326 THE DOLABELLINAE. 



2. Small hermaphroditic duct. 



3. Adnexed genital complex, consisting of the nidamental and albumen 

 glands, the fertilization-chamber, and the convoluted and spiral portions of the 

 genital duct. 



4. Spermatocyst and duct of Cuvier. 



5. Large hermaphroditic duct, made up of the ovospermatic and the 

 copulatory ducts. 



6. Spermatotheca and its duct. 



7. External spermatic groove. 



8. Penis and its sheath. 



Ovotestis. — The ovotestis occupies the posterior end of the body-cavity, 

 in close contact with the liver in front and the body-walls elsewhere. In con- 

 sequence its anterior face is irregularly faceted from the pressure of the liver 

 and of the loops of the small hermaphroditic duct and the adnexed genital com- 

 plex. The remainder of its surface is convex, conforming with the contour of 

 the body-walls, its general form being nearly hemispherical. Its extreme 

 antero-posterior length is ca. 23.0 mm., its diameter 35.0 mm. The yellowish 

 gray color of the ovotestis contrasts strongly with the uniform black of the 

 Uver in contact with it. 



Plate 5, fig. 4 represents the main portions of the reproductive apparatus, 

 as seen from below, that view reveaUng the relations of its parts best, with but 

 a minimum amount of displacement. The ovotestis and the penis are not 

 shown in this figure. 



Small hermaphroditic duct. — From the upper right surface of the ovotestis 

 the yellowish white small hermaphroditic duct (Plate 5, fig. 4, svi. h.d.), arises, 

 the loops of its many closely coiled windings resting upon the upper anterior 

 surface of the gland. The approximate length of the duct is at least 65.0 mm., 

 though its hardened condition made the measurement difficult. Its diameter 

 averages about 3.0 mm. The general course of the duct is obUquely forward 

 and to the right, joining the very large adnexed genital complex at its right 

 posterior angle. 



Adnexed genital mass. — The dark yellowish brown adnexed genital mass 

 (Plate 5, fig. 4, a. g. m.) is strikingly large, nearly reaching the bulk of the ovo- 

 testis. In form it is irregularly prismatic, flattened somewhat dorso-ventrally 

 and elongated laterally. It is placed transversely in the posterior dorsal region 

 of the body-cavity, its thicker portion at the left, resting in a deep groove upon 

 the postero-dorsal surface of the Uver, and between it and the ovotestis, and is 

 closely bound to the dorsal body- wall by connective-tissue. 



