from the IVest Coast of Xort/i Ainrrica. 3 



crcT)ris, vix extantibus, iiiterstitia, costas auriculasque transcunti- 

 bus. L.<ng. 3"2, lat. 33.i, alt. 1*5. 



Hah. Sta. Barbara {Jewett); S. Diego [Cassidy, Newberrij, 

 Cuii/jer). 



IiitL'nnetliate between the tropical P. veniricosus and the 

 Atlantic P. irradions. 



IGl. I'-ecten favricostatus. 



P. tcs^a Hnbconvpxr , vix pcquilni-erali ; ca«Mneo sen rnbirlo seu elcc- 

 trir'j jii.tA; ("ostis xi.-xv., talidis, angustis, rotundatis ; inter- 

 stir. is ninlto latioribiis, 8ut)[iianHtis ; tota superficie miimtissime 

 conceMtrice striata ; auriculis latis, hand ttcjualibius linilis circ. vi. 

 oniatis ; siiiu paucidciitato : iiitus j)allidiore, linea cardinis cos- 

 tata, ad sutiiras auricularnm tuberculosa ; fossa ligamentali curta, 

 transversim lata. Long. 1*7, lat. 1"84, alt. '56. 



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



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



P. testa orbiculari,EC(|nilaterali, rubida, albido macr.lata ; valva dextra 

 convexa ; costis xviii., 8e(}ualibiis, testa jun. a[)proxii uti', testa 

 adulta iiiterstitiis ivqualiuus ; costis et interstitiis regulariter iin- 

 datis, striis crebiis »(|uamosis r.-.diHntibus ubioue ornata ; auriculis 

 magnis, latissimis, suljHequalibus : aiitica aoguste fissata, serrat<<, 

 postica sinuata; auriculis auibaijus et regioue contigua scabrose 

 ftiiatis : intus alba, linea cardinaii alte sulcata. Long. 1"8a, 

 lat. 1-79, alt. "9. 



Hab. " Sta. Barbara," teste Jeicett. 



r.csenibles a shell in ]\Ius. Cuming., marked " exasperatus, 

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

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

 tirniation. 



183. Vulvula cylindrica. 



V. testa cyliudracea, allta, nitente, striis spiralibus distantibus cincta ; 

 medio plauato, niaririuibus fere }»arallilis ; autice satis eft'usa, 

 postice hubito angustata ; canali brevissiino ; \a\no acuto ; labio 

 indistiucto ; plica coluuiellari parva, valde declivi. Long, "l/, 

 lat. 07. 



Hab. Sta. Barbara {Jewett). 



2G5. PhasiancUa {? compter, var.) pundulata. 



P. testa P. comptfP simili, sed elati&re; suturis impressis ; aiifractibus 

 tunitntibus; omnino minutissime fusco punctata; columella lacii- 

 patp. Long. -24, long. spir. 'IJ, lat. '14, div. 50°. 



Hab. S. Diego [Jewett). 



281 



