282 MR. S. P. BEDFORD ON MALAYA^ ECHtN'ODERMS. [Mar. 20, 



report, to differ considerably in depth, and the area iu question 

 appears to represent the shallow-water margin of the distributional 

 area of E. acutus which overlaps the centre of distribution of 

 E. esculentus. 



Two of the specimens collected approach very close to "typical " 

 S. alexandri in the more uniform character of their tuberculation, 

 their deeper sutural furrowings, and their general facies ; and t 

 seems to me that the two forms represent extremes of a continuous 

 series, the "norm ''of which differs in different localities (cf. 

 Loven). Dr. Loven places this species in the genus Temno- 

 pleurus, but I cannot see sufficient differences to warrant its 

 generic separation from the other Salmacis ; the bare median 

 spaces containing the sutural pits, and referred to by Dr. 

 Doederlein, are very obvious in the living animal. The colour of 

 the spines is for the most part dark violet, with the base and tip 

 often cream-coloured (cf. Duncan & Sladen). 









Measurements 









)iaiu. 



Height. 



Calyx. 



Peristome. 



Percentage 

 H. 



I values : 

 O. 



D=100. 

 P. 



50 



31 



7-5 



13-5 



62-0 



15-0 



27-0 



59 



35 



8-0 



14-5 



59-3 



13-6 



24-6 



61 



35 



10-5 



13-5 



57-4 



17-2 



22-1 



7. Salmacis globator Bell (*? L. Ag.). (Plate XXII. figs. 4 a, b.) 



Salmacis globator, F. J. Bell, Proc. Zool. Soc. 1880, p. 431 

 (S. globator |S). 



? 8. sulcatus, Sladen, Journ. Linn. Soc, Zool. xiv. p. 439, 1879. 



References. F. J. Bell, Proc. Linn. Soc. N.S.W. ix. 1885. 

 S. Loven, Bih. K. Svensk. Vet.-Ak. Handl. Bd. 13, Afd. 4, 

 No. 5, 1887. 



Locality. Singapore. 



Habitat. The test of this species together with those of 

 S. sulcata are frequently found washed ashore on the east side of 

 Singapore Island ; unfortunately when collecting I did not re- 

 cognize that the two species were distinct, so that I do not know in 

 what proportions they occur; they live in considerable abundance 

 from between tide-marks up to about 10 fathoms on a muddy 

 bottom. The synonymy of this, as indeed of all the species of 

 Salmacis, is in a state of the greatest confusion. Prof. Bell (loc. cit. 

 1880) described it as Salmacis globator (ft) ; some years later (loc. 

 cit. 1885) he expressed the opinion that it was identical with 

 Louis Agassiz's S. globator, and he then renamed Alex. Agassiz's 

 S. globator, Salmacis alexandri. Dr. Loven does not admit that 

 S. globator (&) Bell is Louis Agassiz's species, but, on the other 

 hand, unites it with S. rarispina of the latter author. It is quite 

 impossible from the meagre description in Agassiz and Desor's 

 ' Catalogue Raisonne ' to arrive at any conclusion as to the 

 species they intended ; it seems better therefore, for the sake of 



