254 CRABS OF THE FAMILY PERICERIDAZ—RATHBUN. 
Key Vaceas (14070), Nights Key (15112), No Name Key (15111), Big Pine Key 
(15113); H. Hemphill. Harbor Key (Union College Coll.). Key West Har- 
bor; Dr. E. Palmer, 1884 (15115). Key West; D.S. Jordan, 1888 (5749); H. 
Hemphill (9354) ; U. S. Fish Commission (11390), (Union College Coll.). Plan- 
tation Key (Union College Coll.). Dry Tortugas reefs, from corals and 
sponges; Dr. E. Palmer, 1884 (9362). Garden Key, Tortugas (15825). 
Marco; H. Hemphill (16056), Bird Key; U. 8. Fish Commission, 1889 (15207). 
Jermudas : 
Tuckers Island; Dr. George Hawes (13796). Dr. F. V. Hamlin, Wesleyan Uni- 
versity (4024). 
Bahamas: Andros Island (Stearns Coll.); New Providence, U. 8. Fish Commission, 
1886 (11369). 
Jamaica; T. H. Morgan, 1891. 
West Indies, U. 8. Fish Commission: 
Jamaica (16057); St. Thomas (16186); Cnragao (7580); Old Providence (16185) ; 
near Aspinwall, lat. 9° 32’ N., long. 79° 54’ 30” W., 34 fathoms, broken shells, 
sta. 2146 (16187). 
Barbados; U. 8. Eclipse Expedition to West Africa, 1890 (14883). 
Sabanilla, U. S. of Colombia; U. 8S. Fish Commission, 1884 (16058). 
Brazil; R. Rathbun, Hartt Explorations, 1875-1877; Pernambuco; Rio Formoso, 
Pernambuco; Plataforma, Bahia, in tide pools; Fernando de Noronha, 
Microphrys, sp. 
Carapace broadly triangulate. Regions well defined, tuberculous. 
There is one sharp spine at the lateral angle of the carapace; a little 
nearer the median line are two spiny tubercles. Anterior portion of 
branchial region much swollen in an oblong tuberculous lobe. There 
are small tubercles on the margin of the hepatic region and on the sub- 
branchial region. 
Rostrum depressed, short, reaching to the middle of the third joimt 
of antenne. Horns narrowly triangular, acute, separated by a narrow 
V-shaped notch. Preeocular angle distinct. 
Basal antennal joint with two marginal teeth separated by a narrow 
sinus; the anterior tooth long, flat, procurved, subacute. 
Chelipeds in young female weak, not much longer than first pair of 
ambulatory legs. Merus with four tubercles on upper margin; carpus 
tuberculous on outer surface; margins of hand subparallel; fingers 
evenly dentate, gaping at base. 
Ambulatory legs with meral joints spinous above and tuberculous on 
outer face; carpal joints with one spine above; propodal joints with a 
broad, rounded, lamelliform process for the articulation of the dactyl, 
as in platysoma. 
Length, including rostrum, 12 millimeters; width, without spines, 9 
millimeters. S 
Gulf of California, lat. 25° 16’ N., long. 111° 54’ W., 22 fathoms, fine 
gray sand, temperature 63°, station 3012, U. S. Fish Commission, 1889 
(16774). 
This species appears to be nearest to bicornutus. The species de- 
scribed from the Pacific coast are so numerous and the literature so inad- 
