382 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
deflected at the aperture and bluntly carinated, the last two having faint, brown strigations and some- 
times subobsolete, revolving bands on a lighter ground; aperture oblique; lip slightly reflexed, white; 
columella heavy, entering deeply, sometimes feebly toothed. 
Height, 15; greater diameter, 25; lesser, 20 mm. 
San Juan; near Caguas, Porto Rico. 
Pilsbry makes this a variety of P. lima, while Crosse considers it a valid species. It seems to 
stand about midway between lima and incerta, and might as well or better be called a variety of the 
latter. P. incerta is decidedly granular throughout, has a narrow, dark peripheral band, and is 
generally higher and less carinate than P. castrensis. P. lima does not have revolving strise and ip 
usually less elevated than castrensis. 
Pleurodonte incerta Ferussac. 
Helix incerta FcSrussac, Hist. Nat. Moll. Terr., pi. cv, fig. 2, 1832. 
Helix incerta Pilsbry, Manual, v, p. 57, pi. I, figs. 1, 2; pi. iv, figs. 36, 37, 1889. 
Not in Crosse’s list, but reported from Porto Rico on the authority of Pilsbry. 
Superorder STREPTONEURA. 
Order CTENOBRANCHIATA. 
Suborder 0RTH0D0NTA. 
Superfamily TOXOGLOSSA. 
Family TEREBRIILE. 
Genus TEREBRA Bruguiere 1789. 
Shell elongated, solid, many-whorled; whorls generally flattened; suture shallow; aperture small, 
notched below; columella without plaits above. 
Type T. subulatci Linnaeus. 
Section HASTTJLA H. & A. Adams, 1857. 
Terebra cinerea Born. 
Buccinum cinereum Born, Test. Mus. Vinci., p. 267, pi. x, figs. 11,12, 1780. 
An abundant, widespread species, which is quite variable and has received many names. It is 
found generally throughout the Inclo-Pacific region, the West Coast of Africa, and the West Indies. A 
single worn specimen was collected by the Fish Hawk expedition at Aguadilla, Porto Rico. 
Terebra hastata Gmelin. 
Buccinum hastatum Gmelin, Syst. Nat., p. 3502, 1792; Tryon, Manual, vn, p. 34, pi. X, fig. 87, 1885. 
Porto Rico (Gundlach); West Indies generally. 
Section ACUS H. & A. Adams, 1857. 
Terebra protexta Conrad. 
Terebra protexta Conrad, Proc. Acad. Nat. Sci. Phila., m, p. 26, 1843; Tryon, Manual, vxi, p. 25, pi. vi, fig. 98, 1885. 
Whorls about fifteen, somewhat rounded, having about eighteen rather sharp, curved ribs, 
which are made slightly nodulous by numerous revolving lirse; sutural band obscure or wanting; apex 
smooth for the first two whorls; columella twisted; canal thrown backward; outer lip simple. 
Color, brownish or purple brown. 
Length, 18 to 20 mm. 
Mayaguez Harbor, several young shells; also southern and southeastern United States. 
Terebra juanica, n. sp. Plate 57, fig. 5. 
Shell minute, slender, acute, with a minute subglobular apex, brilliantly polished, purplish 
brown with a paler presutural band. Whorls nine, with two additional nepionic turns, which are 
