certain Agnathous Pulmonate Mollusks. 67 
Tryon *, relate to the shell of the animal only, no description 
having yet been given of the animal. A figure of the radula 
has been published +, and Suter ¢ has given a figure of the 
animal with the shell attache1, but the drawing leaves much 
to be desired. 
Anatomy. 
The Alimentary Canal.—The buccal mass is large, 
measuring 18°5 millim. in length in the alcoholic specimens 
examined. The muscular attachments, as in the allied genus 
Paryphanta, are very strong. ‘The buccal retractors are 
inserted posteriorly and ventro-laterally, laterally there are a 
series of muscles which have their origin on the floor of the 
body-cavity (Pl. I. fig. 10, 7.m.). Posteriorly the buccal 
mass has the appearance of having a muscular cap (Pl. I. 
figs. 10, 11), but on dissection this is found to be due to the 
upward curving of the terminal portions of the muscular 
sheath of the radula. The radula is curved downwards in 
the extreme anterior region and laterally embraces the mus- 
cular sheath; looked at from the opening of the mouth it 
has the appearance shown in figure 7 (PI. I.). 
The esophagus enters the dorsal surface of the buccal cavity 
about 4°5 millim. from the anterior end; it is a thin narrow 
tube, enlarging to a wider cavity behind the salivary glands §. 
These latter are two large glands situated on the posterior 
portion of the buccal mass (PI. I. fig. 10, s.9/.); they are 
fused together in the median line. From the anterior end of 
each a long fine salivary duct is given off, and these enter the 
buccal cavity slightly below and behind the opening of the 
cesophagus (PI. I. fig. 10). 
The Pedal Gland (Pl. I. figs. 12, 13).—Lying on the 
floor of the body-cavity is a small flattened structure—the 
pedal gland. The actual gland measured 13 millim. in length ; 
at its posterior end it makes a bend to the right side and then 
again towards the left, thus being formed by what may be 
described as three limbs; the third limb is partly covered by 
a series of strands of pedal muscles. The retractor muscle is 
attached ventrally and arises from the floor on the right side. 
Attached to the underside of the third limb and lying deeply 
* Man. Conch. 1885 (ser. 2) vol. i. p. 126, pl. xxiv. fig. 74, 
+ Trans. N. Zeal. Inst. vol. xvi. p. 167, pl. x. fig. P. 
t Journ. of Malac. 1899, vol. vii. pl. ili. fig. 1. 
§ Owing to part of the animal having been left in the shell, which I 
did not receive, I have been unable to describe the remainder of the 
digestive system. 
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