362 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Order OPISTHOBRANCHIATA. 
Suborder TEOTIBKAN CHI AT A. 
(Oephalaspidea). 
Family ACTbEONIDAi. 
Genus ACTION Montfort, 1810. 
Shell oval, spirally striate, with conical spire and channeled suture. Aperture long, narrow 
above, broadly rounded below; outer lip simple and acute; columella twisted into a strong spiral fold. 
Parietal wall without folds or teeth. 
Type, A. tornalilis Linnaeus. 
Actseon punctostriatus 0. P>. Adams. 
Tnrnatdla ; punctostriata C. B. Adams, Boston Journ. Nat. Hist., in, p. 323, pi. in, fig. 9, 1810. 
Shell small, elliptical; whorls about 4, the last showing revolving, punctate stria; on its basal 
half; the central part of the whorl is smooth, and there are sometimes a few subsutural lines; nucleus 
somewhat depressed, suture deep, bordered externally by revolving grooves, which show through on 
the inner side of the outer lip. There is a good deal of variation in the color, being sometimes variegated, 
nebulously banded, or white. 
Length, 3 to 6 mm. 
Mayaguez, Porto Rico, eight dead specimens. 
Family RINGICUUD.C 
Genus RINGICULA Deshayes, 1838. 
Shell small, solid, nearly white, ovate globose with conical spire; aperture conspicuously notched 
and channeled at base; outer lip thickened, often dentate within, callous outside; columellar margin 
callous, with two to four strong entering folds. 
Type, R. ringens Lamarck. 
Ring-icula semistriata d’Orbigny. Plate 57, fig. 11. 
Ringicula semistriata d’Orbigny, Moll. Cubana, ii, p. 103, pi. xxi. figs. 17-19, 1845. 
Shell ovate-conic, solid, whitish, smooth above and having revolving strife below; suture impressed, 
columella strongly biplicate, and there is a callous tooth on the parietal wall; outer lip greatly thickened, 
subtuberculate in the middle. 
Height, 2; diameter, 1 mm. 
Mayaguez, Porto Rico, two dead shells. 
Family TORNATINID.E. 
Genus TORNATINA A. Adams, 1850. 
Shell cylindrical, with a conic or flattened spire, the apex projecting and mammillar, sinistra], tilted 
so that its axis lies at an angle of about 90 degrees with that of the shell. Suture channeled; aperture 
long, narrow above, dilated and rounded below; outer lip arched forward, retreating at the suture and 
base, columella with one spiral fold at its junction with the whorl. 
Type, T. voluta Quo}' & Gaimard. 
Tornatina bullata Kiener. Plate 57, fig. 9. 
Tornatetta bullata Kiener, Sp. et Icon. Coq. Viv., p. 5, pi. I, fig. 4. 
Shell cylindrical, rather solid, white; suture deeply channeled; body whorl having very minute, 
wavy, revolving sculpture; aperture long and narrow; outer lip advanced in the middle; columellar 
plication rather strong. 
Length, 7 ; diameter, 3 mm. 
Mayaguez, Porto Rico, one shell; Vieques, a single badly worn specimen. Both seem to be fully 
adult, but are probably a small variety. The revolving sculpture is distinct on the best preserved 
specimen. 
