440 



A MANUAL OF AMERICAN LAND SHELLS. 



a. It is quite thick aud ponderous; its general color is deep brown- 

 ish, variegated with undulating intervals of white on the spire and 

 oLheis more obscure on the columellar side of the body-whorl. On the 

 side opposite to the aperture the brown color is relieved only by three 

 indistinct and ill-defined dark bands, and by the black line showing 

 the margin of a former j)eristome. The columella is considerably 

 thickened and folded, the columellar margin is covered by a black cal- 

 lus, and the peristome is broadly margined internally with black; fur- 

 ther in,' the aperture is i^urely white." 



Mr. Say no doubt referred to 0. undatus under the name of Achathia 

 Jianwiigera, Fer. (ed. Binney, p. 29). He mentions also the manuscript 

 name of reses, which he had intended to give to a shell found on trees 

 at the southern extremity of East Florida, but which he afterwards 

 found to be Buiimns undatus, Brug. 



Eafinesque's description of Agatina fuscata will be found on p. 50 of 

 Terr. Moll., I, and in Binney and Tryon's edition. The locality (Louisi- 

 ana) is doubtful. 

 The specimen figured (Fig. 483) was collected at Key Biscayne, Flori- 

 FiG.483. tla. It is also found at Key ri(;.484. 



West. Formerly I was inclined 



to refer it to 0. zebra, and con- 

 sidered it as identical with 



specimens from the Sierra 



Madre, Mexico, which Messrs. 



Fischer and Crosse consider 0. 



melanochilus, Val. (1 figure one 



of this species in Fig. 484), but 



am now persuaded that it is 



simply a variety 0. undatus. 

 o. undatus, Via- Its genitalia agrees with those o. meianochnus. 

 of 0. undatus, as well as its jaw and lingual dentition (see ante, pp. 437, 

 438). 



For jaw and lingual dentition see above, pp. 436, 437, and Plate X, 

 Fig. H, Terr. Moll., V. 



It will be interesting, in connection with my comparison of Orthalicus 

 aud Liguus, to state that, having had an opportunity of dissecting six 

 specimens of this species from Jamaica, I found the genitalia constantly 

 agreeing with Lehmann's figure in Malak. Blatt., 1864, Plate I, Fig. 4. 

 Tlierc is no multifid vesicle on the penis, as in the species of Orthalicns 

 fignred by Fischer and Crosse (Moll, Mex.). With this exception the 



