406 PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXVI. 



flattened outer side, the other internal; the external keel is armed 

 with fine spines; the distal joints are prismatic, with the angles 

 somewhat produced; P, has a similar double carination, but, while 

 the exterior keel is much lower, it persists in a raised and very spi- 

 nous line to the tip of the pinnule; the ends of the distal joints are 

 much more spinous than in P^; P3 6 mm. long, more slender than 

 P2, being in about the same proportion to that pinnule as it is to 

 Pi, with twelve joints, at first broad, becoming about as long as broad 

 at the fifth, and longer than broad distally; the pinnule is strongly 

 prismatic, the ridges and the distal ends of the joints being spinous; 

 but the two basal keels are only slightly marked ; P^ and the follow- 

 ing pinnules from P^ onward similar to P., but slightly more slender, 

 with the joints projDortionately slightly longer ; distal pinnules 12 mm. 

 long, rather stout, strongly prismatic, with eighteen joints, the first 

 crescentic, the second strongly trapezoidal, about as broad as its 

 greater length, the remainder about half again as long as broad; the 

 external ridge is somewhat produced, and finely spinous. 



Color. — Bright yellow, the cirri lighter. 



Type.— Cat No. 25462, U.S.N.M., from Albatross station 5236; 

 off the east coast of Mindanao, north of Lianza Bay ; 494 fathoms. 



A young specimen with arms 60 mm. long was dredged at Station 

 5116; north of Maricaban Island (between Luzon and Mindoro) ; 

 200 fathoms; it possesses one II Br series of 4(3+4). 



Genus PARAMETRA A. H. Clark. 



PARAMETRA COMPRESSA (P. H. Carpenter). 



One specimen from station No. 5255; off Davao (town) ; 100 fath- 

 oms; and another very fine example from station 5166; off Simonor 

 Island ; 97 fathoms. 



Subfamily CH:A.E,ITOM:E!TR.I]Sr.^. 

 Genus PACHYLOMETRA A. H. Clark. 



PACHYLOMETRA LEVIGATA, new species. 



Centro-dorsal thick-discoidal or more or less columnar, the polar 

 area flat, 2.5 mm. or 3 mm. in diameter; cirrus sockets arranged in 

 three columns in each radial area, the two outer columns converging 

 distally, usually meeting beyond the middle column; columns usually 

 separated by more or less developed ridges. 



Cirri XXX-XXXV, 14-15, 15 mm. long; first two joints about 

 twice as broad as long; third joint about as long as broad; fourth to 

 seventh or eighth half again as long as broad, then gradually de- 

 creasing distally, the third and fourth from the end being only 



