410 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



joint with lower front corner produced downward; fifth joint very 

 short, produced below into narrow lobe; sixth joint large, strong, 

 palm oblique, without defining angle, deeply incised in middle, bearing 

 prominent bicuspid tooth near hinge. Outside of proximal end of 

 palm with row of 6-7 stout spines, one nearest middle of palm largest 

 and separated from rest; opposite these on inner surface of palm are 

 2 rows of spines, upper row with 2 spines and lower with 3. Rear 

 margin of sixth joint with 8-9 rows of slender spines. Seventh joint 

 strong and, when closed, rests between edge of palm and outside row 

 of spines. 



Pereopods 1 and 2 alike, 2 slightly longer. Pereopods 3-5 much 

 alike, 4 slightly the longest; second joint expanded, hind margin 

 smooth; fom'th joint rather long, narrow, hind margin produced to 

 about middle of fifth joint. 



Coxal plates 1-4 about twice as deep as their respective body seg- 

 ments; first produced forward with lower front corner quadrate. 

 Coxal plates 5 and 6 with small rounding front lobes, deep hind lobes. 

 Sixth and seventh pereon segments and first and second pleon seg- 

 ments produced dorsally into sharp backward-pointing teeth; third 

 pleon segment carinate, produced dorsally to slight angle, but not 

 toothed. Hind margins of pleon segments sinuous, sharply produced 

 below, first least produced. 



Uropods 1 and 2 extending back about same distance, which is 

 farther than uropod 3. Telson boat-shaped, broadly oval, slightly 

 longer than wide, hind margin evenly rounding, reaching to about 

 middle of peduncle of uropod 3 and bearing spinule on either lateral 

 margin. Length of male from front of head to end of uropods about 

 24 mm. 



Female. — Appears to be like male, even in gnathopods. Length 

 about that of male. 



Types.— Male holotype, USNM 93874, and 27 paratypes, USNM 

 107863, taken by steamer Albatross at station 4781 (52°14'30" N, 

 174°13' E), June 7, 1906, in 482 fathoms. 



Remarks. — Sympleustes quadridens Bulycheva (1955) also has 4 

 dorsal teeth but its gnathopods are slender, poorly subchelate, and 

 have elongate fifth joints. It is the only other species with dorsal 

 teeth assigned to the genus "Sympleustes^' by Barnard and Given 

 (1960). 



Parapleustes pugettensis (Dana) 



Figure 10 



Iphimedia pugettensis Dana, 1853, pp. 932-933, pi. 63, fig. 6. 

 Parapleustes pugettensis (Dana). — Barnard and Given, 1960, pp. 43-45, fig. 4 

 (synonomy) . 



