PELTODORIS GREELEYI MAC FARLAND 87 



XV, fig. 82, spth.). Below, wedged in between the spermatotheca 

 in front and the albumen gland behind, appears the surface of 

 the glistening white hermaphroditic ampulla. Encircling the 

 spermatotheca and this ampulla is a lobulated mass, the prostate 

 gland (PI. XV, fig. 82, pr.). Posterior to the hermaphroditic 

 ampulla and the spermatotheca, the inner face of the anterior 

 genital mass is made up principally of the albumen gland, finely- 

 convoluted and of a light yellow color, surrounded above, behind 

 and below by the thicker convolutions of the pinkish nidamental 

 gland. The lower posterior border of the complex is occupied by 

 a broad convolution of the nidamental gland, which is of a 

 reddish hue, markedly distinct from the remainder of the mass. 

 In the figure 82 of Plate XV, the nidamental and albumen glands 

 have been dissected away, and are not shown. 



Hermaphroditic ampulla. The hermaphroditic duct dilates 

 into its glistening white ampulla, midway of the inner face of 

 the anterior genital complex. This ampulla is somewhat lunate 

 in form, curving downward in a groove between the spermato- 

 theca and the albumen gland, thence outward and upward upon 

 the external face of the complex to a point immediately below 

 and in front of the spermatocyst, where it narrows suddenly, 

 gives off the spermatic duct (PI. XV, fig. 82, sp. d.), and passes 

 inward and upward into the nidamental gland. 



Prostate gland and penis. The very short spermatic duct 

 passes at once into the large lobulate prostate gland (PI. XV, 

 fig. 82, pr.), overlying and forming the whole of the front sur- 

 face of the complex. From its superior surface is given off the 

 relatively long vas defenens (PI. XV, fig. 82, v. def.), which 

 describes an irregular loop, free from the surface of the anterior 

 genital mass, above its antero-median transverse groove, and 

 passes downward and outward into the praeputium. The prae- 

 putium is 1.5 mm. long by i.o mm. in maximum width, tapering 

 inward to the vas deferens. Within it is inclosed the retracted 

 glans penis, cylindro-conical in form, its length 0.78 mm., its 

 greatest diameter 0.16 mm., tapering gradually to a truncate 

 tip with a terminal diameter of 0.009 mm., smooth and entirely 

 unarmed. 



