Clark — New Genera and Species of Crinoids. 223 



broad, the third squarish, the remainder half again as long as broad; 

 P 3 11mm. long, resembling P 2 , though slightly more slender; P 4 9mm. 

 long, slightly more slender than P 3 ; P 5 and following pinnules 9mm. 

 long, very slender, and flagellate distally; the distal pinnules are 12mm. 

 Long. 



Type locality. — "Indian Ocean." 



Type, in the collection of the University of Copenhagen. Another speci- 

 men in the same collection was taken in the Straits of Malacca. 



Himerometra schlegelii (Lutken MS.) sp. nov. 

 Alecto schlegelii Lutken MS. 



Centro-dorsal thick-discoidal, the polar area thickly covered with small 

 low flattened tubercles, bearing two closely crowded alternating rows of 

 cirrus sockets. 



Cirri xv, 26-35 (usually 30-35), about 20mm. long; first joint short, 

 second about twice as broad as long, third slightly longer, fourth squarish; 

 following to the twelfth or fourteenth squarish (some of the more prox- 

 imal occasionally slightly longer than broad), the length then very 

 gradually diminishing, so that the terminal joints are about one third 

 broader than long; from the twelfth joint onward comparatively long 

 sharp dorsal spines are developed; opposing spine considerably longer 

 than the spines on the few preceding joints, about equal to the diameter 

 of the penultimate joint in length, and rather slender, abruptly curved 

 basally, but nearly straight in its distal half. 



Radials projecting slightly beyond the edge of the centro-dorsal; first 

 costals oblong, three or four times as broad as long, the lateral edges 

 swollen into an elongate tubercle, and in close apposition ; costal axillaries 

 broadly pentagonal, about twice as broad as long, in lateral apposition; 

 distichals (when present) 4 (;!+!). Ten to thirteen arms about 70mm. 

 long; first brachial short, slightly longer outwardly than inwardly, 

 interiorly united for about two-thirds of their length; second brachial 

 somewhat larger and irregularly quadrate, rising to a rather prominent 

 tubercle with the first brachial, resembling that between the costals; third 

 and fourth brachials (syzygial pair) about as long as the second brachial 

 (three times as broad as long), oblong; following six brachials oblong, 

 about three times as broad as long, then becoming wedge-shaped or 

 almost triangular, gradually becoming oblong again and decreasing in 

 length, the joints in the distal half of the arm being extremely short and 

 diseoidal, with projecting distal edges. Syzygies occur usually between 

 the third and fourth (once between the fourth and fifth) brachials, again 

 between the eleventh and twelfth to seventeenth and eighteenth (with 

 occasionally an additional one between the ninth and tenth ), and distally, 

 in one specimen at intervals of nine or ten, in the other of eleven to 

 twenty-five oblique muscular articulations. 



The costals and first two brachials are in close apposition, and are 

 laterally flattened. 



P x about 5mm. long, comparatively slender, tapering evenly from 



