DISCODORIS BRANNERI MAC FARLAND 69 



posterior visceral mass. It describes a C shaped loop upon itself, 

 the pyloric end lying almost directly above the anterior portion. 

 The anterior half of the intestine is large and dilated, being about 

 1 1.0 mm. long by 2.0 mm. in diameter. It courses obliquely 

 upward and backward in a deep groove in the upper right side 

 of the visceral mass, constricts suddenly to 0.5 mm. in diameter, 

 and continues for about n.o mm. to the anal opening, situated 

 at the summit of the anal papilla, in the center of the branchial 

 circle. 



Liver. The liver is of the usual Dorid form, bluntly conical, 

 the apex lying posteriorly beneath the branchiae, the anterior end 

 divided by a deep median groove into right and left lobes, between 

 which the stomach is inclosed. The total length of the liver is 

 12.0 mm., its maximum diameter 6.5 mm. The dorsal surface of 

 the organ is divided by two transverse sulci into three nearly 

 equal lobules, their surface being diversified by an irregular 

 system of complicated ridges and shallow grooves. 



REPRODUCTIVE SYSTEM. 



Hermaphroditic gland and duct. The hermaphroditic gland 

 is relatively inconspicuous and thin, the specimen evidently not 

 having been taken during its breeding season. It can be dis- 

 tinguished with difficulty from the upper surface of the liver 

 which it closely covers. From the anterior border of its right 

 lobe it gives rise to the long, narrow, whitish hermaphroditic duct 

 (PI. XII, fig. 65, h. d.) which courses forward and downward for 

 a distance of ca. 3.5 mm., dilating into the long white hermaphro- 

 ditic ampulla (PI. XII, fig. 65, h. amp.). This latter organ is of 

 considerable size, making up a large portion of the anterior 

 genital mass. It is 10.0 mm. in length by i.o mm. in diameter, 

 and is coiled in three to four close loops upon the posterior and 

 outer face of the anterior genital mass. At its anterior end it 

 divides at once into the spermatic duct (PI. XII, fig. 65, sp. rf.) and 

 the oviduct (PI. XII, fig. 65, ov. d.). The former is very short, 

 passing almost at once into the apex of the heart-shaped pinkish 

 prostate gland (PI. XII, fig. 65, pr. g.), which occupies the poste- 

 rior inner face of the anterior genital mass. From a deep median 

 groove in its posterior face arises the slender vas deferens (PI. 

 XII, fig. 65, v. d.}. The total length of the prostate gland is 4.0 



