NO. IO CRINOIDS OF HAMBURG MUSEUM CLARK 1/ 



The longest pinnules have about twenty-two segments. 



This species differs from A. producta in having long spines on the 

 outer cirrus segments instead of a slight carination ; it is also a stouter 

 form than producta, the cirri especially being stouter and longer 

 without the distal taper seen in those of producta. The lower pinnules 

 are more cylindrical (less prismatic) than are those of producta, and 

 the spini ais eversion of the distal edge of the segments is not increased 

 at the prismatic angles, but is uniform all around the dorsal side. 



So far as I can see this specimen only differs from that described as 

 brockii by Hartlaub in its smaller size. 



AMPHIMETRA LJEVIPINNA (P. H. Carpenter) 



Antedon lavipinna 1882. P. H. Carpenter, Journ. Linn. Soc. (Z06L), vol. 

 16, p. 502 (1). 



Antedon milberti (part) 1891. Hartlaub, Nova Acta Acad. German., vol. 

 58, No. 1, p. 81 (1). 



Himerometra scklcgclii (part) 1908. A. H. Clark, Proc. Biol. Soc. Wash- 

 ington, vol. 21, p. 223. 



Amphimetra schlegelii (part) 1909. A. H. Clark, Proc. Biol. Soc. Wash- 

 ington, vol. 22, p. 7. — Vidensk. Medd. fra den natnrhist. Forening i 

 Kpbenhavn, 1909, p. 158. 



1. Canton, China; Werner. — The ten arms are about 95 mm. long; 

 the cirri are XI, 27-33, 2 3 nim - l° n g> moderately slender; the longest 

 proximal segments are slightly broader than long to about as long as 

 broad; the short outer segments are about twice as broad as long; 

 long, sharp and prominent dorsal spines are developed from the 

 tenth or eleventh segments onward ; the cirri have a very slight distal 

 taper ; the synarthrial tubercles are prominent, but broad and blunt, 

 not produced as in A. ensifcr. 



This specimen is quite indistinguishable from the ten armed speci- 

 men in the type series of A. schlegelii, with which I was able to 

 compare it directly ; in size, as in other characters, there is the closest 

 agreement. 



2. No Locality ; C. Eberstein. — One specimen closely resembling' 

 the type in every particular, but slightly smaller; the arms are 70 mm. 

 long. 



HIMEROMETRA MAGNIPINNA (A. H. Clark) 



Antedon crassipinna (part) 1890. Hartlaub, Nachr. Ges. Gottingen, Mai,. 



1890, p. 185 (1). — 1891. Nova Acta Acad. German., vol. 58, No. 1, p. ?2 



(1). 



I. Cochin China. — One magnificent specimen with forty-five arms 



160 mm. long and cirri about XXX (with some undeveloped), 



28-32, 35 mm. to 41 mm. long; the longest proximal cirrus seg- 



