296 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 56. 



Page. 



Leptothyra 358 



Limatofusxis 318 



Liotia 358 



Lirularia 365 



Lissospira 368 



lAttorina 348 



Littorivaga 348 



Lora 302 



Mangilia 304 



MargariSes 363 



Marginella 306 



Melaraphe 348 



Molleria 358 



Murex 332 



Ne.ptunea 336 



Nitidella 331 



Nitidoscala 341 



Omphulius 359 



Pachypoma 356 



Phenacopiygma 308 



Philbertia 304 



Philine 300 



Pirenella 346 



Plicifusus 314 



Progabbia 306 



Pseudomurex 339 



Pseudorotella 369 



Pa"'. 



Pupillaria 363 



Purpura 332 



Retifusus 314 



Return 297 



Ruma 353 



Scaphander 299 



Schismope 370 



Scissurclla 370 



Seguenzia 343 



Sinum 354 



Solaricida 361 



Solariella 360 



Sphenia 370 



Strigatella 308 



Stylidium 345 



Tachyrhynchus 346 



Teinostoma 369 



Torellia 355 



Tritonalia 333 



Tromina 336 



Trophonopsis 338 



Turritellopsis 347 



Typhis 339 



Velutina 355 



Volutopsius 310 



Volvulella 297 



Zetekia 305 



DESCRIPTIONS OF THE SPECIES. 



ACTEOCINA SMIRNA, new species. 



Shell miDute, white, with yellowish periostracum, of about four 

 whorls with a very minute subglobular hardly projecting glossy 

 nucleus; summit of spire with the whorl but little raised, flattish but 

 not excavated between the suture and the bluntly rounded shoulder; 

 shell in front of the shoulder subcylindrio, with fine axial incremental 

 lines; aperture narrow, outer lip thin, nearly straight, rounding in 

 front into the rather wide, slightly excavated pillar which near the 

 body carries a single strong plait; body with a thin coat of enamel, 

 the umbilical region slightly impressed but imperforate; length, 4; 

 diameter, 2 mm. U. S. Nat. Mus. Cat. No. 271492. 



Type-locality. — San Diego, California, C. R. Orcutt. The range 

 of this species extends southward to San Salvador. 



ACTEOCFNA MAGDALENENSIS, new species. 



Shell small, slender, subcylindric, translucent white, polished, with 

 four whorls, the nucleus minute, subglobular, transparent; suture 

 distinct, more or less channeled, spire short but distinctly turrited 

 aperture narrow, outer lip straight, rounding below into the thickened 



