NO. 1944. XEW GENERA AND SPECIES OF STARFISHES— FISHER. 621 



j^ressed and pointed, in a regular comb with a nearly straight distal 

 margin. Superambiilacral spinules 10 to 12, very slender, terete, 

 pointed, in 3 irregular longitudinal series, or in 1 series of 5 near the 

 furrow and the otiiors without very definite order, the size grading 

 from those of first series which are nearly as long as the furrow 

 spines, to the outer, which are subequal to tlie actinal intermediate 

 spinelets. Some of the proximal plates have fasciculate pedicellarise 

 mth 3 to 5 shortened, sharp, spiniform jaws. 



TRITONASTER EVORUS, new species. 



R = 31 mm., r = 7 mm,, R = 4.4 r; breadth of ray at base, 7.5 mm. 

 Rays pointed, fairly stout, very evenly tapering from narrow base; 

 interbrachia abruptly rounded; abactinal integument thin, slightly 

 inflated; paxillse small, largest on borders of paxillar area, to whicli 

 the papula? are confined; marginal plates massive; superomarginals 

 forming a tumid border to paxillar area, each with a small conical 

 upright spine; inferomarginals with very tumid outer ends bearing, 

 proximally, 2 curved parallel combs of setalike spines (one covering 

 the other) and, distaUy, 1 such comb; adambulacral plates with 3 

 long furrow, and 12 to 15 delicate subambulacral spines, the latter 

 often forming fasciculate pedicellarise. Differing from T. craspe- 

 dotus in the much larger, tumid superomarginals, smaller paxillaj, 

 double proximal combs of lateral spines, fewer adambulacral spines 

 and fewer enlarged teeth. 



Ty^e.— Cat. No. 30529, U.S.N.M. 



Type-locality. — Station 5476, off southeastern end of Luzon (vicin- 

 ity of San Bernardino Strait), 270 fathoms, fine sand; bottom tem- 

 perature, 48.3° F. 



The paxillse are rather low parapaxillse, the summit of the tabu- 

 lum being convex and narrower than the base. The larger paxillae 

 have 1 to 4 central, delicate, minutely thorny spinelets and 6 to 9 

 peripheral, while the small ones have 1 to 3 central and 5 to 8 periph- 

 eral. Superomarginal plates, 24 to a ray, are, unlike those of cras- 

 pedotus, robust to the end of the ray, and are so shaped that they 

 form a raised angular or tumid border to the paxillar area. The 

 plates are wider than long, and each has a lateral and a dorsal face, 

 the latter being about square, and the former longer than high 

 beyond the basal fourth of ray. The general surface of plate is cov- 

 ered with well-spaced, tiny, upright spinelets, ver}^ fine about the 

 borders of the plate and gradually becoming thimble-shaped at the 

 center. On the lateral face of many plates are 1 or 2 small fascicu- 

 late pedicellarise with about 6 tiny spinelets for jaws. The fascioles 

 between the plates are very rudimentary. The inferomarginals 

 have a very convex outer end, which defines the ambitus and bears 

 a perpendicular, curved comb of delicate setalike spines. On the 



