OF MOLLUSKS FROM MAZATLAN. 27< 



223. The length should be 1-1. 



319. For " labia nulla" read " tenuissimo " 



330 The nuclear shell has two whorls, AmpuUaria-Bh&Tpei. 



367. Add to diagnosis, " operculo cancavo, tinea elevata suiuram definiente," 



368. Add to diagnosis, "operculo vix concavo, suturis minus definitis." 



373. Add to diagnosis, "operculo concave, suturis distinctis, peripherian 

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

 Olivellw. 



376. Add to diagnosis, " operculo concavo, suturis vix definitis." Living 

 among Olivellm. 



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

 written, tablet 1966 contains a much liner shell, since found, which allows of th 

 following additions to the diagnosis : — "vert nucl.parvo, satis extante, deck 

 viter sita ; anfr. norm, v ; interstitiis carinarum iransversim rugulosis ; labr 

 eolidiore. Long. 087, long, epir 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 has one more whorl • vertex Chemmtzoid, of three Helicoid whorls, scarcel, 

 projecting ; apex hidden 



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

 —" epidermide fimbriata, linclas sptrales eleganter decussante." 



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



" (h.) Operculum corneum, intus convexum, nitidum, undone magno extante 

 actus concavum, paucispirale, lamina extante suturas definiente. Diam. '045. 

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

 the Spom£%'?MS-washings. 



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



Page 314, note * (et seq.), for " Inflatulum" read " Mioceraa." 



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



261 



