370 Annals of the South African Museum. 



Primary spines decidedly longer than test-diameter, or if shorter, with purple 



spots or lines at base. 



Primary spines with purple spots or longitudinal lines, conspicuous on the 

 base or "neck" ..... Prionocidaris baculosa. 



Primary spines with light-colored, unspotted neck Stereocidaris capensis. 



EUCIDARIS METULARIA. 



Cidarites metufnria Lamarck, 1816. Anirn. s. Vert., vol. 3, p. 56. 

 Eucidaris metularia Ddderlein, 1887. Japan. Seeigel, p. 42. 

 Cidaris tuehi/uria A. Agassi/, 1873. Rev. Ecli.. pi. Ig, fig. 1. 



Although Mr. Agassiz lists this species from the Cape of Good 

 Hope, on the strength of specimens in the British Museum, there is 

 little doubt that the locality label for these old specimens is not to 

 be trusted. Neither the CHALLENGER nor any of the other expeditions 

 which have collected at the Cape have met with this species there, 

 nor has it been taken by the PIETER FAURE. There are five speci- 

 mens in the collection of the South African Museum but they were 

 taken at Mo/anibique, by K. H. Barnard, along shore. There is no 

 evidence to warrant the belief that this sea-urchin occurs very much 

 to the south of that point. 



PRIONOCIDARIS BACULOSA. 



Cidarites baculosa Lamarck, 1816. Anim. s. Vert., vol. 3, p. 55. 

 Prionocidaris baculosa Mortensen, 1909. GAUSS Ech.. p. 50. 

 Phyllacanthus baculosa A. Agassiz, 1873. Rev. Ech., pi. If, figs. 4, 5. 



There is in the collection a small specimen of this well known 

 Indo-Pacific species, which was taken by Mr. Barnard at Mozambique, 

 the most southerly point on the African coast, whence baculosa is 

 known. This specimen is only 23 mm. in diameter, with the longest 

 primaries a trifle more. The "necks" of the primaries show clearly 

 the longitudinal purple lines. 



It is of great interest to find in the PIETER FAURE collection two 

 large primary spines (50-55 mm. long and 4-6'5 mm. in diameter) 

 which show the characteristic purple lines of this species. They are 

 undoubtedly from an individual identical with the small specimen 

 from Mozambique. They are more or less water-worn or at least 

 have that appearance and have undoubtedly been transported a long 

 distance by some agency ; for they were dredged in 25 fms. on a 

 bottom of broken shells, two miles off the Umtwalumi River, Natal, 

 hundreds of miles south of the known range of baculosa. They bear 

 the reference no. 12466. It is possible they were carried by a fish. 



