472 ABIONIDJE. 



tooth is rather sharper. The outermost laterals are oblong at the 

 base, with one long blunt tooth and one or two small teeth dis- 

 united and separate from it, but rising from the same base. These 

 outer teeth are very characteristic of the genus, for nothing like 

 them is to be found in either Avion or Limax. The teeth of this 

 species do not certainly agree with the radula described and figured 

 by Heynemann ; there is a similarity only so far as the straight 

 form of the central teeth ; but he distinctly says all the laterals 



Fig. 149. Anadenus altivagus. 

 (Copied from Land and Fresh w. Moll. India.) 



are straight and with no basal cusp, and he thus figures the 55th 

 of giyanteus ; and the 40th tooth of A. schlagintweiti has this small 

 basal tooth, but he adds that on the extreme laterals it disappears. 

 There were 106 rows in a very complete radula I got out arranged 

 thus : 55 . 1 . 55. 



" The jaw and radula are found to be like that of Geomalacus, 

 to which genus Anadenus has, in this respect, some affinity. 



" Generative organs. The ovotestis is bilobed, and situate quite 

 within the folds of the liver-lobe, and is of a pale green tint ; the 

 hermaphrodite-duct is rather long, a good deal convoluted near its 

 lower end, but is straight for a short distance before it joins the 

 albumen-gland ; this organ is very large, and lies on the left 

 anterior side of the animal. The oviduct is of the usual form. 

 The vas deferens is given off just above the duct of the spermatheca ; 

 it is very long, and is coiled on itself at one point, about the middle 

 of its length ; this coil lies well forward on the left anterior side 

 behind the left tentacle, and doubles back on itself, and passing up 

 the side of the male organ enters it at the hard rounded posterior 

 end, close to where the retractor muscle is given off. The attach- 

 ment of this muscle is at the posterior margin of the mantle-cavity ; 

 it is so much contracted in the spirit-specimen as to bring the 

 posterior end of the penis close up to it and the attachments of the 

 eye-tentacles, etc. The spermatheca is about the same length as 

 the penis, pear-shaped. 



