i 



236 A MANUAL OF AMERICAN LAND SHELLS. 



This completes the list of i^orth American Limaces now known. I 

 will add that maximus and Jiavus are put by Heynemann in the sub- 

 genus Mey7iemannia ; agrestis in subgenus AgrioUtnax ; campestris would 

 be placed by him in subgenus Malacolimax ; while Hewstoni would be 

 placed by him in the genus Amalia. 



The testicle in the genus is a round or oval body, partiallj' concealed 

 by the liver; it is brown in color, and has the appearance of being 

 composed of rounded acini. In Lj. Jlavus it is lobulated. The epididy- 

 mis is an undulated or moderately tortuous tube, leading from the testicle 

 to the inner side of the junction of the ovary with the prostate gland. 

 It opens into a groove upon the inner side of the interior of the oviduct, 

 which is continuous at its inferior extremity with the vas deferens. 

 Opening into the termination of the epididymis, and lying against the 

 inner side of the ovary, is a small, compound, follicular body, which 

 appears to be common to all the terrestrial Gasteropoda. The prostate 

 gland is a white or cream-colored body, occupying the inner side of the 

 whole length of the oviduct. It has a transverse, striated appearance, 

 and numerous openings into the groove leading from the epididymis to 

 the vas deferens. The vas deferens is a comparatively short tube, pass- 

 ing from the prostate gland to the penis. In L. Jlavus, montanus, 

 Hewstoni, and maximus it joins the summit of the latter; in L. agrestis 

 and L. campestris it enters near the base. The penis in L. Jlavus is a 

 long, cylindroid, irregular body, lying at the right anterior part of the ; 

 visceral cavity, and joining at its termination a short cloaca. Into its 

 summit is inserted the retractor muscle, which has its origin from the 

 muscular investment of the visceral cavity, just posterior to the posi- 

 tion of the pulmonary cavity. The interior of the penis is lined by 

 mucous membrane, its exterior of muscular membrane. In L. agrestis ' 

 and li. campestris the organ which corresponds to the penis of L. Jlavus ■ 

 becomes of a somewhat problematical character. In L. agrestis it is an 

 elongated conical organ, with a protuberant base. Its summit is di- 

 vided into three coeca ; the retractor muscle is inserted into its side. 

 Upon the interior it presents several longitudinal folds of mucous mem- 

 brane, and at its lower part, corresponding to the protuberance of the 

 base, an oval, pointed papilla. In L. campestris the organ is spiral, 

 and has but a single, pointed summit. The ovary is a large, white, 

 semi-elliptic organ, usually more or less curved and lobulated, and 

 situated at the summit of the oviduct. In L. agrestis and L. campestris 

 it is always two-lobed, or double. The oviduct is a long, wide, soft, 



