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Jaw and Lingual Dentition of Pulmonata. 180 
Jaw already described. 
Lingual membrane long and narrow (pl. 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 figures give the central with the first, fourth, 
twelfth, thirteenth, seventeenth and twenty-sixth teeth, the last two being 
marginals. 
Genitalia (pl. xvii, fig. 9) without the accessory duct of the genital 
bladder, and with a dart sac (?). They resemble nearly those of HZ. ruji- 
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. Stearnsiana, but without their ter- 
minal complications. I have not figured them, being uncertain whether 
they should be considered as a part of the genital system. 
Helix Tryoni, Newce. (HLuparypha). 
Sta. Barbara Island, California. Mr. H. Hemphill. 
Jaw already described by me (L. & Fr. W. Shells, I. 179). 
Lingual membrane (pl. 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 (pl. xvii, fig. 10) as usual in Artonta, especially in H. Stearns- 
tana, 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 pl. 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. 
