from the JVest Coast of North America. 3 



crebris, vix extantiba^, interstitia, costas auriculasque transeunti- 

 bus. Long. 32, lat. 335, alt. To. 



Hab. Sta. Barbara [Jeivett) ; S. Dk-go [Cassidy, Newberry, 

 Cooper). 



Intermediate between the tropical P. venlricosus and the 

 Atlantic P. irradinns. 



161. Pecten •f.nuncostatus. 



P. test'a inbconvexa, vix pequilsterali ; castaneo seu rnbido seu elec- 

 tric, / |iiita; costis xi.-xv., ralidis, angustis, rotundatis ; mter- 

 stir.is multo latioribus, subpianatis ; tota superficie minutissiine 

 concentrice striata ; aurioulis latis, baud sequalibus, lirulis circ. vi. 

 ornatis ; sinu pauoideiitato : intus pallidiore, linea cardinis cos- 

 tata, ad suturas auricularum tuberculosa ; fossa ligamentali curta, 

 transversitn lata. Long. 1'7, lat. r84, alt. '56. 



Hab. Sta. Barbara {Jewett) ; Sta. Barbara Island [Cooper). 



Peden (? var.) squarroms. (Page 536.) 



P testa orbiculari, sequilaterali, rubida, albido maculata ; valva dextra 

 convexa ; costis xviii., sequalibus, testa jun. approximatis, testa 

 adulta interstitiis sequalibus ; costis et interstitiis regulariter un- 

 datisj striis crebris squamosis r;;diantibus ubioue ornata; auricidis 

 inagnis, latissimis, subsequalibus ; aritica anguste fissata, serrat<ij 

 postica sinuata; auriculis arubabus et regione contigua scabrose 

 striatis : intus alba, linea cardinaii alte sulcata. Long. I'b2, 

 lat. 1-79, alt. -9. 



Hab. " Sta. Barbara," teste Jewett. 



Resembles a shell in Mus. Cuming., marked " exasperatus, 

 var.," but does not agree with the diagnosis of that species. 

 Ail Col. Jewett's valves were dextral. The locality needs con- 

 firmation. 



183. Volvula cylindrica. 



V. testa cylindracea, alba, nitente, striis spiralibus distantibus cincta ; 

 medio planato, margiuibus fere parallelis ; antiee satis effusa, 

 postice subito angustata ; canali brevissimo ; labro acuto ; labio 

 indistincto ; plica columellari parva, valde declivi. Long. '17, 

 lat. -07. 

 Hab. Sta. Barbara [Jewett). 



265. Phasianella (? compta, var.) punctulata. 



P. testa P. compteB simili, sed elatiore; suturis impressis ; anfractibus 

 tumentibus ; omnino minutissime fusco punctata ; columella lacii- 

 iiats. Long. '24, long. spir. -12, lat. -14, div. 50°. 



Hab. S. Diego [Jewett). 



281 



