VetTill, Notes o?i Racliata. 293 



Whether the Hood's Ishmd referred to be the one in the Galapago 

 Group, hearing that name, is somewhat uncertain. 



In the character of the dorsal spines and the much longer rays, his 

 description differs widely from our specimen. 



Stichaster aurantiacus VoniU. 



Asterias aurantiacus Meyen, Reise um die Erde, 1834. 

 Stichaster striatus Miill. and Trosch., Wieg. Arch., vi, B. ii, p. 323, 1840. 

 Tonia atlantica Gray, Ann. and Mag. Nat. Hist., vi, p. 180, Nov., 1840. 

 Asteracanthion aurantiacus Mull, and Trosch, Systemder Asteriden, p. 21, 1842. 



Numerous specimens of this species were obtained by Mr. Bradley 

 at Callao, Peru, on rocks at low-water mark. It has also been 

 described from Chili. 



Its color in life, according to Mr. Bradley, is bright orange ; dried 

 specimens are dull yellow. 



The following species, which was omitted in its proper place, on 

 page 272, following X. tesselata, is inserted here chiefly on account of 

 the peculiar interest connected with its geographical distribution. 



Ludia BellonSB Liitken, Kritske Bemserkn., Vidensk. MeddeleLser, 1864, p. 133. 



Two specimens, apparently identical with this species, were collected 

 at Callao, Peru, by Mr. Bradley. The specimen described by Dr. 

 Ltitken was believed to have come from Guayaquil. If this be true, 

 it is the only instance known to me of a species of starfish common 

 to the Peruvian and Panamic faunae, except Heliaster Gumingii, but 

 neither of these have been found at Panama. 



Our largest specimen, preserved in alcohol, has a greater radius of 

 3*7 inches; lesser, '5. Another dried specimen is about half as large. 

 The five rays are narrow, more convex than usual in this genus, 

 scarcely depressed, the edges not thin. Interambulacral plates bearing 

 three spines (occasionally but two) the inner one slender and shorter 

 than the others, curved, the outer one stoutest, straight, a little longer 

 than the middle one. Ventral plates bearing very small, slender, 

 papillary spines, and a transverse row of about five large blunt ones, 

 increasing in size to the margin, the longest about equal to the outer 

 ones on the interambulacral plates. The paxillae of the upper surface 

 are unequal in size, the large ones are arranged in transverse rows of 

 about six on each side of the rays, and bear a short, blunt spine in 

 the middle, surrounded by 8 to 12 very small, shorter radiating papil- 

 lae. Smaller paxillae are scattered among these and also occupy the 

 disk and middle of the rays. 



Color, in alcohol, yellowish, mottled with dark brown above. 



