14 AMEKICAN JOURNAL 



The buccal mass is controlled by well marked muscles. A 

 broad muscular ribbon is attached to the posterior concavity of 

 the adductor, a little on the right. About midway in the cavity 

 of the viscera it divides into two parts, one of which is fixed on 

 each side of the superior surface of the buccal mass. A similar 

 but more slender muscle is similarly attached below. Three 

 stout bundles of muscular fibre are attached anteriorly on each 

 side to the front of the foot, and posteriorly to the sides of the 

 buccal mass, which they serve to extend outwards, while the long 

 muscles serve for retracting it. 



A short stout muscle binds the buccal body to the foot, behind 

 and somewhat below the protractors, on each side. 



A long and very slender fibre connects the posterior end of 

 the penis with the spermatic canal behind the prostate. 



The protractor muscles of the penis are short and thin, blended 

 somewhat with the fascia of the preputium. The muscles of the 

 female organs will be hereafter described. 



Nervous System. This, in the alcoholic specimens, could not 

 be thoroughly traced out. The nervous collar around the oeso- 

 phagus at the posterior end of the buccal body consisted of two 

 superior ganglia connected with two inferior ganglia and with 

 each other, by nerve fibres. Above, these appeared somewhat 

 reticulated ; below they diverged without inosculation. A rather 

 stout nervous cord extended back from the lower ganglion on 

 the right, parallel with the spermatic cord, and provided with 

 an accessory ganglion near the prostatic gland. The nerve 

 fibres, as well as the blood vessels which supply the foot, enter 

 it at or near the buccal mass, on the median line. 



Circulatory and Respiratory Systems. Philippi (in his descrip- 

 tion of the soft parts of Pileopsis G-arnotii, Payr,) says that a 

 crumpled organ hangs from the lining of the pulmonary cham- 

 ber, which is " evidently the gill." He admits that he had only 

 a single specimen, in which several of the organs were indeter- 

 minable. His figure is extremely indefinite, and is further com- 

 plicated by the outline of the head, which is represented, on a 

 small scale, as seen from below, while the remainder of the same 

 figure represents the back, on a large scale, as seen from above ! 

 His representation of the "gill" is unlike anything in the 

 species now under consideration, though his "gill " occupies the 

 place of the renal organ of the latter. His account must there- 

 fore be regarded as erroneous, the error doubtless being due to 

 the small amount of his material. 



The present specits is a true Pulmonate. The pulmonary 

 chamber extends over more than half the body, reaching the 

 adductor muscle on the left side behind, and thence forward 



