LIMAX. 143 



tris the organ which corresponds to the penis of L. Jlavus becomes of a some- 

 what problematical character. In L. agrestis it is an elongated conical organ, 

 with a protuberant base. Its summit is divided into three coeca; the retractor 

 muscle is inserted into its side. Upon the interior it presents several longitu- 

 dinal folds of mucous membrane, and at its lower part, corresponding to the 

 protuberance of the base, an oval, pointed papilla. In L. campeslris, 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. campeslris it is always two-lobed, or double. The oviduct is a long, wide, 

 soft, white, tortuous, sacculated tube, passing from the ovary to the vagina. 

 The neck or portion immediately joining the vagina commences usually where 

 the prostate gland terminates, and is contracted to less than half the calibre of 

 the upper portion of the tube. Its interior surface exhibits a number of trans- 

 verse folds, corresponding to the contractions which produce the sacculated 

 appearance of the organ, and upon the inner side upon each side of the sper- 

 matic groove, or longitudinal fold. 



The generative bladder, in L. jlavus, is a large, pointed, oval receptacle 

 opening by a very short, wide tube or duct, into the vagina. In L. agrestis it is 

 large, elongated oval, and opens by a short duct into the angle formed by the 

 junction of the vagina with the male portion of the generative apparatus. In 

 L. campestris it is a small oval sac, with a longer, narrow duct, opening into 

 the tube leading from the penis to the cloaca. In all three species of Limax 

 the cloaca is a short canal opening at the generative orifice on the right side of 

 the head. 



The characters of the various organs in the other species are given below. 



Limax maximus. 

 Color light brown or ashen with alternate longitudinal rows of round spots, 

 and uninterrupted stripes of black along the back and sides, replaced by irreg- 

 ular blotches on the mantle ; lighter on the sides, dirty white below ; eye- 

 peduncles and tentacles short, blackish. Body elongated, terminating in a 

 well-marked dorsal carina ; covered with coarse, elongated, longitudinal tuber- 

 cles ; constantly exuding mucus from its whole surface, giving a vermicular, 

 glistening effect. Mantle large, bluntly oval, with tuberosities more delicate 

 and arranged concentrically ; orifice of respiration very large at its hinder 

 lateral portion. Foot with a narrow locomotive disk. Length about 4 inches. 



Limax maximus, Lin. Syst. Nat. Sci. — Gould and Binney, Invert, of Mass. 



ed. 2, p. 408, Fig. 669 (1870). — Tryon, Am. Journ. Conch., III. 315, PI. 



XVI. p. 2 (1367). 

 Limax antiquorum, Ferussac, Podr., 20 ; Hist., 68, PI. 4, PI. 8, A, Fig. 1. 



A specimen of this common European slug was found in Newport, R. I., in 

 a garden, by Mr. Samuel Powel (1868). It is figured below. This species has 



