412 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Coralliophila abbreviata Lamarck. 
Pyrula abbreviata Lamarck, Enc. M6th. pi. ccccxxxv, fig. 2 a-b, 1795; An. sans. Vert., vn, p. 146, 1822. 
Shell solid, variable in form and sculpture, generally with a ridge on the upper whorls, which 
may be somewhat sharp or rounded, and which makes the body whorl shouldered, with or without 
low longitudinal ribs; spire generally rather short; surface sculptured with line, rather sharp, 
sometimes scaly revolving ribs; outer lip somewhat lirate within; canal short. There is generally a 
decided umbilicus, having a sharp ridge to the left of it. Color whitish, flesh color, or yellowish, the 
interior often purple. 
Length, 30; diameter, 22 mm. 
Mayaguez; I Maya de Ponce, Porto Rico; Vieques, young and worn shells. 
This species is widely distributed in warm seas. The young shells are generally more attenuated, 
sharper keeled, and more strongly ribbed than adult specimens. It is commonly known under the 
name of Coralliophila galea. 
Superfamily STREPTODONTA. 
Family SCALID.E. 
Genus SCALA (Humphrey, 1797) Auct. 
Shell turriculated, rather solid, shining, generally more or less umbilicated; spire elongated; 
whorls numerous, rounded, in contact or partially separated, with numerous longitudinal varices; 
aperture circular; peristome entire reflected; operculum horny, spiral, its nucleus nearly central. 
Scala angulata Say. 
Scala clathrus var. angulata Say, Am. Conch., in,pl.xxvn,1831. 
Shell white, shining, with from six to. eleven whorls, which approach each other very closely, 
but touch only by the varical ribs, which number nine to eleven, slightly recurved, simple, slightly 
angulated above near the suture; aperture elliptic; base a little angular. 
Length, 15 to 20; diameter, 6 to 8 mm. 
Arroyo, Porto Rico, one young shell; Ensenada Honda, Culebra. 
Scala turricula Sowerby. 
Scalaria turricula Sowerby, Thes. Conch., No. 37, fig. 62, L847. 
Shell rather slender, with the whorls scarcely touching, slightly umbilicated, covered with very 
fine spiral striations, with twelve or thirteen ribs to each whorl; part of ribs thin, others thicker, some 
rounded above, others shouldered or hooked; surface dull, with faint brownish tints. 
Length, 18; diameter, 8 mm. 
Mayaguez, one young shell. 
Scala unifasciata Sowerby. 
Scalaria unifasciata Sowerby, Thes. Conch., i, pi. xxxm, fig. 68, 1847. 
Quebradillas, Porto Rico (Gundlach). 
Scala eulita, n. sjo. Plate 57, fig. 2. 
Shell small, very slender, white, polished, with nine whorls, nepionic part three-whorled, com- 
pact, white, without varices; subsequent whorls convex, smooth, with (on the ninth) about fifteen 
varices, which are very thin, sharp, and when perfect show a small angle near the suture; whorls 
adjacent, with no basal cord or disk. 
Length, 4; maximum diameter, 1.2 mm. 
Mayaguez Harbor, Porto Rico, one specimen. 
The shell is remarkable for its acicular form and small size. The specimen is somewhat defec- 
tive, and the figure hardly shows the little angular projection near the suture, which is normal to the 
varices. 
Subgenus Achilla Adams, 1860. 
Surface reticulated; shell thin. 
