NO. 1808. RECENT AFRICAN CRINOIDS— CLARE. 21 



marked, disappearing on the tenth segment; P 2 15 mm. long, consid- 

 erably stouter than F t and not tapering so rapidly distally, with 

 twenty-five segments, at first short, becoming about as long as broad 

 on the eighth or tenth, and twice as long as broad terminally; from 

 the fourth segment there runs outward on the outer side of the 

 pinnule just distal to the medio-dorsal line a prominent narrow ridge 

 which continues almost to the tip ; there is a similar but less marked 

 ridge on P t ; second and following segments rather sharply, but not 

 highly, carinate; P 3 similar to P 2 , slightly longer, about the same size, 

 or slightly shorter and smaller; P 4 7 mm. long, rather stout, though 

 much smaller than P 3 , tapering evenly to the tip, with fifteen seg- 

 ments which become about as long as broad on the eighth; the second- 

 eighth are rather strongly carinate; P 5 similar, but more slender, 6 

 mm. long, with only the second-sixth segments carinate; the following 

 pinnules gradually lose the basal carination, become more slender, 

 and increase in length, reaching 8 mm. distally. 



The color is brownish purple. 



Localities. — Bagamoyo, German East Africa; the type is No. 4616, 

 Berlin Museum. 



Zanzibar; a smaller specimen in the British Museum has the 

 cirri XVI, 25-27, but is otherwise similar. 



Waxin; I also found in the British Museum a specimen (labeled 

 u Actinometra sp.") from Waxin, south of Mombasa. This specimen 

 has twenty-three arms 120 mm. long, the IIBr series being 4 (3 + 4) 

 and the IIIBr series being 2 ; the cirri are XX, 27 ; long, sharp dor- 

 sal spines are developed from the tenth segment onward. Compared 

 directly with a specimen of H. savignii the cirri are seen to be more 

 spiny, the spines commencing nearer the centrodorsal, and the 

 proximal pinnules are seen to be larger. 



Remarks. — This species comes nearest to Ampliimetra philiberti 

 from the East Indies, but it is a smaller and less rugged form with 

 fewer arms and much more spiny cirri. 



Genus CRASPEDOMETRA A. H. Clark. 

 CRASPEDOMETRA ATER, new species. 

 Antcdon ludovici Berlin Mus. MS. 

 Description. — Centrodorsal thick discoidal, the bare polar area 

 slightly convex, 4 mm. in diameter; cirrus sockets in one and a partial 

 second crowded and irregular marginal row. 



Cirri XXII, 32-36, 30 mm. to 33 mm. long, stout, not tapering dis- 

 tally; first segment short, the following gradually increasing in length 

 to the fifth or sixth, which, with the remainder, is about half again 

 as broad as long; on the fifteenth or sixteenth the middle of the distal 

 dorsal edge becomes prominent, this after one or two more segments 

 becoming a prominent rather high rounded carination of the entire 



