MONOGRAPH OF THE EXISTING CRINOIDS. 



291 



in the ontogeny of the abrupt acceleration in cirrus growth which originally gave 

 rise to it, many of its peculiarities, so that it has become difficult to differentiate 

 from the other cirrals, and the segments grade more or less imperceptiblj^ from the 

 long proximal into the short distal type. 



< J° [■ t- [.- L- 1- M> p » D8 feiiXED 



Fig. 349. 



^H'H. | ' l 'M' | . | '|i|M'Hhl'>l>bbt tn < i M \ ' [ .[—LLmr. 



Flo. 350. 



Fig. 351 



EEnmm 



AJ^a^xDoxccai 



Fio. 352. 



Figs. 349-352.-349, A CIRRC3 FROM A SPECIMEN or DECAMETKA MOLLI.S FKO« KURRACHI VIEVTEP (o) BORSALLY AND (6) LAT- 

 ERALLY. 350, A CraRUS FROM A SPECIMEN OF COLOBOMETRA PISCOLOR FROM THE EASTERN PART OF THE I)AY OF BENGAL 

 VIEWED (a) DORSALLY AND (6) LATERALLY. 351, LATERAL \TEW OF A CIRRUS FROM A SPECIMEN OF I'ROMETRA OWSTONI FROM 



SOUTHERN Japan. a52, A cirrus from a specimen of Ougometr.v serripinna from Singapore mewed (a) dorsally 



AND (&) laterally. 



In those oligophreate forms in which there is but little difference between the 

 proximal and distal segments, as in certain species of AmpUmeira (figs. 86, p. 141, 

 335, p. 283, and 33G, p. 285), in Cenometra (figs. 87, p. 143, and 345, p. 289), in Comac- 

 tinia ecUnoptera (fig. 328, p. 281), and m numerous species among the Himero- 



