^20 AMERICAN JOURNAL 



impressed ; aperture subvertical, narrow, contracted, five-lobed, 

 "whitish ; peristome with a stout external varix, inner margin la- 

 biate, rounded beneath, sinuous above, and furnished with two 

 stout tubercular teeth on the middle of the inner lip ; columella 

 expanded, with an oblique compressed fold ; parietal region 

 thinly callosed, with two teeth, the upper small, tubercular, di- 

 rected towards the opposite upper labial tooth, the lower one 

 compressed, bifurcate and entering the aperture. 



Length, 7 mill. ; diam., 4*5 mill. 



Habitat, Viti Isles. (Coll. Garrett and Philad Acad.) 



Not uncommon under stones near high-water mark, it is 

 about the same size as P. clausa, but differs in color, size of sul- 

 cations, and character of the labial teeth. 



Ophicardelus paludosus, Garrett. Plate 19, fig. 3. 



Shell imperforate, ovate, solid, whitish or brownish horn color; 

 spire short, convexly conical ; whorls 7 — 8, slightly convex, the 

 last large, convexly rounded, decussated with fine longitudinal 

 striae and transverse impressed lines, the latter minutely punc- 

 tured and garnished with short hairs ; base rounded and keeled ; 

 suture margined ; aperture sub-vertical, auriform, contracted, 

 white or brownish, little more, than half the length of the shell; 

 peristome obtuse, right margin stoutly ribbed, inner edge labiate, 

 sinuate above, rounded beneath ; columella expanded, with two 

 oblique compressed folds, the upper the larger ; parietal region 

 slightly glazed, and furnished with a small tubercular tooth. 



Length, 10 mill. : diam., 6 mill. 



Habitat, Viti, Wallis and Samoa Islands (Coll. Garrett and 

 Tryon.) 



An abundant species found crawling over the black mud in 

 Mangrove Swamps. 



Pythia lentigxnosa, Garrett. Plate 19, fig. 4. 



Shell perforate, solid, acute-ovate, compressed, yellowish-white, 

 profusely mottled with small irregular light brownish spots, and 

 dashes of deeper brown on the sides ; spire convexly-conical, less 

 than half the length of the shell; whorls nine, flatly convex, last one 

 convexly-rounded, longitudinally coarsely striated, striae most con- 

 spicuous above; base rounded; aperture narrow, subvertical, honey 

 yellow; peristome slightly expanded and a little reflected below, 

 simple above, the inner margin garnished with from five to six 

 tubercular teeth, two of which are much the larger ; columella ex- 



