SOUTH AFRICAN MARINE MOLLUSKS. 177 



Genus FISSURIDEA Swainson. 



FISSURIDEA ELIZABETHAE Smith. 



Cat. No. 186891, U.S.N.M, one specimen from Port Alfred (Coll. 

 No. 261). 



FISSURIDEA SPRETA Smith. 



Cat. No. 186893, U.S.N.M., one specimen from Port Alfred (Coll. 

 No. 263). 



FISSURIDEA ELEVATA Dunker. 



Cat. No. 98040, U.S.N.M., two specimens from Peddie or Albany, 

 South Africa. Cat. No. 186894, U.S.N.M., one specimen from Port 

 Alfred (Coll. No. 264). 



FISSURIDEA CALYCULATA Sowerby. 



Cat. No. 98039, U.S.N.M., four specimens from Peddie, South 

 Africa. Cat. No. 186892, U.S.N.M., one specimen from Port Alfred 

 (Coll. No. 262). Cat. No. 249778, U.S.N.M., three young specimens 

 from the same place (Coll. No. 1050). Cat. No. 249779, U.S.N.M., 

 three additional young specimens from the same locality (Coll. No. 

 1051). 



FISSURIDEA AUSTRALIS Krauss. 



Cat. No. 227801, U.S.N.M., two specimens from Port Alfred (Coll. 

 No. 896). 



FISSURIDEA PARVIFORATA Smith. 



Cat. No. 187134, U.S.N.M., three specimens from Port Alfred (Coll. 

 No. 680). Cat. No. 250569, U.S.N.M., an additional specimen from 

 Port Alfred (CoU. No. 1442). 



Genus PUNCTURELLA Lowe. 



PUNCTURELLA AFRICANA, new species. 

 Plate 30, figs. 4, 5. 



Shell small, white, exceedingly delicate. The nucleus consisting of 

 a little more than one whorl, the coil resting on the left side of the 

 postnuclear portion of the shell. The postnuclear part of the shell 

 increases very rapidly in size, the sides being marked by about 40 

 thread-like radial riblets which are a little more densely spaced on 

 the anterior portion. These are crossed almost at right angles by a 

 second series of raised threads which equal the first in strength and 

 spacing, thus lending the surface a finely reticulated aspect. The 

 plug filling the notch is transversely notched. The shell is so thin 

 that all the external markings are seen within. 



The type, Cat. No. 187135, U.S.N.M., comes from Port Alfred 

 (Coll. No. 681). It measures: Altitude, 1.1 mm.; long diameter, 1.9 

 mm.; transverse diameter, 1.3 mm. 



