15 173 



meter of 1 — 2"™. On account of its rather copious contents tlie intestine was of a 

 blackish gray colour. These contents consisted of a large number of fine and very fine 

 particles of sand mingled with a vegetable substance. 



The yelllowish liver whose colour made a contrast to the windings of the inte- 

 stine, had a length of 12 mm , by a breadth of 6-5 mm , and a height of 7 mm ; it was almost 

 sausage-shaped (fig. 9dd), and by the windings of the intestine it was divided into a 

 number of longer or shorter lobes united with each other. Anteriorly and to the right 

 beside the intestine a little biliary cavity was found, which had several openings at the 

 top, opening close at the pylorus of the posterior stomach; beside this cavity a little, bent 

 diverticulum was found, closely attached to the liver (biliary bladder?). 



The pericardium (fig. lb) was large, of a short-oval form, of a length of 7"™, 

 by a breadth of 5 mm ; at the hinder edge to the left the pericardio- renal aperture was 

 found. At the right edge of the pericardium, and closely attached to it (fig. 1), the above 

 mentioned, curved, lengthy organ (osphradium?) was resting; it was black pigmented on 

 the outside, while on the lower side close-standing, round, whitish tubercles were seen of 

 a diameter of up to OSO 01111 , the nature of which was not to be more exactly determined. 

 On the lower side of the organ towards the outside a ganglion (osphradial?) was seen, 

 likewise of a diameter of OSO™ 11 . The ventricle of the heart (fig. 1 b) had a length of 

 2 mm ; at the arcus aortae (ant.) a little crista was found with folds on the inside. 



The yellowish white kidney (fig. t a) had a length of 8°™ with a curved left edge; 

 its anterior concavity encompassed the posterior and left half of the edge of the pericar- 

 dium, while the posterior concavity adjoined the gill. The structure was the common one ; 

 concrements were not found in any great number. 



The yellowish white hermaphrodite gland was situated at the hinder end of 

 the liver; it was irregularly globular, of a diameter of 3 - 5 mm , of the common structure; in 

 the round lobes ripe oogene cells and zoosperms were scarcely found. The thin, white 

 duct of the hermaphrodite gland (fig. 10 a) wound between the lobes of the liver to the 

 anterior genital mass and farther along the upper and inner edge of this mass. 

 This latter yellowish white mass (fig. 10 b) was somewhat compressed, of a length of 2 - 2 mm , 

 and below at the right side it showed the finer windings of the albuminous gland ; on its 

 upper side the small pyriform spermatocyst was found. This mucous-albuminiparous 

 gland continues in a cylindric tube of a length af 4 mm , which tube is divided into two 

 parts by a strong fold or partition-wall through its whole length. The tube, the sperm- 

 oviduct; ends in a large vulvar papilla (fig. 10 f), of which the upper part projects digitately, 

 split into two half parts of unequal size, while the nether part receives the duct of the 

 spermatotheca. This latter (fig. 10 e) appears before the ventricle of the heart resting on 

 the hinder end of the masticatory stomach, as a clear, colourless, globular bladder of a 



