26 Transactions of the South African Philosophical Society. 



outside and inside less pronounced than in the specimens from other 

 localities, and even on the inside scarcely visible ; still, one or two of 

 the three plates showed in two individuals three holes. The third 

 stomach 10-11 mm. long by a diameter of 4-5, with very thin walls 

 with fine folds. The intestine as usual, about 10 cm. long by a 

 diameter of 2-4 mm. — The contents of the stomachs (sometimes, 

 too, of the bulbus pharyngeus) chiefly very fine sand-particles, thin 

 pieces of algae, fragments of small bivalves, some Polythalmia. 



The liver dirty brown, 2-2*5 cm. long by a breadth of 1*2-1*4 and 

 a height of 1 cm. 



The white kidney 13 mm. long by a breadth of 3-4. 



The yellow hermaphrodite gland covering the hinder end and 

 a small part of the upper side of the liver with a layer about 4 mm. 

 thick ; the ampulla of its duct forming a coil of white windings. 

 The anterior genital mass seemed to be essentially quite as before 

 (Z.c, p. 283) described, 12-14 mm. long. The grayish brown 

 spermatotheca globular, of a diameter of 6 mm. ; the strong 

 yellowish duct 8 mm. long ; the spermatocyst whitish, sack-formed, 

 2 mm. long. The seminal furrow terminating in the male aperture 

 near the right side of the mouth. Into it also opens the penis , 

 which is pear-formed, 4*5-5 mm. long; on the base of the organ is 

 fixed a strong retractor, and into its cavity opens the large prostata, a 

 small globular gland, and a small cylindrical sack of the length of 

 2 mm. (fig. 9c). The large coil of the prostata, 8-11 mm. long by a 

 breadth of 8-9, lying under and behind the bulbus pharyngeus ; 

 when disentangled the length of the organ was about 20-25 cm.; 

 the tube was yellowish, its last windings white. The small, mostly 

 globular, glandular sack (fig. 9e) yellowish, 2-2*5 mm. long, its duct 

 mostly 2-3 times as long ; the sack was always intimately fixed to 

 one of the windings of the prostata (fig. 9a). From the base of 

 (fig. 9d) the penis sack (praeputium) projects the glans, nearly as 

 long as the sack, mostly very pronounced hammer-shaped (fig. 9e), 

 along the stalk a distinctly visible furrow, issuing from the opening 

 of the (fig. 10a) prostata and continued especially along one of the 

 legs of the hammer ; in one of the individuals the end of the 

 hammer projected from the genital opening (fig. 9). 



In spite of some differences, this form seems to belong to the 

 typical Ph. ayerta. According to Hanley * the original specimen of 

 Linnaeus was from the Cape, and there seems to be every reason for 

 returning to the old specific name. 



* Hanley, ipsa TAnncp.i conchy lia, 1855, pp. 203-204. 



