STAEFISHES OF THE PHILIPPINE SEAS. 391 



transversely oriented. These granules increase slightly in length on 

 the outer part of the ray, especially on the marginal plates, 1 to 4 

 having the form of blunt conical tubercles. On the actinal inter- 

 mediate plates the granules are also unequal, several in the middle 

 of plate being subtuberculate and only a little smaller than the adja- 

 cent outer series of adambulacral tubercles. At the base of the ray 

 8 or 9 granules can be counted across the widest part of the plate. 

 Terminal plate dorsal in position, subcircular, or a little wider than 

 long, convex, with 2 or 3 tubercular prominences in a transverse series. 



Relatively large 2- jawed excavate pedicellariae occur in very vari- 

 able numbers on the abactinal, marginal, and actinal intermediate 

 plates. They are more numerous in the cotype than in the type, 

 there being 1 or sometimes 2 on a majority of the plates. The form 

 into which the jaws fit when open is of the usual figure- 8 shape, 

 obliquely and longitudinally oriented, and is nearly as long as the 

 plate. Each jaw is broadly spatulate, semicicular distally, broader 

 than in 0. germani, and has 4 or 5 relatively large teeth with corre- 

 sponding indentations on the edge of the form. In well-formed pedi- 

 cellariae the diameter of distal expanded part of the jaw is about that 

 of the large granules. The alveolar " form " is excavated from the 

 plate itself and has a conspicuousl}^ elevated rim. The exact form 

 is best seen from the figure (pi. 95, fig. ^a-b). 



Abactinal papulae do not reach the end of ray, but the intermargi- 

 nal series comes within about 3 superomarginal plates of the tip. 

 Actinal intermediate series extends about half the length of ray. 

 Abactinal and intermarginal papulae, usually 3 to an area; actinal 

 intermediate papulae, 3, 2, and 1. 



Adambulacral plates wider than long, obliquely oriented; furrow- 

 spines 2 flattened, the adoral broadly spatulate, roundly truncate, 

 about twice as long as breadth at tip, the aboral slightly shorter, 

 much narrower, slightly tapering, and blimt. Forming a transverse 

 oblique, adorally trending series with the larger furrow spine, and 

 without intervening granules, is first a shorter compressed, broad, 

 round-tipped granule, then a longer, much thicker ovoid or acorn- 

 shaped slightly flattened tubercle, about as long as the larger fur- 

 row spine, but much more conspicuous. Between these consecutive 

 transverse series is a transverse series (occasionally 2) of elongate, 

 bluntly pointed granules ; and external to the series of tubercles is a 

 less regular series of shorter actinal intermediate tubercles, inter- 

 spersed with a few longitudinally oriented pedicellariae. The outer 

 adambulacral tubercle is directly behind the median, and that is 

 nearly opposite the interval between the adoral larger spine of one 

 plate and the aboral spine of the adjacent (adoral) plate. This is 

 due to the oblique orientation of the plates. 



