CLARK: THE ECHINODEKMS OF PERU. 335 



be distinguished. Adambulacral armature consists of a marginal series of 3 

 (rarely 4) stout, blunt spines (about 1 mm. long) of which adoral is usually 

 smallest and aboral largest ; surface of plate with half a dozen (4-7) somewhat 

 similar but slightly smaller spines, arranged in pairs or trios. Oral plates small, 

 each with a marginal series of four spines, more or less expanded at tip and a 

 single blunt spine on surface of plate. Madreporic plate very inconspicuous, less 

 than 2 mm. across and only 4-5 mm. from center of disc. Color (dry) uni- 

 form, light yellowish brown. 



There are two specimens of this well-characterized species in the M. C. Z. col- 

 lection, which were taken at Talcahuano, Chile, by the '* Hassler " expedition. [ 

 have been in doubt as to their real relationship, but as they are more nearly allied 

 to Sladen's Patina bellula than to any other starfish with which I have compared 

 them, I consider them congeneric with that species. Fisher (1908) has shown 

 that Patiria is untenable and has proposed Parasterina as a substitute. 



Phataria unifascialis. 



Linckia (Phataria) unifascialis J. E. Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 285. 

 Phataria unifascialis W. P. Sladen, 1889. Kept. voy. " Challenger," 30, p. 786. 



Plate 5, figure 1. 



This common and well-known Panamic species, which ranges as far north as 

 the Gulf of California, has been recorded by Verrill (1867) from Zorritos, Peru, 

 and doubtless occurs on the northern coasts of that country although not met with 

 by Coker. But the record from Timor (v. Martens, 1866, p. 85) is probably based 

 on an erroneous identification, while de Loriol's (1900) specimen from Celebes 

 can scarcely have been collected originally in the East Indies, though it may have 

 been taken to Europe from there. Museum specimens of this species are usu- 

 ally yellowish or grayish in color, but we have no information as to color in life. 

 From the appearance of the best dry specimens, the living animal was probably red 

 of some shade. The largest specimens have R = 125 mm. and also = 9r. 



Pharia pyramidata. 



Ophidiaster (Pharia) pyramidatus J. E. Gray, 1840. Ann. Mag. Nat. Hist., 6, 



p. 284. 

 Pharia pyramidata W. P. Sladen, 1889. Kept. voy. " Challenger," 30, p. 784. 



Plate 5, figure 2. 



Like the preceding, this is a common Panamic species, known to range from 

 the Gulf of California to Zorritos, Peru, but not met with by Coker. Leipoldt 

 (1895) records two specimens from Valparaiso, but there is little reason to doubt 

 that, if the specimens are correctly labeled, they were brought to that city 

 from the north. Large specimens of Pharia have R = 150-160 mm. and also 

 = 5.3-7,5r. The color of preserved specimens is dull purplish or reddish brown, 

 often more or less yellowish along the ambulacral furrows. Verrill (1867 p. 288) 



