196 HAWAIIAN AND OTHER PACIFIC ECHINI. 



land Museum at Brisbane contained a tray of partly disintegrated Moiras which 

 were labeled as having been taken at the Capricorn Islands, on the Queensland 

 coast. 



Key to the Species of Moira. 



Interambulacra 2 and 3 within the peripetalous fasciole considerably and abruptly de- 

 pressed; posterior end of test nearly or quite vertical. 



Phyllodes rather small and actinal ambulacra narrow and not very bare; tubercled 

 portion of sternum less than two thirds as wide as long, its anterior end less than 

 one third of test-length from anterior end of test (within the furrow of ambula- 

 crum III) alropos. 



Phyllodes and actinal ambulacra large and bare; tubercled portion of sternum three 

 fourths as wide as long, its anterior end two fifths of test length from anterior end 



of test (within furrow) clotho. 



Interambulacra 2 and 3 within the peripetalous fasciole slightly and not abruptly depressed; 

 posterior end of test somewhat concave, its lower margin projecting further aborally 

 than its upper portion stygia. 



Moira atropos. 



Spatangus atropos Lamarck, 1816. Anim. s. Vert., 3, p. 32. 

 Moira atropos A. Agassiz, 1872. Rev. Ech., pt. 1, p. 146. 



This species is particularly characteristic of the coast of the southeastern 

 United States from Beaufort, N. C, where it is abundant, to Texas. I have seen 

 bare tests from Jamaica and it is also recorded from Guadeloupe, but it must be 

 rare in the West Indies for it was not met with by the Blake. 



Tridentate pedicellariae are very common but I failed to find any globiferous, 

 or any other kind. The tridentate are not characteristic or peculiar in any 

 way; the valves are somewhat compressed near base but the blade is rather 

 flat and is a little wider distally than near base; the valves range from those 

 about .30 mm. long, .08 mm. wide at base and .07 mm. near tip to those .75-.80 

 mm. long, .10 mm. wide at base and only .07 or .08 mm. wide near tip. 



Moira clotho. 



Moera clotho Michelin, 1855. Rev. Mag Zool., p. 247 

 Moira clotho A. Agassiz, 1872. Rev. Ech.. pt. 1. p. 147 



Plates 146, fig. 28 \ 156, figs. 5-7. 



This is the West coast species found from the (Julf of California south- 

 ward. As it has never been figured, photographs of the bare test from different 

 points of view are shown (PI. 156, figs. 5-7). Of pedicellariae. I was surprised 



