CLARK: THE ECHINODERMS OF PERU. 341 



and they are not A. laerulisra, but they are not well enough preserved to make it 

 clear whether they are squamata or pugetana. It seems better, for the present, to 

 consider thcin the latter. ^ 



Amphiodia grisea. 



AmphipbjUs griseu A. Ljungman, 1867. (jfv. Kongl. Vet.-Akad. Forh., 23, p. 31-3. 

 Anijihiodia !/risea A. E. Verrill, 1899. Trans. Conn. Acad., 10, p. 313. 



No one has met with this species since its original description, which was based 

 on a specimen from Guayaquil, Ecuador. It will probably be found on the north- 

 ern coast of Peru. The type has the disc 7.'i mm. across and arms 35 mm. long. 



Amphiodia chilensis. 



Ophiolepis chilensis J. Miiller and F. Troschel, 1843. Arch, f.' Naturg., 9, bd. 1, 



p. 120. 

 Amphiodia chilensis A. E. Verrill, 1890. Trans. Conn. Acad., 10, p. 313. 



Plate 9, figure 1. 



Originally described as from "Chili," this species has since been taken at Tal- 

 cahuano by the " Hassler " expedition and at Calbuco by Plate. It is probably a 

 southern species and its occurrence on the coast of Peru is doubtful. The adult 

 has the disc 10-12 mm. across, and arms 70-100 mm. long. 



Hemipholis gracilis. 



A. E. Verrill, 1867. Trans. Conn. Acad., 1, p. 262. 



This is a Panamic species, of which Ljungman had a specimen from Guayaquil ; 

 otherwise it is not known from south of Panama. Ljungman (1867) described 

 his specimen as Heniipholls affinis, but Verrill's name has about two months' pri- 

 ority and has beeu generally accepted. In adult specimens the disc is 5-6 mm. 

 across, and the arms iO-50 mm. long. The color is given by Verrill as light 

 greenish gray (in alcohol), the arms banded with whitish; radial shields green; 

 beneath white. 



Ophiactis kroyeri. 



C. F. Lutken, 1856. Vid. Med. f. 1856, p. 24. 



Plate 9, figure 3. 



This is the one well-defined, characteristic brittle-star of the Chile-Peruvian 

 region. It has, however, been recorded from the Hawaiian Islands, and if its oc- 

 currence there is confirmed, its distribution is very remarkable, for unlike the star- 

 fisii, Mifhrodia bradlri/i, which also occurs in the Hawaiian group, this Ophiactis 

 is not otherwise known from north of the equator. On the South American coast 

 between Payta, Peru, and Talcahuano, Chile, kroyeri appears to be very common. 

 It is a small species, adults being about 6 mm. across the disc, with arms lS-20 mm. 

 long, and the color is inconspicuous, reddish or purplish brown. Dr. Coker 



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