THE CARNIVOROUS SLUGS OF SOUTH AFRICA. 195 



Length . . . . 



Breadth in middle . 



Breadth at respiratory opening 



Breadth of foot-sole . 



Greatest height ... 



Distance from respiratory open- 

 ing to hind end . . . 13 „ . ]3'5 ,, 



Internal Characters. — Skin very thick. Shell 4 x 2*5 

 mm., usually thick, depressed, with the apex in front of the 

 posterior margin ; sinus deep. 



Pedal gland. — Slender; glandular tissue gradually dying- 

 out some distance in front of the terminal vesicle; duct closely 

 convoluted posteriorly ; fold in terminal vesicle divided into 

 narrow lamellge. 



Nervous system. — Cerebral ganglia closely united; 

 buccal ganglia large, close together, situated posteriorly, and 

 joined to the cerebral ganglia by extremely long connectives ; 

 cerebro-pedal and cerebro-pleural connectives also long; 

 nerves corresponding to those of buccal retractors in other 

 species uniting with anterior end of sheath of odontophore, 

 and joined to cerebro-buccal connectives for most of their 

 length ; nerves to pedal gland very slender. 



Digestive System (PI. XVII, figs. 91, 92; PI. XX,fig.l25; 

 text-fig. 3, A, p. 159 ; PI. XXI, fig. 129).— Radula exceedingly 

 large, sometimes attaining a length of 21 mm.; central tooth 

 typically present; others not differentiated into laterals and 

 marginals, very large excepting near the edges and the 

 centre ; cusps in typical form simple, slightly curved ; bases 

 very narrow ; apophyses typically not prominent. Formula of 

 type : (27 + 1 + 27) X 52, of a Zululand example : (37 -f 1 

 -h 38) X 60. Odontophore also extremely large ; posterior 

 end joined to the fioor and sides of the body-cavity towards 

 its hind end by numerous radial buccal retractors ; odonto- 

 phoral support rounded in front. CEsophagus short and 

 broad, merging into a broadly fusiform crop. Anterior loop 

 of wide intestine not much deeper than posterior loop; 

 intestine continued posteriorly on right side of liver. Salivary 



