MONOGRAPH OF THE EXISTING CEINOIDS. 



81 



r~i — r 



Fig. 48. 



FlO. 46. 



FlO. 47. 



Fig. 49. 



Fig. 50. 



cisxEnn: 



^iTSC^^iSnc^ic^^ 



Fig. 51. 



oxric^ 



Fig. 52. 



Fig. 53. 



Fig. 54. 



Fig. 55. 



Figs. 46-55.-46, An arsi tip from a specimen of Pterometra trichopoda from the PraLippDJE Islands, showing the 



ABRUPT termination AND THE INCURVING OF THE TERMI.VAL BKACIIIALS. 47, ThE TIP OF A POSTERIOR ARM OF A SPECIMEN 

 OF COMATULA PECTINATA FROM THE PinLIPPINE ISLANDS, SHOWING THE TERMINAL A.XILLARY AND THE TWO FINIAL PINNIXES. 

 48, Tip OF A MIDDLE PINNULE OF A YOUNG SPECIMEN OF PTILOMETRA MACRONEMA FROM SOUTHWESTERN -AUSTRALIA, %nEWED 

 LATERALLY WITH THE DORSAL SIDE DOWN, AND DORSALLY. 49, Tip OF A DISTAL PINNULE OF A SPECIMEN OF -\STERO- 

 METRA ACERBA FROM THE SaHUL BANK, nEWED LATERALLY WITH THE DORSAL SIDE DOWN (a), .\ND DORSALLY (6); THE MID- 

 DORSAL CARINATION IS INDICATED BY DOTTED LINES. 50, TiP OF A PI.VNULE FROM THE MIDDLE OF THE ARM OF A LARGE SPECI- 

 MEN OF COMANTHUS TRICHOPTERA FROM NEW SOUTH WALES, VIEWED LATERALLY WITH TOE DORSAL SIDE DOWN. 51, Tip 

 OF A DISTAL PINNULE OF A SPECIMEN OF CoMATELLA STELLIGERA FROM THE INDIAN OCEAN, VIEWED DORSALLY (a), AND 

 LATERALLY (6). 52, Tip OF A DISTAL PINNULE OF A SPECTMEN OF CaPILLASTER MULTIRADIATA FROM THE PHILIPPINE ISLANDS, 

 VIEWED LATERALLY WITH THE DORSAL SIDE DOWN (a), AND DORSALLY (6). 53, I.ATERAL VIEW OF A DISTAL PINNULE FROM A 

 SPECIMEN OF ASTEROMETRA ACERBA FROM THE SaHUL BANK, ILLUSTRATING A TRIANGULAR OR PRISMATIC PINNULE. 54, END 

 VIEW OF .\ SINGLE SEGMENT OF A DIST.VL PINNULE FROM A 3PECIME.N OF .VSTEROMETRA ACERBA FROM THE SaHUL BaNK, 

 ILLUSTRATING THE CROSS SECTION OF A TRIANGULAR OR PRISMATIC PI.VNULE. 5j, LATERAL VIEW OF A PORTION OF A DISTAL 

 PINNULE FROM A SPECIMEN OF PACHYLOMETRA SELENE FROM THE PlIIUPPINE ISLANDS, SHOWING THE SIDE AND COVERING 

 PLATES. 



