MAZATLAN UNIVALVES 493 



Tablet 2357 contains 6 normal opercula. 2358, 10 abnormal 

 do. nucleus more or less central. 2359, 2 do. irregularly 

 repaired after fracture. 



618. PCOLUMBELLA CEEVINETTA, n. S. 



? C. t. parvd, plerumque Icevi, spird subelevatd, marginibus 

 excurvatis : color eflavido-fusco,fasciis spiralibus iii. purpureo- 

 fuscis, fascia juxta suturam aurantid ; maculis rotundatis 

 albis, nisi suturam versus, omnino conspersd ; anfr. iii. nucleosis 

 Icevibus, compactis ; dein ii. radiatim costatis, costis planatis, 

 parum expressis ; dein iii., nisi lirulis circa basin spiralibus, 

 omnino Icevibus ; anfr. planatis, suturd haud impressd : aperturd 

 subelongatd, labro acuto, vix denticulato ; labio conspic-uo, Icevi, 

 parum extante. 



Only one specimen was found of this very beautifully 

 painted species. In the pattern it somewhat resembles Niti- 

 della cribraria ; but the spire is distinct. Long. '27, long, 

 spir. '14, lat. *12, div. 40. 

 Sab. Mazatlan ; 1 fresh sp. ; ISpool Col. 



Tablet 2360 contains the specimen. 



618, b. ? COLUMBELLA CEEVINETTA, Var. OBSOLETA. 



? C. cervinetta, t. tninore, anfr. Icevibus ii. ; albid*d, rufocas- 

 taneo obscure fasciatd, maculis albis subobsoletis ; labro dcntato. 



One young and one adult sp. were found, differing as above ; 

 but the similarity of the upper whirls, general pattern and 

 habit, seem to mark them as conspecific. The adult measures 

 19 by '08. 

 Hab Mazatlan ; 2 sp. off Spondylus ; L'pool Col. 



Tablet 2361 contains the adult. 



GENUS PMETULA, H. fy A. Ad. 



Gen. vol. i. p. 84. Shell resembling Daphnella. 

 Buccinum (pars) auct. 



619. P METULA , n. s. (a) 



Tablet 2362 contains a young shell, with 4 smooth nuclear 

 and more than two normal whirls -, elongated, white, very 

 March IStf. tt 



