38 Mr. A. n. C ark on neto Crinoids 



broad as long ; the first segment has the distal dorsal edge 

 produced ; on the second and third this becomes a strong 

 transverse ridge, which gradually moves anteriorly, becoming 

 median on the eighth and following, and appearing as a 

 minute median spine in lateral view ; this ridge shows no 

 tendency to resolve itself into paired spines or tubercles, nor 

 does it narrow appreciably on the outer segments, appearing 

 as a broad transverse ridge on the antepenultimate; the 

 opposing spine is small, slender, median, erect, in height 

 equal to about one-quarter of the lateral diameter of the 

 penultimate segment. 



The arms, which resemble those of the other small species 

 of the genus, are 40 mm. long. 



Pi is 5'5 mm. long, with fourteen or fifteen segments, 

 moderately slender and somewhat stiffened ; the first segment 

 is short, the following gradually increasing in length, so that 

 the fifth is about as long as broad and the outer very 

 slightly longer than broad ; from the third segment outw^ird 

 the pinnule is rather strongly prismatic, with a prominent 

 rounded ridge running along the centre of the outer 

 surface ; P2 is 6*5 mm. long, with seventeen segments, 

 resembling Pi, but slightly more slender basally and tapering- 

 more evenly to the tip, and not so strongly prismatic ; P3 is 

 4'5 mm. long, with fourteen segments, similar to the pre- 

 ceding, but proportionately smaller, and more slender distally ; 

 P4 is 3*5 mm. long, with thirteen segments, small and 

 slender, with the outer segments twice as long as broad ; P5 

 is similar, 3 mm. long, with eleven or twelve segments ; 

 Pg resembles Pg ; the distal pinnules are very slender, 7 mm. 

 long, with from twenty to twenty-two segments ; the outer 

 edges of the segments of the earlier pinnules are perfectly 

 smooth. 



Type Locality. Saleyer (north of Flores). 



Prometra minima, sp. n. 



The centrodorsal is thin discoidal, with a flat finely papillose 

 dorsal pole 1 mm. in diameter. 



The cirri are X, 10-12, 3 mm. to 4 mm. long : the first 

 segment is short, the following gradually increasing in 

 length, so that the fifth or sixth and following are about as 

 long as broad ; the second and following have a finely serrate 

 transverse ridge, which becomes median after the fourth or 

 fifth ; this transverse ridge is low and very narrow, appearing 

 as a very minute sharp spine in lateral view^ ; on the second, 

 third, and fourth segments the lateral angles of this ridi>e 



