416 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



row series. Usually, however, they are bent upward and form a 

 group. 



Mouth plates with a marginal series of 8 or 9 spines, increasing 

 very gradually in size toward the innermost, and all united by mem- 

 brane. On the outer part of the plate is a suboral fan of 5 or 6 

 spines on a slight eminence. These stand parallel to the margin ad- 

 jacent to first adambulacral, and the inner end of the series bends 

 inward toward the median suture, sometimes inclosing a single spine. 



Madreporic body situated just external to the ring of raised apical 

 plates and with 2 spines on the convex irregularly pitted surface. 



Type.—Q^t. No. 37036, U.S.N.M. 



Type-locality. — Ulugan Bay (near mouth of Baheli River) 

 Palawan Island, 2 to 5 feet, mud, sand, seaweeds. 



Distribution. — Known only from the type-locality. 



Remarks. — The following differences are observable between 

 Asterina coronata cristata and A. coronata eu/t'ces. 



Asterina coronata cristata. 



N'onprominent abactinal plates with 

 usually only 5 to 10 spinelets on the 

 radial region of ray. 



No abactinal pedicellarlae. 



Actinal plates adjacent to adambu- 

 lacral plates with 2, 3, or 4 spinelets 

 (regularly 4 on cotype, which has R, 

 25 mm.) 



Furrow spines usually 6. sometimes 7. 



Subambulacral spines 4, the 2 me- 

 dian much enlarged (in the cotype 5 

 or 6, the 2 median enlarged). 



Marginal mouth spines o. 



Asterina coronata eurces. 



Nonprominent abactinal plates with 

 usually 10 to 15 spinelets on the radial 

 region of ray. 



Numerous abactinal spiniform pedi- 

 cellariae. 



Actinal plates adjacent to adambu- 

 lacral plates with 4, 5, or 6 spinelets — 

 usually 5. 



Furrow spines 8, sometimes 9. 



Subambulacral spines 6, the 2 me- 

 dian not so much enlarged as in 

 cristata. 



Marginal mouth spines 8 or 9. 



Genus PATIRIELLA Verrill. 



Patiriella Vebrill, 1913, pp. 480, 483. Type, A.<iteriiui regnlaris Verrill. 



PATIRIELLA EXIGUA (Lamarck). 



Plate 109, figs. 3, 4. 



Asterias exigua Lamarck, 1816, p. 554. 



Aster-ina exigun Pekrier. 1875, p. 302. — Koehler, 1910a, p. 129, pi. 9, figs. 6 

 and 7. 

 Notes on Philippine specimens. — The largest example has the fol- 

 lowing dimensions: R=20 mm., r=14 mm. There are a consider- 

 able number of six-rayed specimens, and a very few four-rayed. 

 The papulae are restricted to the disk and a rather broad petaloid 

 area on the radii comprising about a dozen longitudinal series. On 

 the interradial line the papulae extend a little more than one-half r 

 toward the margin. Outside the papular area the plates carrj' 7 to 10 

 relatively coarse, thimble-shaped granules in a group. On the papu- 



