MONOGRAPH OF THE GENUS 



CYLLENE, Gray. 



Thesaurus, Plate CCXVII. 



Char. Gen. Testa ovata, volutiforrnis ; spira. brevi; sutura in- 

 cisa; apertura ovali, ernarginata; columella antice oblique sul- 

 cata; labio extenio extiis incrassato, antice sinuato, intils sulcato. 

 Operculum corneum, uuguiforme. 



A generic group of Buccinoid shells, agreeing in the following 

 characters : — Oval, with short spire, incised suture, and pointed 

 apex. Columellar lip obliquely striated ; mouth grooved interiorly, 

 deeply notched at the base ; outer lip with a sinus near the an- 

 terior termination. Operculum horny, unguiform, with terminal 

 nucleus. 



1. lyrata (f. 1-4), Lamk., Buccinum, Hist. An. s. Vert. — 

 C. testa pallida, nonnunquam fasciis fuscis seu uigrescentibus 

 interruptis picta, costis obliquis subundatis paucis lirata; spira 

 pyramidali ; anfractibus angulatis, liratis. — This common typical 

 species is distinguished by rather distant oblique ribs, terminating 

 at the angle of the last whorl. West Africa. 



2. fuscata (f. 16, 17, 18), A. Adams, Pro. Zool. Soc. 1850.— 

 C. testa fusca, obscure lineis articulatis cincta, seu pallida, costis 

 numerosis rectiusculis lirata, ad suturam monilifera, infra spira- 

 liter sulcata; spira. acuta; anfractibus angulatis, crebre liratis. — 

 Differing from C. lyrata in having very numerous ribs, which ter- 

 minate at the suture in a series of bead-like knobs. Typical va- 

 riety ; dark-brown, with articulated lines. Singapore, six fathoms, 

 mud ; Malacca, six fathoms, sand, Cuming. 



3. sulcata (f. 10, 11), A. Ad. MS. — C. testa pallida, ovali, 



