1910.] ' NATURAL SCIENCES OF PHILADELPHIA. 361 



jecting from below the tip of the aciculuni. Neuropodial setie (P . 

 XXX, figs. 37 and 38) moie numerous, arranged in three supra-acicular 

 and six or seven subacicular series. All much longer than the notopo- 

 dials but averaging only about one-third their diameter; the shafts 

 long and distal enlargements inconspicuous, slightly curved and tapered 

 to long, prominent but not especially slender smooth tips, below which 

 are narrow pectinations which become longer and more promuient 

 distad. Setae ofj the two dorsal rows j^( fig. 37") are especially 

 slender, with the little enlarged pectinated regions taking up about 

 half of the exposed portion and bearing thirty-five or more pairs of 

 pectmse. Those of middle rows (fig. S7'') are stouter and bear about 

 thirty pairs of pectinae of which the basal ones are. mere striations. 

 the smooth tips being especially elongated. Seta> of the ventrahnost 

 row (fig. 37^^) have much shorter distal regions with fewer pectins and 

 very acute tips. Posteriorly all sette become longer and more slender. 



Except for a slight duskiness in places pigment appears to be wanthig 

 but the cuticle exhibits a purpli;5h iridescence. 



In the character of its setse this species departs somewhat from the 

 typical condition and approaches Eunoe. 



.Stations 4,381, off North Coronado Island, vicinity of San Diego, 

 618-667 fathonxs, green mud; 4,517, Monterey Bay, off Point Pinos 

 Light, 750-766 fathoms, green mud and sand (type and cotype). 



' Gattyana senta Moore. 



(Jattiiana senta Moore, Proc. Acad. Nat. Sci. Phila., 1902, pp. 259-263 

 Pi. XIII, figs. 1-13. 



One specimen occure in the collection from each of four stations antl 

 two from a fifth. Most of the very characteristic and remarkably 

 protected elytra are in place; often they are blotched with brown; 

 the marginal spines of posterior elytra have extremely long acute 

 prongs. As Treadwell states the nei)hridial papilla begin on VI but 

 the anterior ones are very small. 



A medium-sized example has the proboscis protruded. It measvu-es 

 4.5 mm. long, 3.6 mm. deep at the middle and 2.4 mm. wide at the 

 end, being truncate subfusiform in shape, compressed at the l)a--e, 

 depressed at the aperture; Apert\u'al papilke nine above and nine 

 below, rather long, })lunt at the end. Jaws pale brown, of the usual 

 for.n, wit.i fang and cutting plate, the ventral somewhat larger and 

 biting to right of upper. 



Stations 4,361, Point Loma Light, vicinity of San Diego, 91-97 

 fathoms, gray sand, mud and rock; 4,377, same, 127-299 fathoms, 

 green mud and sand: 4.420. off Sail Nicolas Islainl 32-33 fathoms. 



