SALMACIS DUSSUMIERI. 473 



Salmacis Dussumieri 



! Salmacis Dussumieri Agass., 1846, C. R. Ann. Sc. Nat, VI. 



PL VIIF.f. 7-8. 



The outline of this species is quite different from any other in the 

 genus ; the test is flattened, somewhat pentagonal from above, and at 

 first glance recalls Temnopleurus Keynaudi, having very much the same 

 coloration. It has, however, no pits, but simply small sutural pores. Gray 

 has established for this species the genus Toreumatica, but I cannot agree 

 with him in maintaining it even as a subgenus of Salmacis. None of the 

 specimens I have examined carry spines. The actinostome is small, with 

 short, rather sharp cuts deeply sunken. The whole actinal surface 

 carries large uniform tubercles, which diminish very rapidly in size from 

 the ambitus to the actinostome, separated by horizontal rows of miliaries 

 closely packed, and also miliaries in the median space. The abactinal sys- 

 tem resembles that of S. sulcata ; the genital ring is narrow, and one or two 

 of the ocular plates are in contact with the anal system. 



Above the ambitus the median interambulacral space is bare, and is flanked 

 near the poriferous zone by one principal vertical row of large primary tu- 

 bercles ; the rest of the coronal plate having from two to three secondaries, 

 and a few miliaries irregularly scattered over it. Near the ambitus there are 

 three vertical rows of primaries on each side of the median line, the row 

 immediately adjoining the poriferous zone extends some way towards the 

 abactinal pole. There are in the ambulacral space two outer primary rows 

 of tubercles next the poriferous zone ; the median space is bare, with few 

 scattered miliaries, except near the ambitus, where there are two or three 

 additional short vertical rows of primaries. 



Abartiual Actinal No, of 



Diameter. Height. System. System. Coron. Plates. 



44. 19. 9.1 10. 25. 



41. 18. 8.8 9. 25. 



China Seas. 



Salmacis globator 



! Salmacis globator Agass., 1846, C. R. Ann. Sc. Nat., VI. [PL XXXVIII. f. 23. 



This species is interesting as forming a transition between Salmacis and 

 Temnopleurus, showing these two genera to be much more closely related 

 than would appear from the comparison of such extreme forms of each as 



