CALIFORNIA EUDRILID^E. 57 



PAPERS REFERRED TO. 



Bkiiiiam, W. Blaxlanii. An Attempt to Classify Earthworms. Quarterly .loiiniiil of Microscopical Science, vol. 

 xxxi, pt. ii. 



Bkniia.m, W. Blaxland. The Nei>hriiliiim of Lumbricnis, etc. Quarterly .Jouniiil of Mierosciipical Science, xxx, 

 ii, 1891, 29:i. 



Bexiiam, W. Blaxland. Description of Three New Species of Earthworms. Proceedings of the Zoological Society of 

 Loudon, Feb. 10, 1802. 



Beddari), Frank E. The Classifioatimi and Distribution of Earthworms. Proceedings of the Royal Physical 

 Society, Edinb., 1891. 



Bf.hdarij, Frank E. On the Earthworms collected in Algeria and Tunisia. Proceedings of the Zoological Society 

 of Loudon, January.'}, 1892. 



Bkooarii, Frank E. Some New or Little Known Uligocha'ta. Proceedings of the Royal Physical Society, Edinb., 

 Juno i;{. 189.3. 



Bo0BN, A. G. The Nephridia of Leaches. Quarterly Journal of Microscopical Science, vol. xxxiv, 592. 



EisE.N Gi'.sTAV. California Earthworms of the family of Eudrilida^. Zoe, a Biological Journal, S.an Francisco, Cali- 

 fornia, vol. iv, No. 3, 1893, pp. 248-2.'i4. 



Fletcher, J. J. Notes on Australian Earthworms. Proceedings Linneau Society of New South Wales, vii, .374. 



MiriiAEL.SEX, W. Oligoch.-pteu von SiUl Georgien. .Jahrbuch der Wissenschaftlichen Anstalteu zu Hamburg, 1887. 

 Hamburg, ISSS. 



Ro.SA, Dr. Daniele. I Terricoli Argentini, etc. Aunali del Museo Civico di Storia Naturale de Genoa, ser. 2, 

 vol. ix, 309, 1890. 



Ro.SA, Dr. Daniele. Sui Generi Pontodrilns, Microscolex, Photodrihis. Bol. Musei, etc., di Torino, No. 39, vol. 

 iii, 18S8. 



Rosa, Dr. Daniele. Microscolex Modestus. Bol. Musei, etc., di Torino, No. 19, vol. ii, 1887. 



EXPLANATION OF THE FIGURES. 

 deltania elegans, Pigs. 1-20. 



1. A medium sized worm, natural size. 



2. The anterior part magnified, seen from the ventral side, to show arrangement of seta' and the exterior pores of 



various organs, p. n. p. the tii-st three pepto-nephridio-pores in somites ii, iii and iv. n. p. nephridio-pores 

 of the following somites, opening in front of the 3d setfe, the pepto n. p. oijeuing in front of the 4th setw. 

 o.p. ovipore. s. pd. p. spermiducal pore. 

 In order to show the outer setis, the body has been slightly flatteued out. In reality the outer seta' should be 

 slightly more dorsal than what apj^ears. 



3. The prostomium with somites i and ii. 



4. Schematic view of the arrangement of the setrt: on both sides of the male pore. The italic numerals indicating 



the order of the seta\ the roman numerals indicating the number of the somites. 

 ."). The interior of the ventral surface of the genital somites viewed from above, showing the arrangement of 



the generative organs, etc. s/)<A. spermathecaa. c. r. ciliated rosettes, sp.s. sperm-sacs. sp.d. spermducts. 



ov. ovary, od. oviduct, p. s. penial seta> and sacs. pr. prostate, v. >/l. ventral ganglion. /. testes. 

 6. Longitudinal section of the anterior part of the Ijody. The posterior section is a little more eccentric than 



the anterior, hr. brain, si. r/t. salivary glands, s.ijl. septal glands, phx. pharynx, s. plx. sigmoid i)lexus 



of the (fcsophagus. Kp. x. sperm-sacs. h. hearts, do. dorsal vessel. I. i. tubular intestine, s. /. sacculated 



intestine, pr. prostate, s. ps. sacs with penial setie. v. <jl. ventral ganglion, as. oesophagus. splh. 



spermatheca. (. testes, c. r. ciliated rosettes, ov. ovary, od. oviduct. 



8. Prostate and male aj^paratus. pr. prostate, sp.d. spermduct. /<.•■■. peuial seta> and sacs. nu. longitu- 



dinal muscular layer of the body wall. 



9. Oviduct in xiv and xiii. 



