H XUDIBRAXCHIATE GASTEROPODA. 



intestine, and ending in the renal pore inside the branchial circle to the right (pi. I, fig. i). The in- 

 side, at least of the last part of the ureter, is covered with strong, compound, and foliaceous folds and 

 papillae. The pericardio-renal organ (the renal syrinx) was powerful, pyriform, almost i cm long, 

 with strong folds on the inside. 



The hermaphrodite gland (Glandula hermaphrodisiaca) rested on the foremost right part 

 of the upper side of the liver, its upper surface completely covered and hidden by the foremost part 

 of the kidney. It was (fig. 16) meniscus-shaped, of roundish-oval contour, with a convex upper sur- 

 face, and the under surface a little concave; its diameter was about 2-6 cni by a thickness on the middle 

 of i cm ; from this middle it sloped evenly towards the not very thick, rounded, almost smooth margin; 

 the surfaces were finely knotty, the colour was gray. The surface of this gland showed everywhere, 

 especially distinct on its upper side (fig. 16), a mass of small clear, semiglobular, prominent papulse, 

 which, when slightlv magnified (fig. 17) were seen to be composed of densely crowded balls of a dia- 

 meter of 0-5 — i"5' nm , and were attached to a central mass; between and below these balls stretched a 

 system of highly ramifying and anastomotic tubes (fig. 17), the efferent ducts. The deeper parts of 

 the gland contained similar balls and tubes. The balls were ovarial follicles with eggs in different 

 stages of development, attached to a central testicular mass containing bundles of zoosperms. About 

 medianly from the foremost part of the under side of the gland the hermaphrodite duct arose stretch- 

 ing to the anterior genital mass. 



This large anterior genital mass (fig. 18) was situated on the right side of the bulbus 

 pharyngeus before the liver. Anteriorly and on the under side it was grayish , otherwise of a light 

 yellowish white colour; the length was 5 cm by a breadth of 4-i c,n and a height of 3'8 cm ; its lower sur- 

 face was slightly convex, the upper one strongly convex, posteriorly more abruptly shelving, anteriorly 

 more gradually sloping; the fore end was a little pointed, the hinder end broader and rounded. Its 

 chief part was formed by the large mucous gland (fig. 18 a); on the hinder end lay the spermatheca 

 (fig. 18 b) with its rather short duct; before and partly upon this (fig. 18) the large bag of the penis. 

 The hermaphrodite duct (fig. 19 a) stretches under the spermatheca and the bag of the penis and forms 

 a flattened coil, quite covered by the latter; this coil is composed of rather thinwalled windings, which, 

 when loosened from each other, had a length of about i5 c,n by a diameter generally of 1-5 — 2 mm ; fore- 

 most under the neck of the bag the duct was somewhat thinner, and divided in the usual way (fig. 19b) 

 into the short oviduct and the spermatic duct which is only thin near the beginning (fig. 19 c). The 

 spermatic duct was powerful, thickwalled, and stretched in a curved way with a length of 3 cm and 

 a diameter of 2 mm to the hinder end of the bag of the penis (fig. 19 d) continuing into the penis. The 

 bag of the penis (the praeputium) (figs 18, 19 dd) was large, 3 cm long by a breadth of 2-i cm and a 

 thickness of i'3 cnl ; it opened with a narrower neck foremost in the outer genital region (pi. I, fig- 2); 

 its walls were not thick, but tough; its inside was smooth, only in the neck were seen longitudinal 

 folds, of which a more strongly marked one was seen in the outer aperture (fig. 2). In the praeputium 

 was the whitish penis, quite bent double (figs. 19, 20); when straightened it measured 4 cm by a diameter 

 varying between 9 — i4 m,n ; its contour was round or a little compressed, only the end of the organ 

 was more flat; on one side was found (quite as in the earlier examined Bathydoris) a rather narrow, 

 not superficial, rather long furrow without any discoverable aperture in the bottom; on the point was 



