DISCODORIS BRANNERI MAC FARLAND 71 



The vaginal duct is whitish, muscular, of nearly uniform 

 diameter, and 4.0 mm. in length. It describes a loop (PI. XII, fig. 

 65), returning upon itself and opening into the spermatotheca 

 (PI. XII, 65, spth.~), which is a conspicuous dark spherical 

 structure, 2.0 mm. in diameter, lying in the mid-dorsal region of 

 the anterior genital complex. Upon its dorso-anterior face is 

 the common opening of the vaginal and the uterine ducts, con- 

 cealed by the overlapping proximal end of the vagina. The 

 uterine duct (PL XII, fig. 65, u. d.) is slightly the more slender of 

 the two, and passes obliquely forward along the inner face of 

 the nidamental gland, beneath the sack like spermatocyst, which 

 is doubled above it. Near the anterior end of the nidamental 

 gland the uterine duct receives the short slender duct of the 

 spermatocyst (PL XII, fig. 65, sp. c.}, an elongated pear-shaped 

 organ of a whitish color, 1.5 mm. in length by i.o mm. in 

 diameter, and closely packed with spermatozoa. Its slender duct 

 is slightly less than one-half the length of the cyst itself. 



Nidamental gland. The uterine duct passes into the anterior 

 end of the nidamental gland (PL XII, fig. 65, n. a. c.), immedi- 

 ately after receiving the duct of the spermatocyst, and at a point 

 not far from the entrance of the oviduct, which joins the anterior 

 end of the hermaphroditic ampulla to the nidamental gland. 

 In most Dorididae the greater portion of the anterior genital 

 complex is made up usually of the nidamental and the albumen 

 glands. In this individual the two glands in question form but a 

 very small portion of the whole, being but 2.0 mm. in extreme 

 length by 1.2 mm. in width and i.o mm. in thickness. This 

 proportion may possibly be due to absence of secretory activity 

 in a non-breeding season, or to non-maturity. The surface of 

 the nidamental gland is finely sculptured with minute ridges and 

 depressions, is pinkish in color, and opens externally, immediately 

 below and behind the opening of the vagina, by means of a broad 

 duct (PL XII, fig. 65, n. </.), 1.5 mm. in length. The albumen 

 gland is included in the windings of the nidamental gland, being 

 exposed as a small oval area, i.o mm. in length by 0.3 mm. in 

 width, upon the upper face of the larger gland. At the anterior 

 border of this area is found the entrance of the uterine duct. 



The systematic position of th;s species presents some dif- 

 ficulties due mainly to the well-developed penis armature, a 



