68 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. 60. 



small distorted mass at the anterior end of and free from the test 

 after producing young; venter of abdominal segments more heavily 

 chitinized; antennae, 7-8-seginented, the third usually somewhat 

 the longest; legs rather slender, claw stout, without denticle; tarsal 

 digitules slender, long, with stout knob, claw digitules large and 

 broad, with large knob; spiracles short and stout, strongly con- 

 stricted; mentum stout, short triangular, 2-segmented; body dor- 

 sally with fairly numerous, but scattered, large, stout, conical spines, 

 invaginated their whole length within the body, arranged in indefi- 

 nite transverse rows and more numerous near the margin; body 

 along margin wnth a single to triple row of slender, very acutely 

 pointed spines ; spiracular spines represented by a single one, about 

 twice as long as the marginal, slender, but stouter near the tip than 

 the marginal, and bluntly rounded at apex, opposite each spiracle; 

 ventrally with pairs of long hairs on the segments anterior to the 

 anal ring; dorsally with numerous 8-shaped pores, these clustered 

 in indefinite fashion around the large conical invaginated spines, 

 with a few small circular pores, and with numerous slender tubular 

 ducts with deep, cup-shaped bottoms, and slender prolongations 

 scattered promiscuously; ventrally with similar ducts, with trans- 

 verse rows of larger muitilocular-disk pores, and, finally, with some 

 small tubular ducts, the disk pores with about eleven loculi placed 

 anterior to the anal ring; those, about half as large, with five or six 

 loculi, scattered between each spiracle and its marginal spine, each 

 rov7 of these terminating in a dense cluster at the base of the spine : 

 anal ring small and stout, with pores and six setae, surrounded by a 

 pair of curved plates, flat, short, and deej) — that is, long dorso- ven- 

 trally, somewhat pitted above, each bearing four setae, and one 

 ventral ridge seta ; a single fringe seta on each side. 



Intermediate stages. — Not available for examination. 



Larva. — Elongate oval, somewhat broader anteriorly; antennae 

 6-segmented, terminal segment longest, legs normal, claw with den- 

 ticle, all digitules slender, knobbed, one tarsal digitule inserted above 

 the other and slightly longer; mentum stout triangular, apparently 

 1-segmented ; with a single long, cylindrical, blunt-tipped spiracular 

 spine opposite each spiracle; margin of body with a row of short, 

 blunt, tapering spines, about one to a segment, and a submarginal 

 row of tiny, apparently simple pores, dorsally with a submedian 

 longitudinal row of 8-shaped pores on each side, ventrally with two 

 or three longitudinal rows of slender setae and a single row of tiny 

 pores on each half, also with two or three multilocular disk pores 

 between each spiracle and its spine; anal plates protruding, each 

 chitinized, bearing one apical spine, two smaller spines, one slender 

 apical seta, and a smaller seta ; anal ring with pores and six setae. 



Cotype.—QoX. No. 24768, U.S.N.M. ^ 



