242 TERRESTRIAL AIR-BREATHING MOLI,USKS. 



Jaw arcuate, narrow, ends rounded, anterior surface with 24 ribs, crenulat- 

 ing the concave margin. (Fig. 140.) 



Lingual membrane: see pp. 240, 241. (PI. V. Fig. P.) 

 Has been found at a single locality, namely, at Charlotte Harbor on the west 

 coast of Florida. 1 



The above description is obviously very imperfect, inasmuch as it is drawn 

 from a dead and greatly contracted specimen, and as no notes of the animal 

 have been found excepting as to its locality. The characters, however, are 

 sufficiently marked to distinguish the species. From its slight reticulation, in 

 its contracted state, it must have been quite smooth when extended. Its colors 

 are similar to those of Tcbennophorus Caroliniensis, and similarly distributed. 

 The tentacles are not very conspicuously spurred, but the puncture for the 

 protrusion of a spur is manifest. 



The genitalia are figured by Leidy (1. c.) A remarkable peculiarity of this 

 genus is the removal of the male and female portions of the sexual apparatus 

 from each other. The former, except the testicle and prostate gland, occupies 

 the usual position, but opens externally between the mouth and olfactory ori- 

 fice ; the latter is placed in the middle inferior part of the visceral cavity, and 

 opens exteriorly on the right side, inferiorly just posterior to the middle of 

 the body. 



The testicle is situated between the posterior part of the stomach and the 

 liver, on the right side. It is not tabulated, but has the same aciniform ar- 

 rangement as in other limaciform genera. The epididymis is moderately tor- 

 tuous, and becomes the vas deferens at the junction of the ovary with the 

 oviduct. The vas deferens takes a remarkable course to get to the penis. It 

 is at first attached for a short distance to the commencement of the oviduct, 

 which it leaves, and then winds around its lower extremity, where it is joined 

 by a comparatively very small prostatic gland. It continues its attachment to 

 the lower part of the oviduct to the junction of the latter with the duct of the 

 generative bladder, where it receives a small duct from the duct of the latter 

 organ, and then passes nearly to the external female orifice, where it turns 

 abruptly forwards between the muscular peritoneum and the right edge of the 

 podal disk, and continues this course to the head. It now turns abruptly back- 

 wards to the right, and again appears within the visceral cavity, and passes to 

 the base of the penis sac. 



The penis is a conico-cylindroid, contorted organ, contained within a thin, 

 muscular sheath. Its apex presents a small, round papilla, or glans; and into 

 its base is inserted the retractor muscle, which arises just anterior to the pul- 

 monary cavity. The lower part of the preputial sheath of the penis is joined 

 by the common duct of a highly developed, multifid vesicle. This latter organ 

 consists of twenty-five long, narrow, cylindrical, blind tubes, contorted at their 

 termination, and opening separately into a common tube, containing, in the 



1 Stearns refers it also to Nicaragua, I but doubt its being so widely distributed. 



