158 MICROCERAMUS. 



PILSBRY, Nautilus, xi, p. 107 (name only) ; xii, p. 23 (June, 

 1898). 



A species of the rocky hill-country, living under stones, 

 often with Holospira. Strebel, on the authority of Jacob 

 Boll, reports it from Dallas, Texas; but this place is in a 

 region of different physical character, and it is not likely 

 that Boll got his specimens there. It is closely related to 

 M. concisus, which however is less wide and has more whorls 

 in the same length; also to the east Mexican M. mexicanus, 

 a less wide and more conic shell. The specimens figured are 

 from New Braunfels, the type locality. 



5. M. PONTIFICUS (Gould). PL 26, figs. 17, 18, 19, 20. 



Shell shortly rimate, turrited-conic, tapering from the last 

 or the penultimate whorl, rather solid. Whitish, with a cream 

 or brownish tint, marked with a few triangular or lunate 

 brown spots. Surface regularly sculptured with oblique rib- 

 striae, alternate riblets projecting and enlarged into papillae 

 at the suture, which is thereby made strongly serrate. Whorls 

 9 to 11, convex, the last with a low, cord-like keel below. 

 Aperture rounded, the peristome expanded and narrowly re- 

 flexed, columellar margin dilated. 



Length 12, diam. above aperture 4 mm. 



Length 8.3, diam. above aperture 3.3 mm. 



Southeastern Florida: vicinity of Miami. 



Pupa pontifica GLD., Proc. Bost. Soc. N. H., iii, p. 40 

 (June, 1848); Otia Conch., p. 205; in Binney's Terrestr. 

 Moll. U. S., i, pp. 109, I28.Cylindrella -p. GOULD, Terr. 

 Moll., ii, p. 306, pi. 69, f. 1. Macroceramus pontificus Gld., 

 TRYON, Amer. Journ. Conch., iii, p. 301, pi. 14, f. 20. 

 PFEIFFER, Monogr., vi, p. 350. BLAND, Ann. N. Y. Acad. 

 Sci., ii, p. 127. W. G. BINNEY, Manual of American Land 

 Shells, p. 414, f. 456. RHOADS, Nautilus, xiii, p. 45 (Miami). 

 M. kieneri PFR., Monogr., iv, 689 (in synonymy). BINNEY 

 & BLAND, Land and Fresh- Water Shells of N. A., i, p. 220 ; 

 Terr. Moll., v, p. 385. Not M. kieneri Pfr. 



Quite distinct from the other forms of the gossei group by 

 its larger size, coarser sculpture and very conspicuously and 



