208 Bulletin American Museum of Natural History. [Vol. XXXII, 



proper to consider the differences between the specimens as probably.specific. 

 The most striking of these differences is in the granulation of the disk; in 

 the specimens from Lower California, many plates are exposed, while in the 

 one from Salvador (see also Verrill's description) no plates except portions of 

 some radial shields are free from the granules. The interbrachial areas 

 below are also more closely granulated in the Salvadorian specimens, and 

 the oral shields are less angular and more oval. These differences are not a 

 matter of size, since Verrill's cotype is intermediate between the two from 

 Cape St. Lucas, but it may be that they come well within the limits of 

 individual variation in daniana. Until this can be shown however, the 

 latter name may be kept for the southern specimens w y ith no exposed disk 

 plates, while a.riologum should be used for the northern form with many 

 exposed disk plates. If this difference is shown to be inconstant, then 

 axiologum will become a synonym of daniana, but the status of the genus 

 and its designated type will remain unaltered. 

 Cape St. Lucas. Two specimens. 



Ophiura flagellata. 



Ophioglypha flagellata LYMAN, 1878. Bull. M. C. Z., Vol. 5, p. 69. 



Ophiura flagellata MEISSNER, 1901. Bronn's Thierreichs, Vol. 2, pt. 3, p. 925. 



There is a single adult specimen with the disk 25 mm. across and well 

 covered with plates. Lines of decalcification radiate from the center of the 

 disk in each radius and interradius; the latter are the longer, extending 

 two thirds of the way to the margin. 



Station 5677. North of Cape San Lazaro, west coast of Lower Cali- 

 fornia, 735 fms. Bottom Temp., 38.6. 



Ophiura superba. 



Ophioglypha superba LUTKEN and MORTENSEN, 1899. Mem. M. C. Z., Vol. 23, 

 p. 116. 



Ophiura superba MEISSNER, 1901. Bronn's Thierreichs, Vol. 2, pt. 3, p. 925. 

 Ophiura hadra, H. L. CLARK, 1911. Bull. U. S. Nat. Mus., No. 75, p. 80. 



While comparing one of these newly taken specimens with a cotype of 

 xi/perba L. &. M. and a cotype of hadra H. L. C., it became perfectly obvious 

 that those two species are identical and there is no excuse to be offered for 

 publishing hadra as a "new species." The present collection contains a 

 good series, with disk-diameters ranging from 4 to 33 mm. 



