400 MAZATLAN UNITALTES 



vdtli denticles inside ; notch deep but narrow. Wliirls rounded, 

 with 11 — 13 radiating costse, decussated by spiral strife, of 

 which about 5 shew on the upper whirls, liong. "38, long. 

 spir. -23, lat. -17, div. 32°. 



Hah. — Gulf of JN^icoya ; 18 fm. mud ; Hinds. — Mazatlan ; 2 sp. 

 only ; L'pool Col. 



Tablet 1912 contains the largest specimen. 



472. Clathtjeella aueea, n. s. 



CI. t. valde attenuatd, aurea, ejndermide tenui, interdum 

 aurantid, tinctd ; anfr. ix. convexis, canali infrasuturall latiore, 

 lineis incrementi arcuaUs distinctis ornato ; tubercidis costcB- 

 formihus vuL — x. rotundatis in pei'ipheriam, secundum lineas 

 spirales, iii. in spird, tubereulatis ; anfi\ ult. costulis radianti- 

 hus infra tuherculos confertis, Urulis confertis spivalihus tuber- 

 eulatis ; aperturd et canali subelongatis ; lahro vancoso, crasso, 

 intus dentato ; sinu postico prqfundo, angusto, spiram subascen- 

 dente, supra calloso ; labio tenui, dentato. 



Approaches CI. bicanalifera, Soto, but differs in the narrow 

 slit, and singularly decussated groove. The varix is extremely 

 thick. The costular tubercles which appear on the spire, do 

 not correspond with the narrow crowded ribs which appear on 

 the basal portion. It is more slender than CI. rava, with dif- 

 ferent colour and sculpture. Long. "54, long. spir. '26, lat. '18, 

 div. 25". 

 Sah. — Mazatlan ; 1 fresh specimen ; L'pool Col. 



Tablet 1913 contains the specimen. 



Gencs MANGELIA, Bisso. 



Hist. Nat. Eur. Mer. vol. iv. p. 219, 1826 :— do, LeacTi, ms.— 

 H. Sf'A. Ad. Gen. vol. i. p. 99. (Non Mangelia, Rve. Conch. 

 Je. = Cithara, Schum.) 



Mangilia (err. cor.) Phil. Handb. Conch, p. 38. 



473. Mangelia Pacuticostata, var. stjbangulata. 



31. t. rubro-fuscd, subturritd ; apice hand acutd, anfr. iii. 



Itevibus ; anfr. normalibus iv. + , excurvatis ; costis x. 



acutioribus, subundulatis, ad basin coniinuis, lineis plerumque 

 spiram oblique ascendentibus, ad penpheriam suhangulatis ; 



