1899.] NATURAL SCIENCES OF PHILADELPHIA. 81 



iuore promiuent spire, flattened area below the suture, larger umbil- 

 icus and no/i-reflected pillar-lip. 



Adeorbis infraplicatus n. sp. Plate II, figs. 13, 14. 



Shell small, spire depressed, nucleus smooth, whorls three, with 

 two prominent revolving ridges, one at the periphery and one mid- 

 way between the periphery and the suture, both are very minutely 

 crenulated, between the two ridges smooth or with very fine revolv- 

 ing lines, from the smooth nucleus radiate fine raised lines that 

 increase in size on the body whorl, these are crossed by fine revolv- 

 ing lines, base of the shell with numerous fine revolving lines, 

 umbilicus of moderate size, margin smooth, nearly half-way across 

 the base from the margin of the umbilicus extend numerous radi- 

 ating plications, ci'ossed by very fine revolving lines. Alt. 1^^ mm., 

 greatest diam. 3 mm. 



Four specimens from the material collected by Thomas A. Mor- 

 gan, at Jackson, ^liss. 



EXPLANATION OF PLATES. 



Plate I. 



Volvaria reticulata n. sp. Length 7^ mm. 



Mitra grantensis n. sp. Length 14 mm. 



Fusus apicalk n. sp. Length 31 mm, 



Fiisus houdonerish n. sp. Length 44 mm. 



Fusus ludovicianus n. sp. Length 29 mm. 



Latirus sutumlis n. sp. Length 8 mm. 



Latirus obtusus n. sp. Length 16 mm. 



Latirus harrisii n. sp. Length 20 mm. 



Latirus sexcostatus n. sp. Length 14 mm. 



Phos hilli Har, var. magnocostatus n, v. Length 15 mm. 



Phos hilli Har. var. jacksonensis n. var. Length 12 mm. 

 Fig. 12. Morio planotecta (Meyer and Aldrich). Length 64 mm. 

 Fig. 13. Typhis dentaUix u. sp. Length 16 mm. 



Plate II, 



Metula bmzosensis n. sp. Length 8 mm. 

 Metula suhgracilis, n. sp. Length 11 mm. 

 Metula gracilis n. sp. Length 14 mm. 

 Columbella punctostriata n. sp. Length 10 mm. 

 Cassis (^Phaliam) taitii (Conrad). Length 35 mm. 



