"BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 13. AFD. IT. N:0 5. 71 



now before me answers tolerably wcll to the description and 

 ligiire qiioted, but better still to the description and figure 

 given by Jeffrey Bell^) as of a form [i of S. globatrix 

 Agass. and afterwards declared by him to be the true S. glo- 

 batrix 2). Another speciraen, from Moreton Bay, is identical, 

 onlv all the tiibercles are distinctlv larger. Biit neither of 

 the two shows a trace of the peculiar colonring so eonspicuous 

 in the Linnean specimen of the S. sphaeroidcs, and 1, therefore, 

 leave to another day — and to others — to decide on their 

 relations. 



The Salmacis sulcata Agass., with the angnlar pits eon- 

 nected by the transverse canals of the sutures Avhich are in- 

 tercepted by the primary tnbercles, seems to find a more con- 

 venient place in the genus Temnoplevirus Agass. If I am 

 not mistaken it is described by Alex. x^Vgassiz under S. glo- 

 batrix^), and by Jeffrey Bell as form a of that species*). 



In all the species described the basis is more or less 

 pulvinated; the primary tnbercles, decreasing above the am- 

 bitus, assume again towards the top a rather prominent form; 

 in the intcrradia tlieir row is, at the ambitus, the second, 

 third or fourth from the zona, and iipwards the two rows 

 become conspicuously parallel, even as if tending to diverge, 

 while the ambulacral ones converge, always bordering the zona. 

 On the ventral side the tnbercles are considerablv larofer and 

 more equal, and the spines stronger, siibspatulate, and, as 

 generally, annulated. As in other Temnopleuridae the calvci- 

 nal system often presents, in the suture between two costals 

 and the radial, a pit like the angular ones of the areae; in 

 some specimens, particularly iu yovmg ones, it is distiuct, in 

 others obscure or wanting. This may be seen in Temnopleu- 

 rus toreumatieus, Microcyphns foliatus, Amblypneustes ovum, 

 Salmacis sphaeroides, S. globatrix. 



There is great confusion among the species of this c-euus. 

 Without venturing wpon any decision I here subjoin the de- 

 scriptions of fonr species which seem to hold good: 



M Proceed. Zool. Soc. 1S80. p. 48.3. t. XIJ. f. 2, 3. 8. 



*) Proceed. Linn. Soc. N. S. Wales, IX, p. 50.5. 



') Revision, p. 473. 



*) 1. c. p. 433, t. XLL f. 1, 7. 



