58 
26. 
46. 
47. 
48. 
CALIFORNIA ACADEMY OF SCIENCES. 
One of the septal glands in somites vi, vii, viii and ix. 
Ciliated rosettes. 
Ovary. 
Spermatheca. 
Exterior male-pore and penial papille. 4 male-pore. p.s. penial set and papilla. 
Exterior view of the clitellum seen from the ventral side. op. ovipore. 4 male and prostate pore. 
One of the regular set. 
Penial set from somite xvil. 
Testis from somite x. 
Nephridium from somite xv. 
Anterior nephridium from somite il. 
A nephridio-stome from one of the posterior nephridia. 
DELTANIA TROYERI, Figs. 21-38. 
Diagramatie view of the regular arrangement of the set# in several somites posterior to the clitellum. 
A medium size worm. 
The largest specimen. 
The anterior part seen from above, showing prostomium and somites i, ii, iii. 
Schematic view of the arrangement of the inner sets in the region on both sides of the male-pore. ovp. ovi- 
pore. p.s. penial sete. 4 male-pore. 
The outside of the male genital region. f. folds in the body-wall. p.s. penialset#. p.p. penial sete papilla. 
pr. and 4 prostate and male-pore. c.d. cupshaped concave region or sucker near the male-pore. c. c. 
central cavity between the male-pores. m. st. place for missing setw No.1. s. st. seta No.2. p. m, penial 
muscles, arranged fanshaped, connecting the male-pore with the intersegmental groove. 
Longitudinal section of the anterior part of the body. b.c. buceal cavity. phnx. pharynx. si. gl. salivary or 
pharyngeal glands. br. brain. s. gl. septal glands. s. ple. sigmoid plexus of the esophagus. sp. s. sperm- 
sacs. @s. esophagus. ¢. testes. spth. spermatheca. 
Somewhat schematic view of the alimentary canal seen from above. es. cesophagus and pharynx. - sl. gl. 
salivary gland. s. gl. septal gland. d. v. dorsal vessel. A. hearts. ¢. 7. tubular intestine. s. i. sacculated 
intestine. 
Brain and yentral ganglion. 
One pair of the septal glands (vi). 
Spermatheca from ix. Side view. 
Spermatheca seen from below. 
Spermatheca seen from above. 
Male apparatus. pr. prostate. p.s. penial sacs andset#. sp. d. spermduct. ms. muscles of the body-wall. 
Nephridium from somite xy. 
Oviduct and ovisae, left side. 
The same from the same individual, but from the right hand side of the ventral ganglion. 
The same sac seen from above. 
Detail of the same. 
Arrangement of the set surrounding the spermathecal pores. 
DELTANIA BENHAMI, Figs. 40-48. 
Arrangement of the sets surrounding the spermathecal and male-pores. The same proportion and Scale as in 
the preceding figure. 
Sperm-sac. 
Spermatheca, left side. 
Spermatheca, right side of the same individual. 
Oviduct. 
Prostate gland and penial set. v.v. blood vessel covering the prostate. 
Alimentary canal. pha. pharynx. sl. gl. salivary glands. ss. gl. septal gland. @s. cesophagus. s. i. saccu- 
lated intestine. c.i. contracted part of the intestine generally commencing somewhere between somites xxvii 
to xxxyi and continuing towards the tail. In the first six somites the contraction is generally much narrower 
than in the following. 
The worm natural size. 
The male papill on somite xvii, showing the projecting penial sete. The upper shaded part is the clitellum 
proper which ends at the center of the somite in line with the male-pore. 
