from the West Coast of North America. 3 



crebris, vix extantibus, interstitia, costas auriculasque transeunti- 

 bus. Long. 3"2, lat. 3'35, alt. 1'5. 



Hab. Sta. Barbara (Jewett) ; S. Diego (Cassidy, Newberry, 

 Cooper}. 



Intermediate between tbe tropical P. venlricosus and the 

 Atlantic P. irradians. 



161. 1'ecten '*fiur.icostatus. 



P. tes^a anbconvexa, vix requilaoerali ; cas'aneo sen rubido seu elec- 

 tri'.- * ( 'ii-;ta; costis xi.-xv., validis, angustis, rotundatis ; mter- 

 sti-.is multo latioribus, subp'ianatis ; tota superficie minutissime 

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

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

 tata, ad suturas auricularum tuberculosa ; fossa ligameatali curta, 

 transversim lata. Long. 1'7, lat. T84, alt. *56. 



Hab. Sta. Barbara (Jewett)} Sta. Barbara Island (Cooper). 



Pecten (? var.) squarrosus. (Page 536.) 



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

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

 adulta interstitiis sequalibus ; costis et interstitiis regulariter un- 

 datis, striis crebris squamosis r;;diantibus ubioue ornata ; auriculis 

 magnis, latissimis, subaequalibus ; antica anguste fissata, serrate, 

 postica sinuata ; auriculis anibabus et regione contigua scabrose 

 striatis : intus alba, linea cardinal! alte sulcata. Long. T&l', 

 lat. 179, alt. '9. 



Hab. " Sta. Barbara," teste Jewett. 



Kesembles a sbell in Mus. Cuming., marked " exasperatus, 

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

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

 firmation. 



183. Volvula cylindrica. 



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

 raedio planato, marginibus fere parallelis ; antice satis effusa, 

 postice subito angustata ; canali brevissimo ; labro acuto ; labio 

 indistincto ; plica columellari parva, valde declivi. Long. 1 7, 

 iat. -07. 



Hab. Sta. Barbara (Jewett). 



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



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

 tumentibus ; omriino minutissime fusco punctata ; columella lacn- 

 pat3. Long. '24, long. spir. *12, lat. '14, div. 50. 



Hab. S. Diego (Jewett). 



281 



