NO. IO CRINOIDS OF HAMBURG MUSEUM — CLARK 23 



cirri are, as usual, rather stout ; the division series and arm bases are 

 strongly convex and rugged; P 3 is the longest, about 15 mm. long 

 with about twenty segments. 



2. Pitiht, Admiralty Islands; Dr. G. Duncker. — One specimen 

 with twenty-eight arms 150 mm. long; the longest cirri have 32 

 or 33 segments, dorsal spines being developed from the eleventh or 

 twelfth onward; P 3 is 15 mm. long with twenty-eight or twenty-nine 

 segments. This specimen is intermediate in character between the 

 two at Leyden upon which Miiller based the names Hagellata and 

 elongata, though rather nearer the latter. 



DICHROMETRA FLAGELLATA var. AFRA, new variety 



Antcdon Hagellata 1899. Ludwig, Senck. naturforsch. Ges., vol. 21, Heft 4, 

 p. 538 (Reef opposite harbor of Lamu. Zanzibar). 



Dichrometra sp. 1911. A. H. Clark, Proc. U. S. Nat. Mus., vol. 40, p. 27 

 (two headings; Cape St. Andre, Madagascar; Zanzibar). — 1911. A. H. 

 Clark, Bull, du museum d'h'ist. nat., No. 4, 191 1, p. 254 (Cap Saint- 

 Andre, Madagascar). 



I. Madagascar ; C. Moll.- — The centrodorsal is low hemispherical, 

 4 mm. in diameter at the base ; the dorsal pole is flat, 2.5 mm. in 

 diameter; the cirrus sockets are arranged in two irregular marginal 

 rows. 



The cirri are about XX, 23-29, 15 mm. to 18 mm. long; the first 

 segment is very short, the following gradually increasing in length 

 to the fifth or sixth which is about as long as broad and the sixth- 

 ninth or seventh-tenth which are the longest, slightly longer than 

 broad; the following g-radually decrease in length, those in the outer 

 half being slightly broader than long ; the ninth or tenth and following 

 bear prominent blunt dorsal spines of moderate size. 



There are twenty-nine arms about 85 mm. long; IIIBr series are 

 developed externally ; the division series are broad with the ventro- 

 lateral edges of the segments extended laterally as a thin narrow 

 border the outer e^lge of which is parallel to the axis of the division 

 series ; synarthrial and articular tubercles are not developed. 



P x is 8 mm. long with from twenty-one to twenty-five segments, 

 slender, delicate and flagellate ; the first segment is twice as broad as 

 long, the third about as long as broad, and those in the outer half 

 twice as long as broad; the pinnule tapers rather rapidly in the first 

 four segments, more gradually from that point onward. P 2 is 9.5 

 mm. to 10 mm. long, witli from twenty-two to twenty-five segments, 

 similar to P, but stouter and tapering more evenly. P 3 is 10 mm. 

 long with from twenty-two to twenty-four segments, similar to I '._. and 



