736 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



IV. Arms with more or less regular and uniform spots : 



(a) Spots confined to the division series and arm bases : 



Tropiometra pifta. Gephyrometra versicol-or. 



(b) Numerous small spots generally distributed: 



Capillaster multiradiata. Zygometra microdiscus, young. 



Capillaster clarki. Heterometra crenulata. 



C 'omantheria briareus. Pterometra pulcherrima. 



Antedon mediterranea. 



V. Arms with a median dorsal stripe : 



(a) A broad median stripe, lighter or darker than the color on either side, of it : 



C omantheria briareus. Gephyrometra propinqua. 



Tropiometra picta. Iridometra melpomene. 



Balanometra elongata. 



(b) A narrow median stripe, always very dark: 



Comaster minima. Oligometrides adeonce. 



Mariametra delicatissima. 



VI. Arms conspicuously and regularly cross banded: 



(a) With several more or less irregular broad bands : 



Zygometra microdiscus, young. Calometra separata. Dorometra briseis. 



(b) With a broad approximately central band: 



Comatella stelligera. Lamprometra protectus. 



Capillaster multiradiata. Neometra multicolor. 



Stephanometra spicata. Calometra callista. 



Antedon petasus. 



(c) With broad alternating bands of equal width : 



Capillaster multiradiata. Catoptometra magnifica. 



Comantheria briareus. fC atoptnmetra ophiura. 



Heterometra savignii. Catoptometra rubroflava. 



(d) With narrow alternating bands of equal width : 

 lleterometra crenulata. Neometra multicolor. 

 Heterometra affinis. Pectinometra flavopurpurea. 

 Homalometra denticulata. Daidalome.tra hana. 

 Lamprometra protectus. Parametra orion. 



f Lamprometra palmata. Lissometra alboflava. 



Cyllometr'i albopurpurea. Antedon petasus. 



Neometra conaminis. Antedon adriatica. 



Cyclometra clio. 



(e) With narrow well-spaced bands: 



Prometra chadwicki. Hathroinetra sarsii. Tropiometra pifta. 



