248 Bulletin Vanderbilt Marine Museum, Vol. VI 



examination of the entire series, in search of the varietal char- 

 acters designated by Doderlein (1887) and Mortensen (1928) for 

 galapagensis, failed to establish any evidence these characters 

 are constant in the present specimens. Some of the Lower Cali- 

 fornia specimens and some of the Galapagan specimens have un- 

 usually thick, club-shaped spines exclusively, while others have 

 both very thick primaries and slender primaries on the same ani- 

 mal, and have also the typical interporif erous zone of E. thoimrsii. 

 The Conway Bay specimen of the "Alva" expedition has a fairly 

 abundant series of large globiferous pedicellariae, which do pos- 

 sess a distinct limb on the stalk. Some of the West Mexican speci- 

 mens also have the same type of pedicellariae. Curiously some of 

 the West Mexican specimens, having typical thouarsii characters 

 in other respects, possess large globiferous pedicellariae with no 

 distinct limb on the stalk, such as is described for variety gcUd- 

 pagensis. 



References : For full description of this species and early litera- 

 ture, see Boone, L., Bull. Vanderbilt Mar. Mus., vol. IV, 1933, 

 p. 126, pis. 80 and 81. 



For discussion of variety galapagensis, consult: Doderlein, L., 

 Cidaris (Eucidaris) galapagensis; Doderlein, L., Jap. 

 Seeigel I, Cidaridae, 1887, p. 20, taf . IX, 3a-d, X, figs. 1-14.— 

 Mortensen, Th., Monog. of Echinoidea, I. Cidaroidea, 1928, 

 p. 399, pis. 42, fig. 13, pi. 86, figs. 8-10. 



Genus: PRIONOCIDARIS A. Agassiz 

 Prionocidaris baculosa variety annulifera (Lamarck) 



Plates 79 and 80 



Type : Lamarck's type series came from the seas of New Hol- 

 land and Kangaroo Island (Australia). His specimens are de- 

 posited in the Paris Museum. 



Distribution : The typical form of baculosa is more abundant 

 in the western Indian Ocean, while the variety annulifera has its 

 center of distribution farther east in the Malay Archipelago. It 

 has been reported from Java, the Philippine Islands, Moluccan 

 Seas, northward to the Bonin Islands and Japan and westward 

 to western New Guinea, Ceylon, western Australia from the 

 Abrolhos Islands, and on the African coast from Mozambique. 

 The "Alva" specimens establish a new record for it. 



