lOO VERRILL 



mostly stand two to a plate, are tapered, subacute or obtuse, but 

 not striated at tip. 



Large major pedicellariae occur in the naked channels between the 

 upper and lower marginal plates, especially proximally; these are 

 compressed in a dorsal view, but long-ovate or lanceolate in a side 

 view, not serrate. These are more than half as thick as the adjacent 

 spines ; others of much smaller size, but similar in form, occur on the 

 interradial areas below, and along the margin of the grooves. The 

 minor pedicellariae are very small and occur both on the spines and 

 on the papular areas. 



This species may belong with Marthasterias rather than with 

 Pisaster. More specimens are needed. Perhaps larger specimens 

 would have more rows of interactinal plates. 



Genus Marthasterias Jullien. 



Asterias (pars) Gray, Sladen, Bell, etc. 



Marthasterias Jullien, Bull. Zool. Soc. France, 1878, p. 141. Type, M. 



foliacea=^ M. glacialis (Mull.). 

 Stolasterias, subgenus (pars), Sladen, op. cit., 1889, pp. 563, 583. 

 Stolasterias (restr.) Perkier, Exped. Trav. et Talism., pp. 108, log, 1894. 



Monacanthid, five- or six-rayed Asteriinae, with few definite radial 

 rows (usually three) of stout dorsal ossicles and large spines. One 

 row of small or rudimentary actinal plates, usually without spines. 

 Upper and lower marginal plates large, with long spines. See also 



P- 47- 



MARTHASTERIAS (?) SERTULIFERA (Xantus) Verrill. 



Asterias sertulifera Xantus, Proc. Acad. Nat. Sci. Philadelphia, i860, p. 568. 

 Ives, List Cab. Stearns, p. 2, 1890. De Loriol, Recueil Zool., Suisse, 11, 

 1887. 



Rays five, subangular. Radii, about 1:5; diameter, about 112 mm. 

 Adambulacral spines in one row, very slender, flattened. Ventral 

 spines in two or three rows, stouter, blunt, and flattened. Upper 

 marginals regular, one spine to each alternate plate. Dorsal spines 

 similar, stout, cylindrical or tapered, in three pretty regular rows, all 

 bearing dense wreaths of minor pedicellariae near their tips. Major 

 pedicellariae few. (Xantus.) 



Cape St. Lucas (Xantus) ; San Diego (Ives, 1890) ; California 

 (De Loriol). 



I have had no opportunity to study well preserved examples of this 

 species, and therefore refer it to Marthasterias with doubt. 



