NO. 1110. PROCEEDINGS OF THE NATIONAL MUSEUM. 307 



augulated; apex obtuse, tlie three apical wliorls smooth; aperture nar- 

 row, produced into a moderate canal ; lip thickened, notch very distinct. 

 Length mm,, breadth 1.5 mm. [G.] 



Oligocene of Jamaica, Yendryes (Guppy, 2286). No. 107088, U.S.X.M. 

 The preceding species of Gythara are on the border line between the 

 tyi)ical Cijtharcu and the small Mangilia', and might, with almost equal 

 pertinency be included in either subdivision of the genus. 



MANGILIA CONSENTANEA, Guppy, new species. 

 (Plate XXVII, lig. 4.) 



Fusiform-turrited; whorls about 8, sharply angulate, spirally Urate, 

 the strongest thread forming the angle of the whorls and rising like the 

 other threads into knobs upon the longitudinally elongate or variciform 

 tubercles; surface of whorl above the keel nunutely lirate by fine 

 spiral threads, aperture elongate, terminating in a moderate canal. 

 Length G.2 mm., breadth 2 mm. [G.] 



Oligocene of Jamaica, Vendryes (Guppy, 2281»). No. 1070'Jl, U.S.KM. 

 This species is closely related to sucli species as 21. cerhiu, Kurtz and 

 Stimpson, M. UinonitcUa, Ball, and other recent forms which are charac- 

 terized by a microscopiciilly granular surface. 



MANGILIA, doubtful species. 



Oligocene of Jrjuaica, Guppy (2273). No. 107142, U.S.N.M. One or 

 two indeterminable young shells, not of any of the above-mentioned 

 species, were included in the same lot ^^ith Clathurella amicta. 



CANCELLARIA ROWELLI, Dall, new species. 

 (Plato XXIX, tig. 1.) 



Shell solid, acute, with seven moderately rounded whorls; suture 

 well marked; spiral sculpture of numerous flat, little-elevated, narrow 

 bands with narrower interspaces, the bands becoming more rounded, 

 prominent, and somewhat alternated on the base; transverse sculpture 

 of numerous low, narrow, flatfish riblets with their posterior edges 

 higher and sharper, crossing the spirals without interruption except 

 on the base, and slightly nodulated by the two or three spirals in 

 front of the suture ; pillar constricted above the somewhat imbricated 

 siphonal fiisciole; aperture longer than wide, pillar with a wash of 

 callus, and three plaits progressively less strong beginning with the 

 posterior which crowns the fasciole; umbilicus none; body hardly cal- 

 lous; outer lip thickened, not reflected, obliquely receding in front, 

 internally with sharp, distant lirations; canal short, recurved. Alt. 25, 

 max. lat. 13 mm. 



Potrero, Eio Amiua, Santo Domingo, Eowell, in what are probably 

 Oligocene strata. No. 113762, U.S.N.M. This species is named in 

 honor of Rev. J. Eowell, an old collaborator of the Smithsonian Insti- 

 tution, and a pioneer of 1849 in California. It is x>erhai)s most nearly 



