636 W. M. SMALLWOOD AND ELIZABETH G. CLARK 



enlarges to become continuous with the sheath of the penis, which, 

 in turn, communicates with the genital atrium (atr.gen.). 



The female genitalia are more complex. They may be roughly 

 divided into two parts; the uterine or oviducal portion, and the 

 portion specialized for the reception and storage of sperm, which 

 is in direct communication with the oviduct. The oviduct 

 leads from the bifurcation of the hermaphroditic duct directly 

 to the albumen gland {gl.alhm.), a large mass of closely convo- 

 luted tubules constituting the posterior portion of the anterior 

 genital mass. From the albumen gland the duct passes forward 

 into the mucous gland {gl.muc), and terminates in the vagina 

 (vg.), which is a single broad tube leading to the atrium. The 

 mucous gland has a distinct duct {dt. gl.muc.) leading to the genital 

 atrium. At its deep end the vagina expands into a rather large 

 globular sac, which seems to be filled with detritus and a few free 

 spermatozoa; this is the ' spermatotheca' of Bergh. About half- 

 way between the external opening of the vagina and the spermato- 

 theca a much smaller pear-shaped sac (sp.cys.) with thicker walls 

 is connected with the vagina by a simple duct. This sac is the 

 spermatocyst. It contains large numbers of spermatozoa. Just 

 beneath this spermatocyst, on the ventral side of the vaginal tube, 

 is the orifice through which the oviduct communicates with the 

 vaginal portion of the female genitalia. 



BIBLIOGRAPHY 



Bergh, R. 1878 Untersuchung der Chromodoris elegans und villafranca. Mala- 

 kozool. Bliitter fur 1878, pp. 1-36, Taf. 1 und 2. 



1892 System der nudibranchiaten Gasteropoden. In Karl Semper's 

 Reisen im Archipel der Philippinen, Theil 2, Bd. 2, Heft 13, pp. 993-1165. 

 Also separately, Wiesbaden: Kreidel, 173 pp. 



Eliot, C. 1910 A monograph of the British Nudibranchiate MoUusca, Part viii 

 (Supplementary). London, Ray Society, 198 pp., 8 pis. 



Heilpuin, a. 1889 The Bermuda Islands. Philadelphia [vi] + 231 pp., 17 pis. 



Smallwood, W. M. 1910 Notes on the Hydroids and Nudibranchs of Bermuda. 

 Proo. Zool. Soc, London, Pt. I, pp. 137-145. (Contrib. Bermuda 

 Biol. Sta. No. 18.) 



