STROPHOCIIEILUS. 121 



than the corresponding suture above it. This subspecies may be 

 called pergranulatus, as it is clearly differentiated from the typical 

 bronni, in which the granulation becomes obsolete on the last whorl, 

 and the latter half-turn of the suture usually descends more obliquely. 

 Type no. 71231 coll. A. N. S., from no. 912 of von Ihering's 



register. 



S. FRAGILIOR von Ihering, n. sp. PI. 20, h'gs. 60, 61. 



Shell imperforate, oval, as solid as S. bronni, the last whorl of a 

 deep, rich brown color with darker streaks, preceding whorls pro- 

 fusely maculate and suffused with golden-buff. 3^ nepionic whorls, 

 with sculpture of granules in spiral series, and strong, short folds, 

 not so close as in S. bronni, and almost disappearing near the end of 

 the nepionic period. Spire short; whorls 4 ; last half of the penul- 

 timate whorf bulging and. prominent, widening with great rapidity. 

 Last 1-J- whorls densely and evenly malleated throughout, showing some 

 appearance of spiral sulci, and minutely wrinkled and granulose, the 

 granulation like that of S. bronni, becoming much sparser on the 

 last half whorl, and less regularly arranged in spiral lines. Aperture 

 subvertical, acutely ovate, bluish within, the peristome thick, 

 narrowly subreflexed, bright rose colored. Columella concave, 

 roseate. Length 89, diam. 54, longest axis of aperture 57^ mill. 



Brazil: Rio Grande, Sao Paulo. Type no. 1119 coll. Museu 

 Paulista. 



Well distinguished by the very short spire, bulging penultimate 

 whorl, excessively oblique descent of the last half-turn of the suture, 

 and the even malleation. which is much more pronounced than in 

 bronni. Though a larger shell, it has the fraction of a whorl less 

 than bronni. 



S. AURITUS (Sowerby). PI. 23, fig. 97. 



Vol. x, p. 2G. The specimen here figured differs from those for- 

 merly illustrated so much that further exposition is needed. Tested 

 by the key (vol. x, p. 11), it comes to cantagallanus. The- body- 

 whorl is yellowish-brown with some darker streaks, the spire dark 

 reddish-brown ; suture bordered below with a pale band. Surface 

 minutely striolate vertically and everywhere very finely granular. 

 Nepionic shell of 3^ whorls, sculptured with rather widely-spaced 

 narrow and rather low radial folds, subobsolete toward the latter part 

 of the nepionic period. A contraction marks the beginning of the 



