228 



and as he seems to have the tvpe, his opinion is followed. Mr. 

 Reeve's reference to the Nouv. Ann. Mus. cannot be verified. It 

 appears to have been pubhshed by Kiener from a manuscript name. 



112. Purpura harpa, Conr. Journ. p. 266. pi. 20. f. 25. 

 Hab. Sta. Barbara. Mus. Nuttall. 



— 113. Purpura emarginata, Desh. 



= P. Conrndi, Nutt. :MS. ; teste Jay, Cat. 8972. Mus. suo. 

 Hab. Califomia. 



' 114. MONOCEROS ENGONATUM, Conr. 



P. (Monoceros) engonata, Conr. Journ. p. 264. pi. 20. f. 17: 

 diagn. auct. 



"M. t.fnsifonni; anfractibus superne angulo saliente carinatis, 

 spiraliter sulcatis, striis incrementi vix decussatis ; anfr. tertio 

 longitudinaliter costellato ; pallida, maculis fuscis, intensiori- 

 bus, angulatis, ornata ; intus aJha, maculis jta^'cis purpureis ;" 

 apertura valde elongata ; canali hand parva ; labro intus den- 

 tibus plurimis ; " acanthina tenui, gracilUma." 



Hab. Sta. Barbara, Mus. Nuttall, Brit., Jay, 9067. 



^ Monoceros unicarinatum, Reeve, Conch. Ic. sp. 1 : diagn. sol., 

 syn. plerumąue excl., pi. 1. f. 1, excl. : non M. unicarinatum, Sow., 

 nec Desh. 



Comp. Purpura spirata, Blauiv. Nouv. Ann. Mus. vol. i. 1832, 

 pi. 12. f. 8. p. 252. no. 105 ; Kien. Icon. Conch. p. 121. no. 76. 

 pi. 38. f. 90. 



= Monoceros unicarinatum, pars, Desh. in Lam. An. s. Vert. 

 vol. X. p. 124. no. 10, syn. Angį. excl. 



The shell figured by Conrad aud found in Mr. Nuttall's collection 

 is very triangular, with a pointed base. The P. spirata of Blain- 

 ville (deseribed and iigured \N-ith his usual accuracy, for which credit 

 has not been given to him by some authors, who, wanting it in their 

 own works, have added great labour to students) is a Sandwich 

 Island shell, brought by 5l. Botta, very obtusely angulated, with a 

 swonen base, scarcely acanthoid, and a canal long enough for Chorus, 

 Gray. It is remarkable for the scaly keel of the upper whorls. This 

 shell is reproduced by Kieuer in a different form, who affiliates 

 Sovverby's species (apparently constituted from aNuttallian specimen 

 received through Dr. Jay by Mr. Cuming) to that iu the Paris Mu- 

 seum. Deshayes, copying this error, aud not eveu adopting Blainville's 

 earlier S])ecifie name, gives the name and reference of Sowerby, with 

 a deseription iu the niain belonging to the Blainvillian species, although 

 perhaps \vith some additions from Sowerby's figure. Mr. Reeve 

 completes the confusion by describing a shell, " anfr. superne angu- 

 latis," verv probably the true P. engonata of Conrad which he 

 quotes ; at the šame time quoting the tvvo different shells above 

 named (one of them under two names, P. spicata and P. spirata), 

 and figuring a very diiferent shell, not angulated at all. To mere 



