TULOTOMA. 



33 



TULOTOMA, Haldeman. 



Soft parts of the animal, and lingual dentition unknown. 

 Operculum with the nucleus simple. Shell thick, 

 pointed-conic, imperforate ; whirls flattened, nodu- 

 lous, carinated, with a dark olivaceous epidermis ; 

 peristome thin, continuous. 



Fig. 61. 



(^jf Operculam ot 

 Tulotoma 

 magnifiea. 



Fig. 62. 



Tulotoina magnifiea, Conrad — Shell subovai«, 

 ventricose, with two spiral bands of prominent lubercles 

 on the body whirl, and one revolving near the base 

 each whirl of the spire ; suture profoundly impressed, 

 margined by an obtuse, subnodulous, prominent line ; lines 

 of growth very oblique and prominent ; obscure spiral striae ; epidermis 

 olive ; within bluish, often with purple bands. 



A beautiful species when perfect, occurring in vast 

 abundance on the masses of calcareous rock, which 

 have fallen from the strata above into the Alabama 

 River at Claiborne. I found it living only in such 

 situations, and exclusively within a range of six or 

 eight miles. In the Tombeckbee or Black Warrior 

 Rivers, I never observed a specimen of it, although I 

 searched particularly for it on the rocks at St. Ste- 

 phen's. (Conrad.) 



Paludina magnifiea, Conrad, N. Fr. W. Shells, 1834, 



p. 48, pi. viii, fig. 4 ; ed. Chenu, 23, pi. iv, f. 



21.— DeKay, N. Y. Moll. (1843), p. 86.— Kuster 



in Chemn., ed. 2, 1852, p. 23, pi. v, figs. 3-6. — Philippi, Conch., 



Ill, 1, pi. i, figs. 1, 2 (1848).— MiJLLER, 1838, Syn. test, anno 1834, 



promulg. 39. — Reeve, Con. Icon, xx, f. 54 (1863). 

 Paludina bimonilifera, Lea; Tr. Am. Phil. Soc, V, 58, pi. xix, fig. 71, 



date of title, 1837.— Ib., Obs. I, 170.— DeKat, N. Y. Moll. 87 (1843). 

 Paludina angulata, Lea ; Tr. Am. Phil. Soc, IX, 22 (1844).— Ib., Obs. IV, 



22. Proc. II, 83 (1841). 

 Tulotoma, Haldeman, Mon. I, Suppl. 2. 



Operculum horny, subtri angular, with a lateral nucleus and con- 

 centric striae. A continuous elevated, heavy, revolving line 

 sometimes takes the place of the nodules. The interior of the 

 aperture varies from pure white to a rich dark purple; it is 

 sometimes of a salmon color ; the bands are also very variable 

 in number and width. There are also sometimes dark- green 



Paludina magnifiea. 



