EASTERX PROVINCE — SOUTHERN REGION SPECIES. 423 



Cylindrella Goldfussi, Menke, in Zeitcsh. f. Mai., 1847, iii, 2. — Pfeiffer, Moii. Hi 1. 



Viv., ii, 383.— PniLiPPi, Icon., iii, 6, tab. iii, 9(1847).— W. G. Bixney, Terr. 



Moll., iv, 151, pi. Ixxix, fig. 33; L. & Fr.-W. Sh., i, 24, tig. 19 (18(39). 

 Holospira Goldfussi, Tryon, Amer. Joiiru. Conch.,, iii, pi. xv, fig. 31 (1869). — W. G. 



BiNNEY, Terr. Moll., v, 177. 



Texas, on the Blanco ; a species of the Texas Subregion. 



lu the penultimate whorl of Ooldfussit\i&YQ are 4 lamellae; one, strongly 

 developed, situated on the under side of the upiier septum, and in 

 length about equal to one halt' of the circumference of the whorl ; 

 another on the upper surface of the lower septum, immediately beueatli 

 and opposite to the above-mentioned lamella, and of about equal length 

 but not so much developed ; a third lamella'on the middle of the lower 

 half of and revolving on the axis ; the fourth on the inner side of tbe 

 outer wall of the shell (opposite the axial lamella) and visible from the 

 exterior. 



For lingual membrane and jaw see above. 



STENOGYRA, Shuttl. 



Animal: see \\vh\q,v Bumina. 



Shell turreted, sometimes truncated, hyaline or white, with a delicate 

 horn-colored, sometimes reddish epidermis; whorls straight, numerous, 

 7-13, gradually enlarging; apex obtuse; aperture serai-oval or ovate- 

 oblong ; peristome straight, generally simple ; columella usually trun- 

 cated. 



For further details see under each subgenus. 



I have not been able to examine the jaw or lingual dentition of 8. 

 octouokles {S. Huhiila of L. & Fr.-W. Shells, I) or S. gracilUina, but only 

 M defollata, Liu., from Charleston, S. C, a species introduced from 

 Europe by commerce, and the true S. siihiila, found near Mobile, Ala. 

 Of extralimital species I have examined /S'. octona, gonostoma, and hasta. 

 Semi)er has examined 8. Panayensis. 



The jaw (s"c Fig. 4G9 for that of 8. snhiila) is low, wide, with attenu- 

 ated, blunt ends, and a wide, slightly pig. 470. 



"Pin Ar.n 



])rodu('ed median projection. There are _^ 



^ 'I 

 distinct vertical ttrisd on that of 8. de- -^ JL 



coUata. 



Jaw of S. subula. Lingual dentition 



The lingual membrane is long and nar- «>f ^- subuia. 

 row. The central tooth has a very small, high, narrow base of attachment, 

 the lower outer angles generally somewhat expanded. The reflected 

 portion is very small, and bears a short, stout median cusp and two 



