CONCHqi-OGICAL WRITINGS. 65 



71. PMlomycus fuscus. Entirely brown, tentacula thick, back 

 smooth, tail compressed, acute. — In Ohio, on Amanita elliptica ; 

 length one fourth of an inch. 



12. PMlomycus Jiexuolaris. Fulvous, back variegated with 

 flexuose brown lines, slightly wrinkled transversally ; attenuated 

 behind, tail obtuse. — Length from one to two inches, it may change 

 its shape. Found on the Catskill mountains. There are many other 

 species of this genus in the United States. 



XVII. N. Gr. EuMELus. Differs from Limax by no visible 

 mantle, the four tentacula almost in one row in front and cylindrical, 

 nearly equal, the smallest pair between the larger ones. — Name 

 mythological. 



73. Eumelus nehulosus. Body nearly cylindrical, rounded at 

 both ends ; back smooth, crowded with grey and fulvous spots inter- 

 mixed of the same tinge, without spots beneath ; tentacula brown. — 

 Length about one inch ; in Ohio and Kentucky. 



74. Eumelus lividus. Livid brown above, greyish beneath, 

 antenna black, obtuse behind, back smooth and convex. — Length 

 one inch ; in Ohio, Indiana and Kentucky. 



75. Limax gracilis. Body slender, head and lower tentacula 

 fulvous, neck grey, upper tentacula brownish, mantle dark fulvous, 

 back smooth brown, beneath dirty white ; tail brown, obtuse above, 

 mucronate and acute beneath. — Probably a real Limax. Yet it has 

 the two long tentacula inserted above the neck, while the small ones 

 are terminal, and all slightly club shaped. It may perhaps form a 

 sub-genus Deroceras. Length over one inch. Found near Hen- 

 dersonville in Kentucky, and in woods. 



XVIII. K G. Hemiloma. (Univalve land shell.) Spire raised 

 and smooth ; opening obliqnal elliptic, with an interior raised half 

 margin on the inside lip, a httle twisted ; Columella decurrent on 

 the whorl obliquely and with a very small umbilicus. — The name 

 means half margin. 



76. Hemiloma ovata. Ovate, very obtuse, smooth, six spires, 

 breadth two-thirds of the length. — Found near Lexington, in nearly 

 a fossil state, by Mr. John D. Clifford ; whitish, length three- 

 sixteenth of an inch. 



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77. Pleurocera verucosa. Ellipsoidal, top very obtuse, base of 

 the opening obtuse, inside lip thickly plaited ; four spires, the two 



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