‘ 7 
- PROCEEDINGS OF THE NATIONAL MUSEUM. 237 
Florida: 
St. Augustine, J. G. Hewitt (2018); Southern Florida, Silas Stearns (3147); Flor- 
ida Reefs, Lieut. J. F. Moser, U. 8S. Navy, U. 8. C. S. S. Bache (14998); 4 
miles east of Cape Romano, 18 feet, Lieut. J. F. Moser (13059); Marco, H. 
Hemphill (15122); Charlotte Harbor, U. 8. Fish Commission (15203); W. 
H. Dall (15125); Sarasota Bay, H. Hemphill (15124), (Union College Coll.),” 
- ‘This species is found as far north as Casco Bay. 
Libinia dubia Milne Edwards. 
Plate xxx1, fig. 1. 
Libinia dubia Milne Edwards, Hist. Nat. des Crust., 1, p. 300, pl. 14 bis, fig. 2, 1854. 
Gibbes, op. cit., p. 169. Streets, op. cit., p. 104. Smith, loc. cit. A. Milne Ed- 
wards, op. cit., p. 129, pl. xvul, fig. 5. Kingsley, op. cit., p. 316, 1878; Xxx1, 
p. 386, 1879. R. Rathbun, op. cit., p. 778, pl. 269, fig. 5, 1884. Miers, loc. cit. 
Kendall, loc. cit. Ives, Proc. Acad. Nat. Sci. Phila., p. 178, 1891. Aurivillius, 
K. Sv. Vet.-Akad. Hand., Bd. 23, 1, p. 53, 1889. 
Libinia canaliculata De Kay, loc. cit. (partim). 
LTibinia distincta Guérin, La Sagra’s Hist. of Cuba, vu, p. xm, 1856. Capello, Jor. 
Sci. Lisbon, 111, p. 263, pl. 3, fig. 2, 1871. Martens, Archiv. fiir Natur., xxxvu1, 
p. 79, pl. rv, figs. la, 1b, 1872. 
Libinia rhomboidea Streets, op. cit., p.106. A. Milne Edwards, op. cit., p.131. Miers, 
loc. cit. 
? Libinia inflata Streets, loc. cit. 
Among five specimens from near Cedar Keys, Fla., there is one in 
| which the upper orbital fissures are open as in the species of the second 
section of Libinia enumerated by Miers, op. cit., p.73... The lower mar- 
| gin of one orbit has a very narrow open fissure; in the other orbit, how- 
ever, the fissure is closed, as in typical specimens. 
_A specimen from Merida, Yucatan, presents most of the characters of 
Streets’s rhomboidea. A. Milne Edwards is probably right in considering 
| this a variety of dubia. The specimen has the depressed median spines ; 
the irregular transverse row on the gastric region; the strong spine on 
the hepatic region, forming with the lateral spines almost a semicircle; 
and the four strong spines arranged in a rhomboid on the branchial 
region, a character possessed by many of our specimens of dubia. On 
one side there is an additional smaller spine placed a little in front of 
the posterior spine of the rhomboid and nearer the median line. The 
preocular spine is prominent. The rostral spines are slightly divergent 
as in the typical dubia, from which this specimen does not differ essen- 
tially except in the strong hepatic spine. 
This species is not uncommonly covered with foreign matter, such 
as worm tubes, oysters, hydroids, and alge. A female from Barnegat, 
N. J., about 3 inches long, is encrusted with tubes of Serpula, which 
conceal the carapace with the exception of the posterior margin, the 
intestinal spine,and the orbits, rendering the identification doubtful. 
The rostrum is broken. The mass of tubes is about 3 inches high and 
of greater width. Another female from Great South Bay, Long Island, 
has an oyster growing vertically on the frontal region, the hinge being 
