A MONOGRAPH OF THE EXISTING CKESTOIDS 7 



Genus STENOMETRA A. H. Clark 



Antedon (part) P. H. Carpenter, Challenger Reports, Zool., vol. 26, pt. 60, 1888, p. 215, and following 



to ^i— ^ Carpenter, 1888) ; Vid. Medd. Naturhis, Fore, K.benhav, 190* 

 n 193 (probably occurs at Singapore); Crinoids of the Indian Ocean 1912 p. 9 (absent from 

 Au tral a) p 11 (absent from the west coast of the Malay Peninsula, the Andaman*, and farther 

 Australia) p. 1 1 i p . 209 (original reference; type); Journ. Washington Acad 



Sc 6 i ;o P l 6 So f 1916, p 116 '(comparison of arms with those of Daidalometra) ; Unstalked 



cHnoids of 't£% 6 ; ff a-E X ped., 1918, p. 148 (inkey; ^Y^aT^^^T^ 



JftS ^29 p P 64^9 20 -GiS E P N ; Kungl. Fysiogr. Sails*. Handl., new ser., vol. 45, No. 11, 

 1934, p. 20. . 



Diaqnosis.-A genus of Thalassometridae in which the division series, which are 

 all 2 and arms are laterally compressed and sharply carinate gablelike in cross section 

 the brachial carination being produced into high crests or *™* °lf^JZl' 

 the arms in fully developed individuals are normally 20 in number, 65-100 mm. long, 

 here "sno appreciable expansion of the earlier segments of the genital pinnule ; Pi 

 esembes P 2 but is somewhat longer and proportionately stouter; the cirn are long 

 slender and delicate, 25-75 mm. long with 50-90 segments, and are arranged m 10 

 columns on the small conical or truncated conical centrodorsal. 



^graphical range.-Yrom Timor and the Moluccas north to the Bonin Islands 

 and southern Japan from the Korean Straits to Sagami Bay. 

 Bathymetrical range.-Fvom 141 (?95) to 457 meters. 



^^-XlSri^^Wein understood includes four species. One 

 of these the very spiny S. dentata from the Bonin Islands, appears to be quite distinct 

 trom the othlrs a though 8. snelliusi from Ceram is to a certain extent intermediate 

 between itandth othfr two. Stenometra diadma is the Japanese representative of 

 Jhe East Indian S. gumuecostata from which it seems always to be distingmshable 



*^ -^t^U» of this genus was described under the name of 

 **&""** ^ Dr. P- ^ ^P^in -SB. It ju .trans ^^J 



as.the included -^^^^^l^ v ^^I^ ^ 



SESSSssrss sf =="=—= 



DaiMometra Una having appeared without any explanation m 1915. 



KEY TO THE SPECIES IN THE GENUS STENOMETRA 



... p ra „»., „d di.ua «.*«. .. *= =— - •». di™» : -» :?^™T:tr^z 



twice as long as broad. 



