about one-third or one-fourth the entire length of the nephridium the proportion would 
be correct. If the whole nephridium had been drawn the figure would haye been too long for the plate. 
60. Nephridio-stome, front view. 
61. Nephridio-stome, side view. 
62. Nephridio-stome, end view. 
* Letters and figures in full-face type refer to those in rings on the plates. 
