MONOGRAPHS OF THE GENERA 



CEMOBIA, CEAXOPSIS, ZEIDOEA, EIMULA, 

 EMARGINULA, SCUTUS, & TUGALIA. 



Br ARTHUR AD AIMS and G. B. SOWERBT. 



Note. — Owing to engagements interfering to prevent the completion of Mr. Adams's 

 manuscript, the arrangement of these monographs and final decision respecting many 

 spei ti - has fallen into the hands of G. B. S. 



The specimens are nearly all from Mr. Cuming's collection. 



Genus CEMORIA, Leach. 

 Plate X. 



Char. Gen. Conica, radiatim costata, apice centrali ; fissura atl 

 apicera posita, fornice interno arcuato. 



In this genus, which is Sipho of Brown, Puncfurdla of Lowe, 

 and Simula of American couchologists, the foramen is situated at 

 the apex of the shell, and is not simple, as in Fissurella, but is 

 furnished with an internal arched process. 



1. noachina (f. 10, 11), Linn. — Conica, apice oblique per- 

 forata, loramine intus coarctato, marginato ; costis minimis, iiife- 

 qualibus, radiantibus ; apice minimo retorto. 



2. galeata (f. 12), Gould. — Solida, cinerea, elevata, globoso- 

 conica, apice centrali, acuto prorsum, porrecto, striis iiliformibus 

 coufertis radiata, et striis minoribus concentricis decussata; fis- 

 sura brevis, fusiformis; apertura rotundato-ovalis; margine ex- 

 panso acuto, minutissime crenulato ; fornice costa transversali 

 amice suffulto, fossam trigoiialem utroque latere formante. 



3. conica (f. 1, 2), IfOvb. — Conica, apice incurvato, acuto, 

 fissura angustata, costis radiantibus aequalibus crassis et striis 

 concentricis decussata; apertura ovali, margine crenulato. Obs. 



vol. m. i c 



