STARFISHES OF THE PHILIPPINE SEAS. 429 



above the base, about as indicated in von Marenzeller's figure. Thif? 

 character is also present in a young specimen with R=42 mm. 



I have examined the outer layer of the integument for the holo- 

 thurianlike deposits described by von Marenzeller and find them 

 present in the form of irregular!}'- branched rods scattered irregu- 

 larly and not crowded as in the following species. These rods are 

 of variable size and form; sometimes the branches unite and form 

 open lattice-plates with 1 to 5, or even more, unequal and irregular 

 perforations. There are fewer perforated plates than rods. (See 

 pi. 114, figs. 5, 5rt-<?. 



The young specimen is chiefly noteworthy in showing the double 

 row of marginals much more clearly than the adult. In the inter- 

 brachial arc there are about a dozen small plates interpolated be- 

 tween the two series. The papular areas are sharply limited hj the 

 superomarginal plates, there being no intermarginal or actinal 

 papulae. The same is true of the adult. What appear to represent 

 the inferomarginal plates (in the young specimen) is a series of 

 roughly elliptical or oval plates adjacent to the adambulacrals. 

 Closely apposed to these is a similar series representing the supero- 

 marginals, but separated from them in the interbrachial arc. Im- 

 mediately above the superomarginals the irregular mesh-work skele- 

 ton begins, so that there is really no other interpretation possible for 

 these plates unless the superomarginal series is wanting. About 

 every fourth or fifth superomarginal bears a stout conical spine, and 

 about every fourth inferomarginal a similar spine, but the spines of 

 the 2 series are not exactly opposite; they may even alternate. (See 

 pi. 122, fig. 5.) Just external to the mouth plates and wedged between 

 them and the first inferomarginal of each series is a prominent un- 

 paired actinal intermediate plate bearing a spine. A rudimentary 

 plate is present on either side of this. The presence of these plates 

 pretty well establishes the identity of the inferomarginals. In the 

 adult several additional plates are present on either side of the odd 

 plate forming short series which do not extend beyond the sixth or 

 seventh adambulacrals. 



Type-locality. — Solomon Islands. 



Distribution. — Solomon Islands; Celebes; Sulu Archipelago; 

 xVndaman Islands (Koehler). 



SpeciTTiens examined. — Three : 



Station 5138, vicinity of Jolo. 19 fathoms, sand and coral; 1 

 specimen (young). 



Ligpo Point, Balayan Bay, Luzon; 1 specimen (adult). 



T'na Una Road, Binang Unang Island, Gulf of Tomini, Celebes: 

 1 specimen (large). 



