376 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



wider than long, the second to sixteenth longer than wide, thence 

 wider than long. Marginal plates slightly convex, the last 4 to 6 

 rather conspicuously so and the granules instead of being flat-topped 

 are convex, and conspicuously larger on the middle of plate than 

 borders. On the other marginal plates the 1 to 3 marginal series of 

 granules are slightly smaller than the rest. Proximally a few inter- 

 marginal papulae. 



Actinal intermediate plates very regular, forming transverse series 

 as well as longitudinal. Series adjacent to adambulacrals rectangu- 

 lar, wider than long, and reaching to within 3 or 4 marginal plates 

 of tip of ray. Secondaries composed of square plates about two- 

 thirds as large as those of first series and extending three-fourths 

 length of ray. Third series reaching one-fourth length of ray, com- 

 posed of about 6 or 7 plates. Two intermediate plates correspond to 



1 inferomarginal. Two series of actinal papular pores. Actinal 

 granules increasing in size toward furrow. On proximal half of 

 ray there are rather abundant granuliform, 2- or 3-jawed pedicel- 

 lariae, from 2 to 5 times the diameter of adjacent granules, and up- 

 ward of 10 to a plate (inner intermediate series). Figures will give 

 a better idea than description of these pedicellariae. 



Adambulacral plates a little wider than long. Furrow spines 3 

 on proximal half of ray, usually 2 on distal half, rather heavy, blunt, 

 the median of 3 untapered, the laterals sometimes slightly tapered. 

 Subambulacral spines 2, the aboral frequently slightly the longer, 

 both shorter and heavier than the furrow spines. Near the tip of 

 ray, the aboral spine only reaches any size. External to these is a 

 series of 3 or 4 large granules, then usually an irregular series of 

 several small granules. In the first series there are frequently 1 or 



2 pedicellariae, with sometimes a third external to these. In such an 

 event each jaw of a pedicellaria, in a way, replaces a granule. 



Mouth plates with an unpaired sharp, slightly curved tooth at the 

 inner angle (a pair on 1 plate) and 4 or 5 similar toothlike spines 

 along the straight furrow margin. There are usually 2 similar sub- 

 oral spines, all by their difference of form contrasting with the first 

 adambulacral spine. 



Madreporic body circular, situated its own diameter distant from 

 inner border of marginal plates. 



Type.—QdX. No. 32637, U.S.N.M. 



Type-locality. — Station 5146, vicinity of Siasi, Tapul Group, Sulu 

 Archipelago, 24 fathoms, coral sand, shells; 1 specimen. 



Distribution. — Known only from type-locality. 



Remarks. — The exact status of this form is difficult to determine, 

 owing to there being but one specimen. It differs from F. japonica 

 and F. monilis in having regular, uniform superomarginals, not 

 alternately large and small ones. F. monilis has but 1 subambula- 



