ART. 22 MIOCENE GASTROPODS AND SCAPHOPODS— MANSFIELD 37 



on the spire- whorls from suture to suture and on the body whorl for- 

 ward to a little below the base. Aperture rather narrow, linear, pos- 

 terior extremity rounded and commissure shallowly furrowed; ante- 

 rior extremity well rounded; outer lip with a strong: marf^jnal varix, 

 anchored posteriorly above the suture; inner margin ornamented with 

 six denticles which do not enter beyond the varix; the posterior one 

 is about one-fifth of the margin length from the end and about the 

 same distance from the following anterior one, the others are closer- 

 spaced and slightly reduced in size anteriorly. Pillar provided with 

 four equal-sized and equally-spaced plications — the posterior two 

 transverse and the anterior two oblique. 



Dimensions: Type (U. S. Nat. Mus. Cat. No. 352649) measures: 

 Length 3.5 mm.; greatest diameter 1.8 mm.; length of aperture 

 1.8 mm. 



Type locality: Station 8302, in flood-wash, Caroni County, Mont- 

 serrat Ward, 1 mile south of Brasso. 



The new species here described differs from M. {Faba) buUhrooki^ 

 new species, in having a much longer spire and fewer denticles along 

 the inner margin of the outer lip. 



Occurrence. — Middle or lower Miocene : 9212, (?) 9027 (one imper- 

 fect specimen). 



MARGINELLA GUPPYANA, new species 



Plate 6, figs. 1, 2, 3 



Shell of moderate size, pyriform, spire short and acuminate, about 

 four whorled. Suture appressed. Whorls marked by a spiral stria 

 below and near the sutuie. Surface of body whorl slightly depressed 

 behind the rounded shoulder and marked by wide-spaced, axial 

 ridges extending from the spiral stria forward to the peripheiy of 

 the whorl. On smaller specimens assigned to this species, these 

 ridges extend nearly across the body whorl; the interspaces on the 

 spire slope are deeply excavated. The posterior end of the outer lip 

 is a little higher than spire and its margin is anchored to the spire 

 by a wash of callus; margin arcuate and bordered by a strong lip- 

 varix. Columella medially concave and provided with four strong 

 plications — posterior two transverse and terminating farther within, 

 anterior two oblique and extending externally upon the prominent si- 

 phonal fasciole. The anterior one marginates the canal and fuses 

 with the lip-varix. 



Dimensions: Type (U. S. Nat. Mus. Cat. No. 352650) measures: 

 Altitude 18 mm. ; greatest diameter 14 mm. 



I am unable to find a close relative to this new species. 



Occurrence. — Middle or lower Miocene : St. Andrew County. Man- 

 zanilla Ward. Manzanilla coast. 



