CALIFORNIA EUDRILID®. 57 
PAPERS REFERRED TO, 
Benuam, W. Braxtanp. An Attempt to Classify Earthworms. Quarterly Journal of Microscopical Science, yol. 
XXX, pt. li. 
Benuam, W. Buaxtanp, The Nephridium of Lumbricus, ete. Quarterly Journal of Microscopical Science, xxx, 
li, 1891, 293. 
Benuam, W. Buaxtanp. Description of Three New Species of Earthworms. Proceedings of the Zoological Society of 
London, Feb. 16, 1892. 
Bepparp, Frank UW. The Classification and Distribution of Earthworms. Proceedings of the Royal Physical 
Society, Edinb., 1891. 
Bepparp, Frank E. On the Earthworms collected in Algeria and Tunisia. Proceedings of the Zoological Society 
of London, January 5, 1892. 
Brpparp, Frank FE. Some New or Little Known Oligochwta. Proceedings of the Royal Physical Society, Edinb., 
June 13. 1893. 
Bourn, A.G. The Nephridia of Leaches. Quarterly Journal of Microscopical Science, vol. xxxiv, 592. 
Eisen Gustay. California Earthworms of the family of Eudrilidw, Zoe, a Biological Journal, San Franciseo, Cali- 
fornia, vol. iv, No. 3, 1893, pp. 248-254. 
Friercner, J. J. Notes on Australian Earthworms. Proceedings Linnean Society of New South Wales, vii, 374. 
Micnarsen, W. Oligochwten yon Siid Georgien. Jahrbuch der Wissenschaftlichen Anstalten zu Hamburg, 1887. 
Hamburg, 1888. 
Rosa, Dr. DanteLe. I Terricoli Argentini, etc. Annali del Museo Civico di Storia Naturale de Genoa, ser. 2, 
vol. ix, 509, 1890. 
Rosa, Dr. Daniete. Sui Generi Pontodrilus, Microscolex, Photodrilus. Bol. Musei, ete., di Torino, No. 39, vol. 
iii, 1888. 
Rosa, Dr. Dantete. Microseolex Modestus. Bol. Musei, ete., di Torino, No. 19, vol. ii, 1887. 
EXPLANATION OF THE FIGURES. 
DELTANIA ELEGANS, Figs. 1-20. 
. A medium sized worm, natural size. 
2. The anterior part magnified, seen from the ventral side, to show arrangement of set and the exterior pores of 
various organs. p.n.p. the first three pepto-nephridio-pores in somites ii, iii and iy. n. p- nephridio-pores 
of the following somites, opening in front of the 3d set~#, the pepto n. p. opening in front of the 4th seta. 
0. p. ovipore. s. pd. p. spermiducal pore. 
In order to show the outer sets, the body has been slightly flattened out. In reality the outer set should be 
slightly more dorsal than what appears. 
3. The prostomium with somites i and ii. 
4. Schematic view of the arrangement of the sete on both sides of the male pore. The italic numerals indicating 
the order of the setw, the roman numerals indicating the number of the somites. 
5. The interior of the ventral surface of the genital somites viewed from above, showing the arrangement of 
the generative organs, ete. spth. spermathece. c. 7. ciliated rosettes. sp.s. sperm-sacs. sp.d. spermducts. 
ov. ovary. od. oviduct. p.s. penial set and sacs. pr. prostate. v. gl. ventral ganglion. ¢. testes. 
6. Longitudinal section of the anterior part of the body. The posterior section is a little more eccentric than 
the anterior. br. brain. s/. gl. salivary glands. s. gl. septal glands. phx. pharynx. s. plx. sigmoid plexus 
of the esophagus. sp.s. sperm-sacs. h. hearts. dv. dorsal vessel. ¢.i. tubular intestine. s. i. sacculated 
intestine. pr. prostate. s. ps. sacs with penial set. v. gi. ventral ganglion. es. esophagus. spth. 
spermatheca. ¢. testes. c. r. ciliated rosettes. ov. ovary. od. oviduct. 
8. Prostate and male apparatus. pr. prostate. sp. d. spermduct.  p. s. penial sete and sacs. ms. longitu- 
dinal muscular layer of the body wall. 
9. Oviduet in xiy and xiii. 
