i 5 6 



developed; the lateral thirds of the dorsal surfao of the IBr, are rather thicklj covered with 

 fine short spines. Hie axillaries are rhombic, somewhat over twice as broad as long, with the 

 al angles truncate; the lateral sides formed by the truhcation of the lateral angles] are 

 only about one third as long as the sides of the IBr,; the proximal borders are modified like 

 the corresponding borders of the IBr . the distal borders are very finely spinous; the lateral 

 fourths of the dorsal surface are covered rather thickly with fine short spines Iike the lateral 

 thirds of the (Br ; the svnarthrial tubercles are low, and only slightly marked; the division 

 series are only slightly convex dorsally, sharply flattened laterally, and in very close apposition. 



The [IBr series are 2, the component ossicles resembling those of the IBr series, but 

 the proximal and distal borders are more finely spinous, and the spinous modification of the 

 lateral portion of the dorsal surface is relatively narrower exteriorly, and very narrow interiorly. 



The twenty arms are from 95 mm. to ioo mm. long; the spinous modification of the 

 lateral portion of the dorsal surface of the ossicles of the division series runs up in a very 

 narrow and progressively narrowing hand hoth internally and externally as far as the third or 

 fourth brachial; the proximal oblong brachials have very slightly everted edges; as the brachials 

 ime triangular serrate longitudinal striations appear, lirst only in the median line, but soon 

 over the entire dorsal surface of the ossicles, which have slightly overlapping and spinous 

 distal edge 



The specimen from* Stat. 254 is similar; there are 20 arms about 95 mm. long; the 

 cirri are 35 mm. to 40 mm. long with 56 — 60 segments. 



Stylometra A. 11. (huk. 

 The only species in this genus is the following: 



1. Stylometra spinifera (P. H. Carpenter). 



1'. II. Carpenter. Buil. Mus. Comp. Zool., vul. <>. 1881, N° 4, p. 158 (Antedon spinifera). 

 VON GRAFF. Huil. Mn-. Comp. Zool., vol. 11, 1883, X' ~, p. 129 (Antedon spinifera). 



"Challenger" Reports. Myzostoma, 1884, pp. 14, 15, 19 (Antedon spinifera). 



1'. II. CARPENTER. "Challenger" Reports. Comatulae, 1888, p. 370 (Antedon spinifera). 

 A. II. ( ] VRK. Huil. du Mus. d'hist. nat.. Paris, i <_> i 1 . N" 4, p. 256 (Stylometra spinifera). 

 — — Smithsonian Miscellaneous Collections, vol. 61 , [913, N° 15, p 43 (Stylometra spinifera). 



Stenometra A. II. ('luk. 

 Kej to the Species of the Genus Stenometra. 



'irri with 80 — 90 segments, about one quarter of the arm length; crest of 



the carination on the ossicles of tin- IBr series and the firsl two brachials 



rly or quite straight, without pronounced denticulations (Kei Islands; 



Me tres quinquecostata 



< irri with about rits 



segments only slightly longer than broad; profile ol the 

 median keel on the elements of the IBr eries and first two brachials 

 irregular and serrate (southern Japan; 91 ;o6 Metres) .... diadema 



