84 CALIFOIlNrA ACADEMY OK SCIENCES. 



'i'liat tlu' filaiidiilar crop really exists in P. Mnrionis is evident from Penier's drawinir 

 (fig. 22, pi. xvi), llioiigli I eannot accept the e|)itiieiial nature of the cells. Peirier 

 says nothing of the place t'roni wliieli this drawing is taken, Imt I snspect that it was 

 from a section of (he intestine between the tubular and sacculated parts, similar as in 

 /'. Michaeheni. 



LITEKATURE. 

 Bkddard, Fr. E. Abstract on Some Investigations into the Structure of the Oligocha^tn. Ann. Mag. Nat. Hist. 



.Ian., IS'M, p. 06. 

 ISkddakii, Fk. E. Some New or Little Known Oligochirtn. Proeeeiliugs of the Koyal Physical Society, Edinburgh, 



.Inne 1.3, 1893. 

 Bkiioari), Fk. E. On the Anatomy of Ocnerodrilus. Proc. IJoynl Society of Edinburgh, vol. xxxvi, p. 'yd^. 

 MicHAKUSEX, W. Terricolen iler Berliner Zoologisclien Samnilimg II, page 14. 

 Bkniiam, W. B. An Attempt to ('lassify Earthworms. Quarterly Journal of Microscopical Science, vol. xxxi, 



part ii, page 243, etc. 

 Rosa, Danikle. Sui Generi Pontodrilus, Microscolex, e Photodrihis. Boll. Mas. Torino, vol. iii. 

 Rosa, Daniele. Die Exotischen Terricolen des K. K. Naturhist. Wieii. Annal. K. K. Nat. Hofmiis. Wieu, Bd. vi, 



p. 387. 

 ElSKN, G. Aniitomioal Studies on New Species of Ocnerodrilus. Proc. C'al. .\cad. Sci., ser. 2, vol. iii. 

 EisHN, (i. Anatomical Stnu-tnie of Two Speiies of Kerria. Proc. Cal. Acad. Sci., ser. 2, vol. iii. 

 Pkrrikr, Edmonu. Etudes sur rOrgauisatioii des Lombricicus Terrestres. IV Pontodrilus. Archives Zoologie 



Experimental, vol. ix, images 175 to 248, pi. xiv. to xviii. 



Eclipidrilus frigidus Eisen. 



Through the kindness of a friend traveling in Sierra Nevada I have received a 

 small number of specimens of this interesting oligoclnvta, but unfortunately all the 

 specimens were in a poor state of preservation and much macerated. However 

 I was enabled to make several very nearly continuous series of sections and thus settle 

 several very important points in the anatomy of tliis worm. My former study of the 

 species was entirely dependent on di.ssection, which could not possibly reveal all the 

 details of this minute species, es]>ecially as regards the spermducts, the presence of 

 which I am now able to demonstrate. My present researches show that the species 

 is less erratic in its anatomy than I first supposed, while again in many respects it 

 (lifTers .strangely from its nearest allies, the various genera of Liiml)iiculida\ For 

 the present I retain the family of Eclipidrilidiv, but not on the same grounds as 

 formerly, and I now consider it rather as a subfamily to Lumbrieulidic than one 

 standino' Isolated, however with strons; leaning towards INIonilioaster. 



The generative organs are situated as follows: 



Testes, two pair. TIic antcrinr pair attached to the anterior septum of somite 

 ix. The posterior pair similaily to the aiitiTior sL'ptinn in somite x. 



Ocari/, one pair attached to the anterior septum of somite xi. 



Oviduct in xii, opening in front of the inner pair of settp. 



Spermathecce, one pair in ix opening po.sterior to the .seta' and near the posterior 

 septum. 



Atrinm and prostate, one pair opening in x, po.sterior tti the inner pair of seta\ 

 'i'liis organ, which is very long, occupying seven to eight somites, consists of three 

 parts, first, one anterior atrium and prostate proper, .secon<l, a thin and narrow pari 



