86 OPISTHOBRANCHIATA OF BRAZIL 



dental formula for the whole radula may be expressed as 

 60 :o 160x49. 



Visceral complex. The salivary glands are short and broad, 

 2.5 mm. in length, scarcely extending beyond the circumesopha- 

 geal ring of the central nervous system. The esophagus is short 

 and wide, passing downward and backward into the large stomach, 

 which lies in the usual V shaped groove in the upper anterior 

 border of the liver. The stomach is broadly wedge shaped above, 

 4.5 mm. in length, 3.0 mm. wide and 2.25 mm. in depth, pre- 

 senting a somewhat triangular cross section. The esophagus 

 enters at its lower anterior border, the intestine arising from the 

 upper posterior end and passing backward to the anus, lying in a 

 groove in the upper surface of the liver throughout its course. 

 The latter organ presents the form of a blunt cone, the anterior 

 end deeply notched for the reception of the stomach, and facetted 

 by the pressure of the anterior genital complex. The cavity of 

 the liver opens widely into that of the stomach on the ventral 

 median line, immediately behind the opening of the esophagus. 

 No bile cyst is present. 



REPRODUCTIVE SYSTEM. 



Hermaphroditic gland and duct. The surface of the liver 

 is covered everywhere save on the central portion of the gastric 

 groove, the anterior face and the antero-ventral surface by the 

 ramifications of the hermaphroditic gland. Its duct arises by 

 the union of a number of delicate tubules from the lobules of 

 the mid-dorsal face, immediately behind the stomach. It courses 

 forward and downward, between the right surface of the stomach 

 and the anterior lobe of the liver, for a distance of 3.5 mm. and 

 dilates into the white hermaphroditic ampulla on the lower 

 surface of the anterior genital mass (PI. XV, fig. 82, h. a.}. 



Anterior genital complex. The organs of this complex are 

 very compact, convex upon the outer and inner surfaces, in 

 lateral view oval, from above more pointed posteriorly than in 

 front. The extreme length of the complex is 4.6 mm., its width 

 2.5 mm., and height 3.5 mm. Its inner face bears a shallow 

 broad groove, deepening toward the upper margin. Anterior 

 to this groove and forming a large part of its anterior wall is 

 a smooth, light brown surface, the wall of the spermatotheca (PI. 



