138 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Genus POLYONYX. 
Polyonyx macrocheles Stimpson. 
Porcellana macrocheles Gibbes, Proc. Amer. Assoc. Adv. of Sci., in, p. 191, 1850. 
1‘nljjonyx macrocheles Stimpson, Proc. Ac. Nat. Sci. Phila., x, p. 229, 1858. Kingsley, Proc. Ac. Nat. Sci. Phila., xxxi, p, 408, 1879. 
The carapace is ovate and is much wider than long. The orbits are very shallow; the eyes 
are small; the front is so little produced that it does not interfere with the ovoid outline. The 
chelipeds are long and slender. The inner margin of the carpus is produced and entire. The hand 
has a fringe of long hair on its lower border. “The dactyls of the ambulatory feet are short, wide, 
and hi- or multi-ungulate.” 
This crab is found in the tubes of Chsetopterus, on the southeastern coast of the United States and 
in the Gulf of Mexico, and may yet be taken in the West Indies. 
Genus EUCERAMUS. 
Euceramus prselongus Stimpson. Plate 3, fig. 12. 
Euceramus prselongus Stimpson, American Jour. Sci. and Arts, n,xxix,p. 445. Kingsley, Proc. Acad. Nat. Sci. Pliila., p. 408, 
pi. xiv, fig. 4, 1879. 
This is a small, elongated porcellanid, with a semicylindrical carapace. The front is tridentate; 
the teeth are sharp, the middle one twice as long as the lateral. The carapace is crossed by minute 
rugae; its length is twice the width. The chelipeds are elongated; the palms of the hands are covered 
with bristles; the ambulatory feet are stout, the fourth pair is the longest. 
The figure is from a Union College specimen identified by Mr. Kingsley. 
Genus HIPPA. 
Hippa cubensis (Saussure). 
Hippa scutellata Fabr., Ent. Syst., n, p. 474, 1793. 
Remipes cubensis Sausstire, Rev. et Mag. Zool. (2), ix,1857. 
Remipes barbadensis Stimpson, Ann. Lyc. Nat. Hist, of N. Y.,x, p. 120, 1871. 
Remipes scutellatus of authors. 
Hippa cubensis, M. J. Rathbun. Proc. U. S. Nat. Mus., xxn, p. 300. 
Front trilobate. Antennuhe naked with the exception of a fringe of short cilia on the lower margin 
of the flagella, which is less than half the length of the carapace. The eye-stalks and antenme are 
short. The carapace is depressed, broadest in the middle, tapering much more toward the head than 
posteriorly. It is bordered on the sides and front with short oblique lines of bristles, which rise from 
tlie bottom of grooves such as would be formed by overlapping scales. The bristles are directed 
forward. The border formed by these lines is broadest at about the posterior third carapace. 
Length of specimen, 15 to 25 mm. 
Porto Rico; at Ponce, Hucares, Mayaguez, Boqueron Bay. West India regions generally, and the 
west coast of Africa. 
Genus EMERITA. 
Emerita talpoida (Say). 
Hippa talpoida Say, Journ. Acad. Nat. Sci. Phila., i, p. 160, 1817. 
Hippa talpoida of American authors, II. emerita in part of others. For synonymy see Miers’s Revision of the Hippidea, in 
the Journ. Linn. Soe. Loud., xiv, p. 323, 1879. 
Miss Rathbun 1 has shown that Remipes is a synonym of Hippo, and that the type of Hippa is the 
ITippa adactyla Fabr .=Remipes testudinarius Latreille. This makes it necessary to survey other bound- 
aries and to search for another name for the bereft little decapod so common in the shifting sands 
of our more southern shores. Gronovius in 1763 figured and described both the Hippa emerita and 
the Remipes scutellatus of authors under the generic name Emerita. After this Scopoli gave the same 
name to a chelate decapod and referred to figures of Swammerdamm which are intended to represent 
Pagurus bemhardus. If we ignore Emerita, Gron. 2 for the “sand bugs,” it would seem that we must 
recognize Emerita Scopoli for the “hermits” now in the genus Pagurus, and so add to the confusion. 
Although the names of Gronovius have not been universally used, I see no good reason why Emerita 
should not stand. 
2 Scopoli, Intro, ad Hist. Nat., p, 405, 1777. 
1 Proc. U. S. Nat. Mils., xxii, p. 301, 1900. 
