HAUSTORIIDAE OF NEW ENGLAND — BOUSFIELD 173 



Gnathopods 1 and 2 slender, coxal plates distally broadest. Gnath- 

 opod 2: segment 6 short, tumid, thickly setose. Peraeopods 1 and 



2 slender fossorial, coxa of 2 very broad. Peraeopods 3-5: segments 

 4 and 5 little expanded, marginal spines elongate. Peraeopod 



3 about Yz peraeopod 5. Brood plate vestigial on peraeon 3. 

 Pleopods: rami 10-14 segmented, outer ramus slightly longer. Uro- 

 pods biramous. Uropod 1 strong; rami long, spinose, inter-ramal 

 spines large; uropod 2 small, peduncle short. Uropod 3 longer, 

 rami slender. Telson subquadrate, apically notched, sparsely spinose. 



Type species. — Protohaustorius dewhmannae, new species. 

 Additional species. — Protohaustorius wigleyi, new species. 



Protohaustorius deichmannae, new species 



Figures \h, 2c, Ak, 6, 7 



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

 beside west channel, sandy mud, low water, May 13, 1962, E. L. Mills, 

 E. Deichmann, E. L. Bousfield: 3 cf c?, 2 99, ov. (NMC 7032); sandy 

 bar opposite town wharf. May 13, 1962, E. L. Bousfield: 1 9, holotype, 



I cf , allotype (NMC 7030) ; same locality: 9 99, 6 ov., 18 cf cf , 1 imm. 

 (NMC 7031); near Nobska Point, sandy beach below low water, 

 Aug. 16, 1959, E. L. Mills: 1 imm. (NMC 7033). Woods Hole, 

 Mass., east end of Nobska Beach, low water, Aug 26, 1961, E. L. 

 Mills: 2 99, 1 ov. (NMC 7034); east side of Nobska Point, fine sand 

 at low water, July 28, 1962, E. L. Mills: 5 99, ov., 1 cf , 10 imm. 

 (NMC 7035). 



Cape Cod region, Nobska Beach, fine sand, low water, Sept. 1, 

 1963: many specimens; Nobscussett Beach, at breakwater, low 

 water, Sept. 9, 1963: 50+ specimens (MBL, author collections). 

 Northern New England, 1963: more than 1800 specimens obtained at 



II suitable stations from East Sandwich and Cape Cod Canal, north 

 to Prout's Neck, Saco Bay, Maine (NMC, author collections). 



Description. — Female, 4.0-6.0 mm. Head a little longer than 

 wide, eyes slit shaped, weakly pigmented, remote from shallow 

 antennal sinus. Antenna 1 : peduncular segment 2 subcylindrical, 

 short; flagellum 5-segmented. Antenna 2: peduncular segment 4 

 medially broadest; flagellum 4-segmented, 1st segment much broader. 



Upper lip: apex smooth. Lower lip: inner lobes apically rounded. 

 Mandible with 3 accessory blades; terminal segment of palp with 4 

 comb spines and about 10 slender apical spines. Maxilla 1: inner 

 plate with 5 marginal setae. Maxilla 2 : outer plate with 10 pectinate 

 and 2 plumose inner marginal setae. Maxilliped palp: segment 3 

 short clavate. 



