xro. 1S08. RECENT AFRICAN CRICOIDS— CLARK. 23 



Locality. — Red Sea; the type, which is No. 1055, Berlin Museum, 

 was collected by Hempricht and Ehrenberg. 



Remarks. — The stout short-segmented cirri which do not taper 

 distally, and the uniformly large size of P 2 , which is much larger than 

 P 3 , at once distinguish this species from all others in the genus. 



CRASPEDOMETRA MADAGASCARENSIS, new species. 



Description. — Centrodorsal thick-discoidal, the bare polar area 

 slightly convex, 4 mm. in diameter; cirri arranged in two closely 

 crowded irregular marginal rows. 



Cirri XVI, 34-36, 25 mm. to 30 mm. long, stout basally, tapering 

 slightly in the proximal half; first segment short, the following slowly 

 increasing in length to the eighth or tenth, which is slightly broader 

 than long to one-third broader than long, the distal segments being 

 slightly shorter again ; from the eleventh-fifteenth (usually about the 

 fourteenth) onward small but prominent dorsal spines are developed; 

 opposing spine larger than the spine on the preceding segment, tri- 

 angular, the apex subterminal, arising from the whole dorsal surface 

 of the penultimate segment, and equal in height to about one-half of 

 its lateral diameter; terminal claw somewhat longer than the penulti- 

 mate segment, moderately slender, especially in the distal two-thirds, 

 rather strongly curved proximally but becoming straighter distally. 



Radials concealed; IBr t very short, bandlike, in apposition later- 

 ally; IBr 2 very broadly pentagonal, twice as broad as long, the lateral 

 edges only half as long as those of the IBr x ; IIBr 4(3 + 4); IBr and 

 IIBr series and first brachials in close lateral apposition and laterally 

 flattened ; these flattened lateral edges are moderately produced ; syn- 

 arthrial tubercles obsolete. 



Sixteen arms (in the type) 130 mm. long; first brachial slightly 

 wedge shaped, twice as broad as long exteriorly, entirely united interi- 

 orly; second brachial about the same size, but more obliquely wedge 

 shaped ; third and fourth (syzygial pair) slightly longer interiorly than 

 exteriorly, twice as broad as the exterior length; next three or four 

 brachials oblong, three times as broad as long, then becoming very 

 obliquely wedge shaped, twice as broad as long, after the proximal 

 fourth of the arm gradually becoming less obliquely wedge shaped, 

 but never oblong; eighth and ninth and following with slightly pro- 

 duced distal edges, this character gradually dying away after the 

 middle of the arm. 



P t slender, becoming very delicate in the distal half, 10 mm. long 

 with twenty-six to twenty-eight segments, the first short, the follow- 

 ing gradually increasing in length so that the eighth and following 

 are about as long as broad; the second-fourth are rather strongly. 

 carinate. 



