142 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



cies I have also found to agree with the figures of the external animal and 

 genitalia given in the " Terrestrial MoUusks," as well as with Mocjuin-Tandon's 

 (Moll. Terr, et Fluv. de la France) figure of the genitalia, and Heynemann's 

 and Lehmann's figure of the dentition : also with the fijjure of the genitalia 

 given by Schmidt and Lehmann. 



The Limax campestrk examined was collected in the country near Burling- 

 ton, N. J., by my friend, A. Ten Eyck Lansing. It agrees with the de- 

 scription and figures in the " Terrestrial Mollusks," not only as to its exter- 

 nal characters, but in its genitalia. I will here mention that its dentition does 

 not agree with that of L. Weinlandi, Ileynemann (1. c. p. 212), supposed by 

 that author to be the same species. 



The Limax Hewstoni examined is a typical specimen, given by Dr. J. G. 

 Cooper to the State Collection of California. It was labelled by him. There 

 can be no doubt, therefore, of its identity. 



The Limax montanus examined was one of the original lot found by Mr. In- 

 gersoll, and furnished by him. 



The Limax occidentalis was received from Dr. Cooper. 



This completes the list of North American Limaces now known. I will add 

 that maximus and Jlavus are put by Ileynemann in the s. g. Heynemannia ; 

 agrestis in s. g. Agriolimax ; campestris would be placed by him in s. g. Malaco- 

 limax; while Hewstoni would be placed by him in the genus Amalia. 



The testicle in the genus is a round or oval body, partially concealed by the 

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

 rounded acini. In L. Jlavus it is lobulated. The epididymis 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 ex- 

 tremity, with the vas deferens. Opening into the termination of the epididy- 

 mis, and lying against the inner side of the ovary, is a small, compound, fol- 

 licular 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. 



Tlie vas deferens is a comparatively short tube, passing 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 L. campes- 



