80 PROCEEDINGS OF THE ACADEMY OF [1880. 



yellowi'gh, of a length of about 0.045 mm., with a median furrow 

 along the upper side and with thickened margins. The large laterals 

 horn-yellow in color, reaching the height of about 0.1 mm. (PI. IX, 

 fig. lib; PL X, fig. 2aa), hook-shaped, with a strong, roimded prom- 

 inence at the inside of the root of the hook (fig. 17). On each side 

 (PI. X, fig. 2b, c) of the two large plates (in two individuals) con- 

 stantly fifteen smaller, nearly colorless plates of a length of about 

 0.06 mm. These plates were all somewhat depressed ; the five inner 

 ones smaller, somewhat compressed ( fig. 2, 3a, 15 ) ; the others (fig. 2, 3) 

 broader, with the upper edge broad and irregularly toothed ; the outer- 

 most (fig. 2c) a little smaller than the adjoining plates. The bases in 

 each of the^e (fifteen) plates large, forming nearly half, or at least 

 making more than a third of the size of the whole plate.' The crop 

 of the bulbus of the usual form, as large or a little larger than the bulbus 

 itself; with a very short stalk with strong longitudinal musculature, 

 its aperture opening immediately behind the lip-disk. 



The salivary glands large, white, very elongate, in their foremost 

 part broader, and with several coils filling the space left between the 

 crop, the bulbus and the cesophagus. 



The oesophagus long. The stomach small, enclosed in the liver ; 

 the intestine rather short, forming its knee behind the fore-end of the 

 liver. The large posterior visceral mass about 9.0 mm. long by a 

 breadth of 4.3 and a height of 3.5 mm. ; the posterior end somewhat 

 pointed, though rounded ; the fore-end broader, perpendicular, somewhat 

 flattened on the right side ; the color of the surface (hermaphroditic 

 gland) ash-gray, the interior (the liver) brown or black brown, or 

 quite yellow. 



The heart as usual. The sanguineous gland irregularly reniform, 

 situated somewhat more towards the left side, rather thick, whitish, 

 covering the central nervous system and a large part of the bulbus 

 pharyngeus from above. The renal syrinx as usual. 



The hermaphroditic gland without developed sexual elements. The 

 anterior genital mass proper rather small, compressed, of about 2.5 mm. 

 largest diameter, but the loop of the spermatoduct (and the penis) 

 nearly as large as the rest of the mass. The spermatoduct long, 

 in its first part white, rather strong ; nearly as long as the second in 

 which it passes through a stricture ; this last part is thicker, cylindrical, 

 elongated, about 5.0 n;m. long, passing without exact limits into the 



' In both individuals the three to five foremost rows were without the 

 smaller plates, and the following two or three very incomplete in this respect. 



