192 GLYPTOSTOMA. 



are independently inserted on the vagina. Darts unknown. (PI. 60, 

 fig. 8, L. ghiesbreghti). 



The three species present the same type of genitalia. The shell 

 is similar to Campylcea or JEpiphragmophora, but the doubling of 

 the dart sack, and the number of the mucus glands, independently 

 inserted on vagina, are features which can only be compared to the 

 Xerophiloid and Fruticicoloid groups. The serrate keel of the tail 

 is a curious feature of this group, but something like it occurs also 

 in O.iychona trigonostoma, the internal anatomy of which is un- 

 known. The jaw and teeth of Lysinoe are of the normal Helix 

 form. Distribution, Southern Texas (humboldtiana*) to Guatemala 

 and Honduras (ghiesbreghti*). 



The name Aglaja Alb. is thrice preoccupied in zoology. Lysinoe 

 was proposed for two species, the second of which, Helix hogoleu- 

 ensis Le Guill., belongs to the prior genus Rhyssota Alb. We there- 

 fore follow von Martens' excellent precedent in considering H. ghies- 

 breghti the type of Lysinoe. Helix humboldtiana agrees entirely 

 with ghiesbreghti in anatomy, so the sectional name, Humboldtiana 

 v. Iher., becomes a synonym. Odontura is preoccupied. 



L. ghiesbreghti Nyst., iv, 75. L. humboldtiana Fer., iv, 260. 



/. subaurantia, v. Mart. v. hegewischi v. Mart. 



/. strubelli Bttg. v. hogeana v. Mart. 



/. fulvostraminea, v. Mart. v. buffoniana Pfr. 



/. bizona, v. Mart. matronula Uhde. 



/. rufozonata v. Mart. v. badiocincta Wiegm. 

 L. eximia Pfr., iv, 75. 



v. stolli, v. Mart. 



Genus GLYPTOSTOMA Bland & Binney, 1873. 



Glyptostoma BLD. & W. G. B., Proc. Acad. Nat. Sci., Phila., 1873, 

 p. 244 (June 3, 1873). See for anatomy, BINNEY, t. c. pi. 1, f. 1,3; 

 Am. Journ. Conch., vii, p. 190, pi. 17, f. 3, 4; Proc. Acad., Phila., 

 1875, p. 219, pi. 16, f. 4, pi. 13, f. 6, and 1876, p. 190, pi. 6, f. H. ; 

 Terr. Moll, v, p. 373, pi. 14, f. D. 



Shall discoidal with slightly convex spire of about 6 whorls and 

 broadly open umbilicus showing all the whorls; smoothish, dark 

 and opaque ; last whorl rather tubular, hardly descending in front. 

 Aperture round-lunar, oblique, the lip simple and acute, neither 



