30 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
shallow notch at each end, denticulate. Third to fifth perzopods, 
second joimt well expanded, oval, with free corner, fifth pereeopod 
subequal to fourth. Third uropod slightly longer than others, pe- 
Fic. 3.—MRA RATHBUNE. 441, FIRST ANTENNA; Qj, SECOND ANTENNA; Q;, FIRST GNATHOPOD OF MALE; 
J, SECOND GNATHOPOD OF MALE; mp, MAXILLIPED; mz, MAXILLA; p1, FIRST PERHOPOD OF MALE; 
D5, FIFTH PEROPOD; t, TELSON; U3, THIRD UROPOD. 
duncle short, rami equal, truncate. Telson cleft to base, a deep notch 
just outside the apex of each side from which a seta projects. 
Length, 18 mm. 
Distribution.—_Gulf Stream, off Key West, Florida, 98 fathoms, 
February 14, 1902, Station 7279, U. S. Bureau of Fisheries, steamer 
Fish Hawk; also 122 fathoms, February 26, 1902, Station 7296. 
Type.—Cat. No. 38341, U.S. N. M. 
Named for Miss Mary J. Rathbun. 
PROTELLOPSIS STEBBINGII, new species. 
Head, bearing two acute spines above. First segment of person 
longer than head, third segment with two blunt dorsal spines at 
middle, fourth segment with two slight dorsal elevations at center ; 
first four segments rugose above; second, third, and fourth bear 
large rugose lamelle at their anterior ventral angles; fifth segment 
longest; third longer than fourth, fourth longer than second, sixth 
much longer than seventh, fifth almost twice as long as sixth and 
seventh together. Eyes rounded or slightly oval. First antenne 
