72 



The var. pyramidata (Troschel) completely agrees with the typical form of 

 sphceroides in regard to pedicellariæ and spicules, and to the spicules of the genital 

 organs. (I have examined the type-specimen in the Berlin-Museum.) 



The var. belli Döderlein, on the other hand, is something quite different. 

 The pedicellariæ agree exactly with those of S. hicolor, even in the tridentale pedi- 

 cellariæ a reliable difference can scarcely be pointed out; there can be no doubt 

 that it is very nearly related to that species, whereas it has nothing to do with 

 sphceroides. According to Döderlein (in a letter to me) it must be maintained as 

 a distinct species; the most easily seen character of it is the green base of the 

 spines; other characters of little importance may be found in the test (comp. 

 Döderlein's description, p. 718). The buccal membrane contains very numerous 

 bihamate spicules; the plates opposite the gills are covered with pedicellariæ, as 

 are the buccal plates. 



11. Salmacis dussumieri Ag. 



PI. VII. Fig. 15. 



Salmacis dussumieri. Agas.siz & Desor. 184C. Catalogue rais. des Échinides. p. 359 (55). 

 Torctimatica concni'a. Gray. 1855. An arrangement of the fam. of Echinidæ. Proc. Zool. Soc. p. 'M). 

 Stilmacis itttsxumieri. A(;a.ssiz. 1872. Rev. of Ech. p. 473. PI. VIII. b. Figs. 7— 8. 



— — Bell. 1880. On some Genera and Species of Temnopleuridæ, p. 429. 



— — Ramsay. 1885. Catalog. Echin. Austral. Mus. I. p. 16, 49. 



— hictcu. DÖDKHLEiN. 1885. Seeigel von Japan u. d. Liu-Kiu-Inseln. p. 22. 



— dussumieri. Lovkn. 1887. Echinoidea descr. by Linnæus p. 73. 



— — Duncan & Sladen. 1888. Echinoidea of the Mergui Archipelago, p. 317. 

 Teninopleurus Reijncntdi'l Bedford. 1900. Echinod. from Singapore and Malacca, p. 281. 



Salmacis dussumieri. Döderlein. 1902. Echinoidea von Amboina ii. Tliursday Isl. (Semons Reisen), 

 p. 715. Taf. LXIII. Fig. 5—5. c. 



— snlcalii. Bell. 1903. Report on a Collection of Echinodernis from the Neighbourhood of Zan- 



zibar. Part. I. Ann Nat. Hist. 7. Ser. XII. p. 247. 



— <lussumicri. de Mkmehe. 1904. Siboga-Eehinoidea. p. 85. 



This species differs so much from the other Sa/macis-species, through the 

 low form of the test, the deeply sunken peristome, and especially by having a 

 primary tubercle only on every second ambulacral plate (which character has first 

 been distinctly pointed out by Lovén, loc. cit., though Bell's expression: „when 

 there are vertical rows of tubercles on each half of the ambulacral plates, the tu- 

 bercles do not form transverse rows, but are set alternately" (loc. cit.) may mean 

 the same) that very little uncertainty has prevailed as regards it. To the descriptions 

 in the works cited 1 may only add that the colour of the large spines at the ambitus 

 varies rather much, from almost white with a few red rings at the outer end to 

 intensely red in the whole length, with the rings at the outer end almost ob- 

 scured. In such dark s[)ecimens also the small ])rimary spines of the abactinal side 

 are red, whereas in the light coloured specimens these spines are quite white. {A 



