410 MAZATLAN UNIVALVES 
Hab.—Panama, 1 sp. C. B. Adams.—? Mazatlan ; 1 young sp., 
off Chama; pool Col. 
Tablet 1951 contains the specimen. 
Genus ODOSTOMIA, Flem. 
Hdinh. Eneycl. 1817, p. 130. 
Jaminea, Brown, Couth. &e. 
Odontostomia, Phil. in Zeit. f. Mal. 1849, p. 28. 
Odontostoma, Phil. Handb. Conch. p. 192: non D’ Orb. ; nec 
Odontostomus, Beck. 
For convenience’ sake, the genus is here restricted to the 
smooth species; the sculptured forms being located under 
Parthenia; andthe pupiform species under Chrysallida. All 
the divisions in this family must be regarded as provisional, 
till we know more of the forms from different seas. Some of 
the following species differ from the typical forms in having 
the peritreme continuous. 
Section A. Peritreme not continuous. 
487. ODOSTOMIA SUBLIRULATA, 7%. S. 
O. t. ovoided, suboblongd, subdiaphand, alhé; anfr. nucleosts 
declivibus, in truncatione latiore celatis ; anfr. iv. normalibus, 
subrotundatis, suturis distinctis, basi elongata, haud umbilicaté ; 
in spird, levi; infra peripheriam lirulata, lirulis subobsoletis, 
rotundatis, interstitiis parvis ; aper tura ovata, labro acuto ; 
peritremati circa basin usque ad parietem continuo ; labio in 
pariete nullo ; plicd transversd, obtusiore, conspicud. 
One beautifully perfect specimen was found of this elegantly 
formed species, agreeing with the typical forms in not having 
any parietal lip. Long. ‘078, long. spir. °038, lat. ‘042, div. 28°. 
Hab.—Mazatlan; 1 sp. off Spondylus; ZL’pool Col. 
Tablet 1952 contains the specimen. 
488. OpostoMIA ————, sp. tnd. 
Tablet 1953 contains a portion of a specimen larger than 
O. sublirulata, with the whirls planate, and with Mery fine 
distant indented striz over the whole surface. 
Hab.—Mazatlan ; i sp. off Spondylus; L’pool Col. 
