135 



is about twice as long as broad, the ninth or tenth about three times as long as broad, and 

 the distal slightly longer; the third and following have a distinct, though low and faint, median 

 carination, and are slightly constricted centrally with prominent distal ends which project at the 

 prismatic angles in the form of short spines. P., is 1 7 mm. long with 20 segments, resembling 

 P 3 but slightly stouter and with more elongated segments of which the first two are only 

 slightly enlarged, and the third has a larger carinate process than the corresponding segment 

 of P 2 ; the dorsal carination is also more prominent; P ( on the arms arising from the IIBr 

 axillaries is slightly larger and stouter than P.,, but similar to it; the first segment is not 

 enlarged, though distally it is roundedly carinate; the second segment is about as broad basally 

 as the proximal (greater) length, and is slightly carinate distally; the dorsal carination of the 

 pinnule resembles that of P... On the arms arising from the IBr axillaries P^ is 11 mm. long, 

 similar to P s but smaller and more slender. P 3 is 8 mm. long and resembles P 4 but tapers 

 more evenly and rapidly; the first segment is without a distal carinate process. The genital 

 pinnules have the third-sixth segments with produced ventral edges protecting the genital glands; 

 this production of the ventral edges reaches a maximum on the fourth, thence decreasing more 

 gradually distally. The distal pinnules are 10 mm. long with 15 segments. 



The disk is completely covered with a solid pavement of plates as in the other species 

 of the genus. In the perisomic angles about the mouth are five prominent though small orals, 

 probably of perisomic origin, each of which typically has at each proximal angle a large oblong 

 plate continuing it outward. 



The colour is light purple, the cirri and pinnules white. 



Another large specimen resembling the preceding has 17 arms about 70 mm. long; the 

 IIBr series are absent on one ray, and on one half of another ray ; the cirri are XVI, 42 — 50, 

 25 mm. to 28 mm. long; P., and P 3 may have a narrow irregular dentate carination on the 

 fourth-fifth or fourth-sixth segments. Of the remaining examples one has 13 arms 60 mm. long; 

 one has 10 arms 55 mm. long; one has 11 arms 45 mm. long; one has 10 arms 35 mm. 

 long; one has 11 arms 30 mm. long, and one has 11 arms 25 mm. long; of the three 

 remaining, which are very small, one has 1 3 and one 1 2 arms. 



The specimen from Stat. 260 has 16 arms 45 mm. long; there are 42 segments in 

 the cirri. 



2. Neometra sibogac A. H. Clark. 



A. H. Clark. Zool. Anzeiger, Bd. 39, 1912, N° u/12, p. 421. 



Stat. 305. Mid-channel in Solor Strait, off" Kampong Menanga. 113 Metres. 4 Ex. 



Centrodorsal thia discoidal, the broad polar area flat, 4 mm. in diameter; cirrus sockets 

 arranged in a single fairly regular marginal row. 



Cirri XV, 31 — 36, about 25 mm. long, large and stout; their bases are crowded against 

 those of the adjacent cirri, and the first segments are more or less sharply flattened laterally; 

 the first two segments are about twice as broad as long, the following gradually increasing in 



