CLARK: THE ECHINODERMS OF PERU. 331 



ion that de Loriol's specimens from Mazatlau were not the true bellonae, and 

 he therefore names them lorioli. I am not able to agree with this view, for it 

 seems that the characters by which he attempts to separate the two forms are 

 unreliable, and de Loriol's description and figures appear to agree very well with 

 Peruvian specimens. 



Dr. Coker took small specimens (R = 100 mm. ±) of this species "off north- 

 east side of San Lorenzo Island "• (which is off Callao) in " about 2^ fathoms," 

 on February 5, 1907 ; and also " with dredge and trawl, Bay of Sechura, west of 

 Matacaballa; about 5 fathoms in depth, April 8," 1907. The Bay of Seehura is 

 just north of Aguja Point. Nothing is recorded of the habits of bellonae. 



Luidia Columbia. 



Petalaster Columbia J. E. Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 18.3. 



Luida iessellata C. F. Liitken, 1859. Vid. Med. f. 1859, p. 40. 



Petalster columbiae A. E. Verrill, 1867. Trans. Conn. Acad., 1, p. 272. 



Luidia colombiae E. Perrier, 1876. Arch. Zool. Exp., 5, p. 253. 



Luidia columbiae W. P. Sladen, 1889. Kept. voy. " Challenger," 30, p. 247. 



Plate 1, figure 2. 



This is also a very large starfish, for while most of the known specimens have 

 E, = 100-200 mm., there are much larger specimens in the M. C. Z. collection 

 from ^lagdalena Bay, Lower California. The largest of these has E,= 275 mm., 

 and the breadth of the arms at base is 38 mm. The color of preserved specimens 

 is yellowish green, brownish green, or dull greenish gray above, and yellowish 

 beneath. Dr. Coker's field notes show that in life the animal is " dorsally of a 

 mouse color with many dark specks. Below yellowish white." This seems to be 

 one of the most common starfishes of the Panamic region, and one that is widely 

 distributed. It ranges from Magdalena Bay, Lower California, and the Gulf of 

 California to northern Peru, and has also been reported from the Galapagos Islands. 

 Specimens in the Coker collection were taken with L. bellonae in the Bay of Se- 

 chura, on April 8, 1907, and with Astropecten erinaceus at Capon, January 29, 

 1908. The habits are reported by Coker to be like those of the Astropecten {q. v.) 

 with which it is found. 



Tosia verrucosa. 



Goniodiscus verrucosus R. A. Philippi, 1857. Arch. f. Xaturg., 36, Bd. 1, p. 132. 

 Pentagonaster (Astrogonium) verrucosus E. Perrier, 1878. Nouv. Arch. Mus. Hist. 



Nat., (2) 1, p. 84. 

 Gnathaster (1) verrucosus W. P. Sladen, 1889. Kept. voy. "Challenger," 30, p. 750. 



To judge from Philippi's account, this starfish would appear to occur not rarely 

 on the coast between Valparaiso and the Rio Maipu, yet strangely enougli it does 



1 This is the way the name lias been written for many years, but there is no 

 reason wliy Gray's original spelling should not be retained. 



