188 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



Pleopod rami (especially outer) basally broadest; inner ramus with 

 12 distinct segments, outer with 15. 



Uropod 1 : peduncle stout, longer than rami, upper margin distally 

 spinose; outer ramus with two groups of posterior spines and terminal 

 spine group; inner ramus much shorter (sometimes lacking) with 

 posterior setae and termmal spines. Uropod 2 : ramus slender, nar- 

 rowly spatulate, setose, longer than weakly setose peduncle. Uropod 

 3: outer ramus 2-segmented, each distally with setae and spmes; inner 

 ramus shorter, with terminal spines and setae; peduncle very short. 

 Telson short, subrectangular, entire, posterior margin with 3 spines 

 on each side. 



Male: Unknown. 



Remarks. — The inner ramus of uropod 1 was not present in two 

 females of the Herring Brook material, a phenomenon that lessens the 

 significance of the presence or absence of uropod rami as generic 

 characters. The species is known only from short sandy estuaries 

 of the western shore of Buzzards Bay, where it burrows often in 

 company with Haustorius canadensis in sandy banks and bars, from 

 low water to about midtide level. 



Neohaustorius schmitzi, new species 



Figures It, 2d, 4j, 18, 19 



Material examined.— Morehead City, N.C., Shark Shoal, under 

 algae ash on sandy beach, E. H. Schmitz, Sta. SSB-1, June 15, 1959: 

 19, holotype. Id', allotype (NMC 7026). Chatham, Mass., along 

 sandy shore, 2-3 ft., Aug. 26, 1956, R. L. Wigley: 2cfcf, 2 99, 1 ov. 

 (NMC 2027). Cape Cod region, Nobscusset Beach, open sand shore at 

 low water, Sept. 9, 1963: 2 adult, 2 imm. (MBL, author collections). 



Description.— Female, 4.2-5.3 mm. Head short and wide, rostrum 

 broad acuminate, not exceeding anterolateral angles; inferior antennal 

 sinus shallow. Eyes apparently lacking. Lateral lobes of peraeon 

 long, widely separated, coxae shallow. Urosome lappet short. 

 Antenna 1: peduncular segments sublinear, sparsely setose; flagellum 

 6-segmented, shorter than peduncle; calceoli elongate; accessory 

 flagellar segments subequal. Antenna 2 : posterior lobe of peduncular 

 segment 4 narrow, not wider than segment proper, flagellum 4- 

 segmented, 1 longer than 2 and 3 combined. 



Upper lip rounded and minutely pilose apically. Lower Up: outer 

 lobes thickly pilose; inner lobes very long and slender. Mandible: 

 lacinia short, conical, 3 slender accessory blades; palp short, termmal 

 segment longer and more slender than 2nd, 6 comb spines, about 10 

 slender terminal spines. Maxilla 1: inner plate narrow, with 7 bi- 

 furcate margmal setae; outer plate with 9 apical spine teeth; palp 



