70 



20 falhs. and S. of Koh Kahdat, 8—10 falhs. Further Iwo medium-sized specimens 

 were found in the Museum from the Gulf of Siam (Salmin). The „Skeat "-Expedi- 

 tion took one large specimen off the East coast of Redang. 



Even the smallest of the specimens (5 mm.) are perfectly recognizable by 

 their pedicellaria? and the colour of the spines; in regard to the colour they are 

 very similar to dussumieri, from which species they may, however, easily be disting- 

 uished by the globiferous pedicellariæ. (The alternation of the primary ainbulacral 

 tubercles in S. (hissuinieri is not seen in quite small specimens.) — In these small 

 specimens there are, of course, only the two series of primary tubercles in each 

 area; at a size of about 10 mm. a second, inner row of tubercles appears at the 

 ambitus in the interambulacra; the pits are very distinct in the smallest specimens. 

 The genital openings appear at a size of c. 9 mm. diameter. 



Salmacis conica v. Martens is a synonym of this species. Dr. Meissneb has 

 kindly sent me the specimen (a naked test) from the Berlin-Museum, so that I can 

 say with full certainty that it is identical with the typical form of S. virgulata. 



The var. Alexandri (Bell) agrees completely , as regards pedicellariæ and 

 spicules, with the typical form of uirgulata. 



10. Salmacis sphaeroides (L.). 



I'l. V. Kig. 23. PI. VI. Figs. 1, 11, 41. 



Echitiiis sphœioides Linné. 1758. Systeraa naturæ. Ed. X. p. 664. 



— — — 1764. Museum Ludovicæ Ulricæ. p. 706. 



Salmacis mihatits. L. Aüas.siz & Dbsor. 1846. Catalogue raisonné d. Ech. p. 359 (55). 



— fcsthms. Gri;iîe. 1868. 45. .lahresber. Scliles. Gesellsch. vaterl. Cultur. p. 43. 

 sulcata. Agassi/.. 1872. Rev. of Ech. p. 476. 



— — — 1881. Challenger Ech. p. 114. 



— — Studer. 1881. Echinoidea ges. von „Gazelle", p. 873. 



— splueroides. Loven. 1887. Echinoidea descr. by Linnæus. p. 69. PI. II. 



— rurispina. de Lorioi.. 1893. Échinod. de la Baie d'Amboine. p. 370. 



— — KoEHLER. 1895 Échinod. îles de la Sonde, p. 413. 



— ulolidlor. Bedford. 1900. Echinod. from Singapore and Malacca p. 282. I'l. XXII. 4. a. b. 



— splueroides. Dödkhlkin. 1902. Echinoidea von Amboina ii. Thursday Isl. (Senion) p. 710. 



Taf LXIII. 1-4. 



— — DE Meijere. 1904. Siboga-Echinoidea. p. 82. Taf. XVII. 272. 



This species has been definitely settled by the researches of Loven and 

 DÖDERLEIN. That it is the same as S. sulcata Ag. can scarcely be doubted. In the 

 Muséum d'histoire naturelle in Paris no type-specimen is preserved, but in the col- 

 lection of l'École des mines there is a specimen from the Philippine Islands (with- 

 out further indications) named Salm. sidcata: this is then probably a type-specimen. 

 It is certainly S. sphceroides; with regard to pedicellariæ and spines it also com- 

 pletely agrees with that species. 



