OF MOLLTJSKS FROM MAZATLAN. 27^ 



223. The length should be M. 



319. For " lahio nullo'" read " tentiissimo" 



330 The nuclear shell has two whorls, Ampullarta-sha'ped. 



307. Add to diagnosis, " oprrculo concavo, linea elevata suturam defimcnte." 



368. Add to diagnosis, '■'■opcrculo vix concavo, suturis minus definifis.'" 



373. Add to diagnosis, "operculo concavo, sufuris disfinctis, pcriphcrian 

 versus linea elevata instructis." The species was found living among the smal 

 OHvellcB. 



376. Add to diagnosis, " operculo concavo, sufuris vix defimtis." Living 

 among OlivcUcB. 



501 Instead of the specimen from which the description in the text wa 

 written, tablet 1966 contains a much tiner shell, since found, which al'ovvs of th 

 following additions to the diagnosis : — " vert nucl. parvo, satis extanfc, dccli 

 viter sito ; anfr. norm, v ; interstifiis carinarum transversim rugulosis ; labr 

 solid.iore. Long. 087, long, spir 057, lat. -038." 



510. A very beautiful shell, found in the refuse of Professor Adams's Panam 

 collection, is probably of this species, though the sutural cancellations are close 

 It lias one more wliorl • vertex Chemnitzoid, of three Helicoid whorls, scarcely 

 projecting ; apex hidden 



650. From perfect Cape St. Lucas specimens, add the following to diagnosis 

 —^^ epidermide fimbriata, lirulas spirales elcganfer decussante." 



Page 312. Add to the diagnoses of opercula of VermetidcB : — 



"(A.) Operculum corneum, inttis convexum, nitidum, umbone magna extantf, 

 exfiis concavum, paucispirale, lamina extante suturas definicnte. Diam. -045." 

 Tablet 2537 contains the only specimen found, resembling Siphonium, froQ 

 the Spondylus-vmshmgs. 



Tablet 447 is Liocardium apicinum, which should stand as species 709. 



Page 314, note * {,et seq.), for '^ Infiatidum" read " Mioceras." 



Page 359, line 18, /or "regular" read "irregular." 



261 



