4 PROCEEDINGS OF THE INTATIOl^AL MUSEUM vol. 78 



Salaverry, Peru, October 18, 1926, three specimens, 

 Clark gives a full description and figures. These specimens were 

 taken well within the known range. 



HELIASTER CANOPUS Perrier 



Eellaster canopus Peerieb, Rev. dos Stellerides, 1875, p. 88. — H. L. Clabk, Bull. 

 Mus. Comp. Zool., vol. 51, 1907, p. 45, pi. 3, fig. 2 ; pi. 8, fig. 7. 



Juan Fernandez, December 8, 1926, eight specimens. 



The largest example has R, 72 millimeters and 21 rays. Clark, 

 who gives a full description and figures, records 60 millimeters as 

 being the maximum among his 27 specimens. 



HELIASTER POLYBRACHIUS Clark 



Heliaster polyhrach'ms H. L. Clark, Bull. Mus. Cnmp. Zool., vol. 51, 1907, p. 54, 

 pi. 2, fig. 2 ; pi. 7, fig. 12 ; pi. 8, fig. 8. 



Talara, Peru, August 29, 1926, two specimens. 



As Clark points out, this is the mainland form of 11 . cuiningii 

 (Galapagos Islands). Reference should be made to Clark's paper 

 for description and figures. 



ASTROSTOLE PLATEI (Meissner) 



Text Figures 2, 2a 



Asterias {Coscinasterkis) platei Meissner, Arcliiv f. Naturgesch., 1896, p. 103, 



pi. 6, fig. 2. 

 Astrostole platei Fisher, Bull. U. S. Nat. Mus. 76, part 2, 1928, p. 130. 



Seven rays, some incomplete ; no label, but in container with four 

 specimens of Heliaster cmiojjus; hence from Juan Fernandez. 

 Material in poor condition. 



Meissner has given a good figure of this species which is a typical 

 Astrostole. The type is eight-rayed. Inner furrow-spine tapered, 

 shorter and slenderer than outer, which is slender with truncate 

 tip, but not tapered. Three series of prominent ventro-lateral 

 spines, longer than adambulacrals and with flattened, rounded or 

 truncate tips, often shallowly gouge-shape. Inner of these three 

 series are actinals, the other two inferomarginals. They form also 

 oblique transverse combs, the base of outer spine carrying prominent 

 bouquet of crossed pedicellariae. 



Superomarginal spines about the same length, usually on alternate 

 plates; a very irregular series of acicular carinal spines between 

 which and superomarginals are irregularly spaced similar dorsolat- 

 erals corresponding to about two series on either side — all with 

 conspicuous wreaths of crossed pedicellaria?., about 0.4 millimeter 

 in length (figs. 2, 2a). Straight pedicellariae slender-lanceolate, rare 

 except on furrow face of adambulacrals. Superomarginals with 

 conspicuous area of tiny hyaline bosses. 



