

SEGUENZIA. 47 



Yar. NITIDA, Yerrill. 



Thinner, more translucent, with less acute spire, and more 

 delicate sculpture, the spiral lines on the base more numerous 

 and closer. 



S. ERITIMA, Yerrill. PI. 8, fig. 74. 



Sculpture more delicate, carinae less acute, riblets finer and 



closer, basal lines finer and more numerous than in the pre- 



ceding species ; it is also narrowly umbilicated. Length, 4'5 mill. 



Off New England, 1290, 1467 and 2033 fins. 



S. ELEGANS, Jeffreys. PL 8, fig. 75. 



Umbilicated, shorter, more globose than S. eritima, lip fissure 

 close to the suture, columella produced below, aperture broadly 

 truncately sinuous on the base. Length, 3 mill. 



Bay of Biscay. 

 S. TRICARTNATA, Jeffreys. PI. 8, fig. 76. 



Umbilicus narrow, slightly keel-margined; depressed-globose, 

 convexly shouldered above, then three-keeled ; lip fissure wide 

 and shallo/w, aperture narrowly produced at the base ; white. 



Length) 2 mill. 



Off Cape Verd Is.; 1192 fms. 



Not adult. 



S. IONICA, Watson. PI. 8, figs. 77, 78. 



Umbilicated, depressed trochiform, with two strong spiral 

 ridges and a number of basal striae most distinct around the 



O 



outer margin, and surrounding the umbilicus. Diarn. 6 mill. 



W. of Azores ; West Indies. 



S. TRISPINOSA, Watson. PL 8, figs. 79, 80. 



Umbilicated, elevated trochiform, suture deep, with three 

 rather close tubercular spiral ridges, base with numerous spiral 

 striae, the outer one much more distinct. Diam. 3'75 mill. 



Pernambuco. 

 S CARINATA, Jeffreys. PL 8, figs. 81-83. 



Umbilicated, rather smooth, with a single peripheral carina, 

 showing at the base of the spire-whorls, base nearly smooth. 



Diam. 4 mill. 



N. Atlantic *Bay of Biscay, Canaries, Azores, Pernambuco. 



