180 Jaw and Lingual Dentition of Pulmonata. 



Jaw already described. 



Lingual membrane long and narrow (pi. xvii, fig. 13). Teeth 26 - 1 - 26, 

 as usual in Arionta. The fourth has decided side cusp and cutting point, 

 which on the central and first three laterals are replaced by a prominent 

 bulging of the large cutting point. The thirteenth tooth has its inner 

 cutting point bifid. My figui'es give the central with the first, fourth, 

 twelfth, thirteenth, seventeenth and twenty-sixth teeth, the last two being 

 marginals. 



Genitalia (pi. xvii, fig. 9) without the accessory cluct of the genital 

 bladder, and with a dart sac (?). They resemble nearly those of H. rufi- 

 cincta (see above), differing chiefly in the length of the duct of the genital 

 bladder. At the base of the dart sac there appear two simple, thread-like 

 organs, reminding me of those of H. Steamsiana, but without their tei'- 

 minal complications. I have not figured them, being uncertain whether 

 they should be considered as a part of the genital system. 



Helix Tryoni, Newc. {Euparyphd). 

 Sta. Barbara Island, California. Mr. H. Hemphill. 



Jaw already described by me (L. & Fr. W. Shells, I. 170). 



Lingual membrane (pi. xvii, fig. 5) long and narrow, quite as in 

 Arionta. Teeth 42-1-42. The eleventh lateral has a decided side cusp 

 and cutting point. The 14th has its inner cutting point bifid. The char- 

 acters of the- individual teeth are shown in the figure, which gives the 

 central, the first, eleventh, fourteenth, thirty-seventh and forty-second 

 teeth. 



Genitalia (pi. xvii, fig. 10) as usual in Arionta, especially in H. Steams- 

 iana, but with this important difference, that from the base of the dart 

 sac one thread-like organ alone proceeds, the other being replaced by a 

 sponge-like process, evidently a form of vaginal prostate. 



Anadenus ? 



Himalaya Mts. Museum of Comparative Zoology, Cam- 

 bridge, through Mr. Anthony. 



On pi. xviii, fig. 1, I have figured the dentition of this slug, whose 

 specific name is unknown to me. There are 58-1-58 teeth. 



The jaw is thick, low, wide, slightly arcuate ; ends but little attenuated : 

 anterior surface with 14 stout, unequal, separated ribs, denticulating 

 either margin. 



The dentition is of the same type as described in the genus by Heyne- 

 mann, Malak. Blatt. X, 1863, p. 138. 



