42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 72 



PLATE 4 

 Fig. 3Q. Crown and upper part of the column of Monachocrimis scxradiatus. 



PLATE 5 

 Fig. 40. Crown and upper part of the cokimn of Proisocrinus niberrimus. 



PLATE 6 



Fig. 41. Crown and upper part of the column (above) and central portion 

 of the column (below) of a pentacrinite, Cojiiastrocrinus 

 springeri. 



PLATE 7 



Fig. 42. Crown and upper part of the column (a), and middle (b) and lower 

 (r) part of the column of Ptilocrinus pinnatus ; in life the upper 

 part of the column is recurved so that the crown points directly 

 downward. 

 43. Co}natilia iridonietriformis, a species of Comasteridas with some of 

 the pinnules at the base of the arm lacking. 



PLATE 8 



Fig. 44. A specimen of Comatula pectinata from Singapore showing long 

 anterior and short posterior arms (compare with fig. 36). 



PLATE 9 

 Fig. 45. Neomctra acanthaster, one of the Calometridse. 



PLATE 10 

 Fig. 46. Astcromctra viacropoda, one of the Ptilometrinse. 



PLATE II 

 Fig. 47. Antcdon adriatica, one of the Antedoninae. 



PLATE 12 

 Fig. 48. Compsoinctra iiicominoda, one of the Antedoninoe. 



PLATE 13 



Fig. 49. Thaimiafocrinus jiingcrscni, a ten armed species of Pentametro- 

 crinidse. 



PLATE 14 



Fig. 50. Pcntamctrocriniis dioi)!cdc(C, a five armed species of Pentametro- 

 crinidse. 



PLATE 15 



Fig. 51. An arm of Hctcromctra coiiipta, showing the difference between 

 the oral, genital and distal pinnules. 



