92 Marine Investigations in South Africa. Vol. V. 



continued in a prominent black, even, connecting process. This 

 anterior part is separated by a deep furrow from the posterior, that 

 also through a longitudinal cleft and border is divided into two lips, 

 a higher inferior and a lower and thicker superior, that is continued 

 in the anterior part. The inferior edge of the mandible is quite even 

 (figs. 9, 10). Above, the jaws are connected with a thick nearly black 

 cuticle, consisting of longitudinal halves corresponding to the jaws. 

 Below at the entrance into the mouth is a little yellow (black 

 in front) lamina (fig. 11), 3 mm. broad, 2 long, with a crest in front 

 (fig. 14) on the upper side. The thickness of the M. transversus 

 vianclihularum here 3-5 mm. Behind the M. transv. pass in two 

 cartilaginous-looking strong plates (figs. 15, 16) of cellular structure 

 with large clear round cells. — The narrow mouth cavity is filled by 

 the short and keel-shaped tongue with broad reddish brown rasp. 

 This last contained about 18 series of plates, in the sheath, more- 

 over, at least 24 rows, the total number being thus probably 42. 

 The rows seemed to contain about 50 lateral plates. The plates 

 were all yellow at the basal part, otherwise nearly colourless ; the 

 length of the lateral plates rising to about 0"4 mm. The median 

 plates narrow, with a weak pointed hook (fig. 17). The lateral plates 

 quite as in other Janidse,* rather narrow and slender, the hook a 

 little bent (figs. 18, 19). The whitish salivary glands reaching 

 backwards to the liver. 



The oesophagus (fig. 20a) 10 mm. long, by a diameter of 2, with 

 fine longitudinal folds. The presence of a stomach before the liver 

 could not be determined. The large posterior intestinal mass, chiefly 

 formed by the brown liver, somewhat flattened in front, rounded 

 behind, 2 cm. long by a breadth of 1-3 and a height of I'l (fig. 20) ; 

 distinct branches were not seen. In the liver anteriorly a roundish 

 cavity (fig. 20). From this last issues the white intestine; for a short 

 distance it perforates the liver, and appears on its under side running 

 submedian backwards (fig. 20), then making a bend, and, further on, 

 running in a furrow of the liver, lies first to the left, then obliquely 

 crossing the liver going backwards on the 7-ight side, turning upwards 

 (fig. 8) and ending in the anal papilla (figs. 8a., 20) ; the total length 

 of the intestine about 5 cm. by a breadth of 3-4-5 mm. — The contents 

 of the cavity of the liver and of the intestine white, consisting of 

 hard masses of calcareous Bryozoa. 



A ramification of the brownish black liver could not be ascertained 

 or followed. The epinotidia (fig. 6) on the margin of the back were 



* The number of series of plates was in Jan. hyalinus 16 (8 -j- 8), in 

 J. australis 24 (16 -|- 8), the number of lateral plates in the rows in the former 

 12-13, in the latter up to 54. 



