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Macroceeloma trispinosa (Latreille). 
Pisa trispinosa (Latreille, Eneycl. Méth. Hist. Nat., x, p. 142, 1825). 
Pericera trispinosa Guérin, Icon. des Crust., pl. 8, fig. 3. Milne Edwards, Hist. Nat. 
des Crust., 1, p. 336, 1834. Saussure, Mém. Soc. Phys. de Geneve, XIv, p. 426, 
1857. Martens, Archiv. fiir Natur., xxxvul, p. 84, pl. Iv, figs. 4a, 4b, 1872. A.M. 
Edwards, Miss. Sci. au Mexique, pt. 5, I, p. 52, pl. Xv, fig. 2, 1873, and synonymy ; 
Bull. Mus. Comp. Zool., vim, p. 1, 1880. Aurivillius, K. Sy. Vet.-Akad. Hand., 
Bd. 23, 1, p. 55, pl. 2, fig. 2, 1889. Ives, Proc. Acad. Nat. Sci. Phila., p. 178, 
1891. 
Macroceloma trispinosa Miers, Jour. Linn. Soe. London, Xtv, p. 665, 1879; Challenger 
Rept., Zool., xvu, pp. 79, 80, 1886. 
In most of our specimens of this variable species the rostral horns 
are parallel and deflexed for two-thirds of their length, and then become 
divergent and upturned. In an individual from Fernando de Noronha, 
the four lobes at the summit of the carapace are very distinct and 
defined by deep depressiorts. 
RECORD OF SPECIMENS EXAMINED. 
Off North Carolina, U. 8. Fish Comm., 1885: 
Lat 33° 42’ 45” N., long. 77° 31’ W., 17 fath., sand, pebbles, sta. 2616 (16178). 
Lat. 33° 37/ 15’ N., long. 77° 35’ 30’ W., 17 fath., coarse yellow sand, broken 
shells, sta. 2618 (16179). 
Florida: 
Key West, on rocks, low tide; H. Hemphill, 1885 (9279), (Union College Coll.). 
Eastern Dry Rocks; Dr. E. Palmer, 1884 (9280). Dry Tortugas; Dr. E. 
Palmer, 1884 (14004). Cedar Keys; Lieut. J. F. Moser, U.S.N., U.S.C.S.S. 
Bache, 1887 (15137). Pensacola; Silas Stearns (4497). 
Gulf of Mexico; U. 8. Fish Comm., 1885: 
Lat. 26° N., long. 82° 57’ 30” W., 24 fath., fine sand, black specks, broken shells, 
station 2413 (15136). 
Lat. 27° 04’ N., long. 83° 21’ 15’ W., 26 fath., coarse gray sand, broken shells, 
station 2409 (16055). 
Jamaica, T. H. Morgan, 1891. 
St. Thomas; U.S. Fish Comm., 1884 (16180). 
Curagao; U. 8. Fish Comm., 1884 (16181). 
Brazil; R. Rathbun, Hartt Explorations, 1875-1877: 
Fernando de Noronha, 
Bay of Bahia, 3 to 4 fathoms. 
Found also in the Bermudas. 
Macroceloma camptocera (Stimpson). 
Plate xxx1ul, fig. 2. 
Pericera camptocera Stimpson, Bull. Mus. Comp. Zool., u, p. 112, 1870. A.M. Ed- 
wards, Miss. Sci. au Mexique, pt. 5, 1, p. 57, 1873. 
Macroceloma camptocera Miers, Challenger Rept., Zool., xvur, pp. 79, 80, 1886. 
This species is distinct from trispinosa, as in a series from eight 
localities most of the differences pointed out by Stimpson hold good. 
The rostrum, however, though usually longer than in the specimens of 
trispinosa examined, varies in length, being from more than one-half to 
less than one-third the length of the post-frontal portion of the carapace. 
