286 Zoological Society. 



7. A Monograph of Puncturella, a genus of Gasteropodous 



MOLLUSCA, BELONGING TO THE FAMILY FiSSURELLIDjE. 



By Arthur Adams, R.N., F.L.S. etc. 



Genus Puncturella, Lowe. 



Head proboscidiform, tentacles subulate, with the eyes on swell- 

 ings at their outer base ; sides with a range of cirrhi, interrupted be- 

 hind on each side ; mantle-margin simple ; branchial plumes two ; 

 anal siphon prominent, forming a truncated membranous canal pro- 

 jecting from the subapical perforation. 



Shell conical, with an elevated, slightly recurved, obliquely spiral 

 entire vertex, turned towards the posterior end ; aperture expanded, 

 oval ; surface with radiating ribs ; margin entire ; a linear perfora- 

 tion in the upper part of the shell, between the vertex and front 

 margin, in the line of an elevated rib. Interior with a linear groove, 

 vaulted over with a shelly plate corresponding to the perforation ; 

 muscular impression crescentic, interrupted in front. 



Cemoria, Leach, MSS. — Sipho, Brown. — Rimula, Loven ; Gould ; 

 Couthouy. — ? Diadora, Gray. 



1 . Puncturella Noachina, Linnaeus. 



Patella noachina, Linn. Mantissa, p. 551 ; Chemn. Conch. Cab. 

 vol. xi. p. 186. pi. 197. f. 1927, 1928.— Patella Jissurella, Miiller.— 

 Fissurella Noachina, Schum. — Puncturella Noachina, Lowe. — Ce- 

 moria Flemingii, Leach, MSS. — Cemoria Noachina, Lowe. — Rimula 

 Flemingii, Macgill. — Rimula Noachina, Couthouy. — Sipho Noachina, 

 Brown. 



Hab. British Islands. Mus. Cuming. 



2. Puncturella cucullata, Gould. 



Ritnula cucullata, Gould, Expedition, Shells, p. 14. 

 Hab. Puget Sound. 



3. Puncturella galeata, Gould. 



Rimula galeata, Gould, Expedition, Shells, p. 14. 

 Hab. Puget Sound. Mus. Cuming. 



4. Puncturella cognata, Gould. 



Rimula cognata, Gould, Expedition, Shells, p. 14. 

 Hab. Orange Harbour. 



5. Puncturella conica, D'Orb. Voy. Am. Mer. 



6. Puncturella fastigiata, A. Adams. P. testd albidd ele- 

 vnto-conicd, nitidd, vertice acuminato involuto, costellis longitu- 

 dinalibus cequalibus cequidistantibus, interstitiis planis lineis 

 incrementi concentricis ; fissurd lanceolatd; aperturd ovali, 

 margine crenulato, fornice costd, costd valde arcuatd, transver- 

 sali, simplici. 



Hab. Eastern Seas. Mus. Cuming. 



