410 MAZATIAN UKIVALVE8 



jffah. — Panama, 1 sp. C. B, Adams. — PMazatlan ; 1 young sp., 

 off Chama ; L'pool Col. 



Tablet 1951 contains tlie specimen. 



Genus ODOSTOMIA, Flem. 



Edinh. Encycl. 1817, p. 130. 

 Jaminea, Brown, Couth. &c. 

 Odontostomia, Phil, in Zeit.f. Mai. 1849, p. 28. 

 Odontostoma, Phil. Handb. Cowc/^ p. 192 : non D'Orb. ; nee 

 Odontostomus, Beck. 



For convenience' sake, the genus is here restricted to the 

 smooth species ; the sculptured forms being located under 

 Parthenia ; and the pupiform species under Chrj'^sallida. 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 tj^pical forms in having 

 the peritreme continuous. 



Section A. Peritreme not continuous. 



487. Odostomia sublieulata, n. s. 



O. t. ovoided, subohlonga, subdiaphand, albd ; avfr. nucleosis 

 declivibus, in truncatione latiore celatis ; avfr. iv. normalibus, 

 subrotundatis, suturis distinctis, basi clongatd. haud umbilicatd ; 

 in spird, Icevi ; infra peripheriam lirulatu, lirulis subobsoletis, 

 rotundatis, interstitiis parvis ; aperturd ovatd, labro acuta ; 

 peritremati circa basin usque ad parictem continuo ; labio in 

 pariete nullo ; plica transversa, obtusiore, conspicud. 



One beautifully perfect specimen was found of this elegantly 

 formed species, agreeing with the typical forms in not having 

 any parietal lip. Lont/. '078, lu>ic/. spir. '038, lat. "042, div. 28'^. 



Sab. — Mazatlau ; 1 sp. off Spondylus ; L'pool Col. 



Tablet 1952 contains the specimen. 



488. Odostomia , sp. ind. 



Tablet 1953 contains a portion of a specimen larger thaa 

 O. subljrulata, with the whirls planate, and with very fine 

 distant indented strise over the whole surface. 



.Hai.— Mazatlan ; 1 sp. off Spondylus ; L'pool Col. 



