164 6 



The plump bulbus pharyngeus had a length, height, and breadth of 3™™; 

 the end of the radula-sheath projected rather strongly behind at the lower side of this 

 pharyngeal bulb. The palatal hooks were yellowish, mostly somewhat bent, small staves 

 of a length of up to 009 mm . often somewhat swollen towards the point (fig. 2). The 

 mandible plates were yellow, the anterior end brown, of a breadth of up to Oô 11 ™, formed 

 of closely packed cylinders of a length of up to O^™ 111 (fig. 3i. The broad tongue with a 

 yellow, glistening radula tapering to the fore end. and containing 22 series of tooth- 

 plates; farther backwards in the sheath 12 series were found of which 3 were not fully 

 developed; thus the total number of series was 34. In the series up to 15 lateral plates 

 were found on either side of the median one. The plates were yellow: the breadth of 

 the median plates was (MS™" 1 ; the length of the five outermost lateral ones 0-06 — 008 

 —009— 0-13— 01 d™ 1 . The hook of the outermost plate but four ifig. 4) had a height of 

 O-OS™™. The median plates were of the common form with the legs wide apart; the hook 

 on the edges had (6—7) fine denticles, and at the base of these on either side 2 coarser 

 denticles. The lateral tooth-plates (fig. 5i to the outermost ones had a strong hook with 

 dentate margins, and at the base of the hook outward two larger and a few 7 smaller 

 denticles were found; at the base invard one denticle: the two outermost ones (fig. 6) 

 were quite without hook, the following had a small hook. 



The salivary glands were as usual, their tapering posterior end reached almost 

 to the pylorus-region of the masticatory stomach. 



The oesophagus was posteriorly dilated into an anterior stomach. The masti- 

 catory stomach had a diameter of S'ö™ 3 ; on its inside were seen in the usual way the 

 (about 12] clear, pyramidal masticatory plates, most of which, however, were rather small. 

 In the cardial part of the posterior stomach two series of plates were seen, very much 

 resembling the other, but very unequal as to size (fig. 7). The larger plates had a height 

 of up to at least O'S™™. — All the stomachs were filled with copious, feltlike contents, 

 consisting of different, most filiform algae. 



The yellowish white, almost cylindric liver had a length of S"™. 



The penis was cylindric, 4™° long, with a strong retractor at the posterior end 

 (fig. 8); the praeputium had a very strongly marked furrow on the inside; the glans, which 

 stretched through two thirds of the length of the cavity of the praeputium , was almost 

 cylindric and without any trace whatever of papilla? or hooks, neither were any such seen 

 on the crown of the praeputium. 



Aplysiella. P. Fischer. 



P. Fischer, descript. d'une espèce nouv. du genre Pliyllaplysia. Journ. de conchy]. 1S72. p. 295 — 296. 

 — , man. de conchyliologie. 1887. p. 567. 



