168 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



stems ; tbc pinnate portion is broad-ovate, longer than tlie stems, with 

 about four to six long, slender pinnae on each side. The setiB are very 

 numerous and compUcated. Those of the dorsal fascicle are long, slen- 

 der, capillary, mostly curved inward over the back. In the lower fas- 

 cicles there are several kinds: the upper (a) are two to four simple 

 ones, with long, tapering, strongly' spinulated, very acute tips ; the next 

 (b) are several compound setai, with the shaft stouter and strongly ser- 

 rulated near the end, while the terminal piece, of variable length, is 

 composed of many joints, and is minutely bifid at the tip ; the next {c) 

 are about six to eight stout, comi)ound setae, arising both above and 

 below the supporting aciculse, and having their shafts minutely and 

 closely circularly serrulate tow^ard the end, and with a short, stout, 

 tapering, undivided, terminal piece, which has a hooked, claw-like tip, 

 with a shariJ secondary jirocess opi^osed to it; below these are {d) 

 numerous long, slender, compound setae, with shafts scarcely or not at 

 all serrulate, and with the subdivided terminal piece minutely bifid at the 

 tij), varying in length and number of joints, the middle ones being com- 

 paratively stout, with the terminal piece tapering and not very slendei', 

 while the Iowtt ones are very slender and capillary, with a very long, 

 tapering, terminal piece, of many joints. Color nearly white or i)ale 

 flesh-color. Length of largest, SO"^"^ to 100""". 



Vineyard Sound and off Is^antucket Island, Mass., 10 to 20 fathoms, 

 clean silicious sand, 1875. Shores of Caiie Cod Bay, in sand, at low- 

 water, at Barnstable (A. E. V.), and Provincetown (H. E. Webster). 



This elegant species is allied to S. Buslcii M'Intosh, and has similar 

 appendages to the scales. In our species, however, the pinnate pro- 

 cesses are less crowded and have longe^' stems and fewer and longer 

 pinnae. 



Lcetmatouice armata, sp. uov. 



L(vtinaioHice filicornin Vcrrill, formerly, iu Amer. Jour. Scicuce {non Kiuberg). 



Body stout, depressed, broadest in the middle, tapered shghtly toward 

 both ends, the posterior most obtuse. Back covered with large, thin, 

 white, smooth scales, usually more or less concealed by a felt- like coat- 

 ing, to which mud and dirt adhere. Low er surface grauulous. Head 

 small, but prominent, with two minute, rounded, tubercle-Uke antennae in 

 front and a median antenna arising between them, which has a stout, 

 tapering base, but becomes very slender for most of its length; it is 

 much shorter than in L. Jilicornis, its tip not reaching to the basal third 

 of the palpi. The latter ai-e large and long, regularl;^' tapered to the 

 end, three to four times as long as the median antenna and foiu" or five 

 times as thick. The first parai)odia bear two slender cirri on the ui)per 

 ramus, which are about as large as the median antenna. The scales are 

 large, smooth, and translucent, without appendages, mostly broadly 

 rounded on the inner and posterior edges, and deeply emarginate on 

 the outer attached border. The upper ram i of the parapodia bear, besides 



