178 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



equal, elongate, rami slender. Uropod 3 : terminal segment of outer 

 ramus long. Telson broad, apically incised, marginal spines slender, 

 clustered laterally. 



Type species. — Protohaustorius longimerus, new species. 



Additional species. — P. holmesi, new species, P. attenuatus, new 

 species. 



ParahaustoHus longimerus, new species 



FiGUBES 1/, 3a, 4d, 10, 11 



Material examined. — Cape Cod, Mass., Barnstable Harbor, end 

 of Beach Point, sand flat at low water, Aug. 31, 1959, E. L. Mills: 

 1 cf, holotype (NMC 7071); Beach Point, coarse sand, low water, 

 12°C., May 19, 1962, E. L. Mills: 2 99, ov., 6 cf cf , 3 imm., paratypes 

 (NMC 7072) ; near Nobska Point, sandy beach below low water, 

 Aug. 16, 1959, E. L. Mills: 13 c? cf , 4 99, ov., 16 imm. (NMC 7073). 

 Woods Hole, Mass., east end of Nobska Beach, fine sand at low water, 

 Aug. 26, 1961, E. L. Mills: 30 specimens, imm. (NMC 7074); east 

 side of Nobska Point, fine sand at low water, July 28, 1962, E. L. 

 Mills; 1 9, ov., 2 imm. (NMC 7075). Albatross-101, coll. 15, 41°38', 

 67°57', Digby bag, 11 fms., Dec. 9, 1955: 1 9, ov. (NMC 7076). 

 Smith's Island, Va., Ocean Beach, low-water zone, July 5, 1935, 

 J. P. E. Morrison: 11 imm. specimens (USNM ace. 135197); same 

 locality, 100 yds. north of southern tip of Ocean Beach, July 6, 1935, 

 J. P. E. Morrison: 11 imm.; same locality, 200 yds. north of south 

 tip of Ocean Beach, July 6, 1935, J. P. E. Morrison: 1 imm. 



Nobska Beach, east end, fine sand, low water, Sept. 1, 1963: many 

 specimens; Nobscusset Beach, at brealcwater, sand at low water, 

 Sept. 9, 1963: 100+ specimens; Naragansett Beach at mouth of 

 Pattaquamsett Inlet, R.L, surf sand, low water, Sept. 23, 1963: 

 6 imm. (MBL, author collections). 



Albatross-Q9, coll. 1, 40°52^ 69°59', Nov. 15, 1955: 37 adults; 

 Albatross-70, coll. 15, 41°38', 67°57', Digby bag, Dec. 9, 1955: 4 

 adults; Albatross-101, sta. 68, 41°06', 68°00', Smith grab, Aug. 24, 

 1957: 5 adults (USFW, R. L. Wigley collections). 



Description. — Male, 9.5 mm. Head width about twice the length, 

 rostrum broad, blunt conical; eyes small, ellipsoid, weakly pigmented, 

 persisting in adult stage. Antenna 1: flagellum of 9 subequal seg- 

 ments, calceoli slender, Iji times length of each segment; accessory 

 segments slender, subequal. Antenna 2: anterior marginal setae of 

 peduncular segment 4 short, surface sensory setae few and small; 

 flageUum of 9-10 smaU segments, shortest proximally and bearing 

 posterior plumose setae. 



