APPENDIX. 351 



Tosia tubercularis, n. s. 



Yellow, edge reddish. 



The dorsal ossicules convex, subtubercular, those of the 

 centre of the arms highest, those between the arms in the 

 centre largest, nearly flat. 



The marginal ossicules f or J- on each side, convex 

 subtubercular ; the one near the tip of the arm largest and 

 oblongs longitudinal^ convex. 



The ossicules of the oral surface small, each surrounded 

 with a single row of granules. 



Var ? or Young ? The ossicules of the oral surface near 

 the edges covered with granules. 



Inhab. — Swan River. 



There is a specimen in the British Museum with six 

 marginal ossicules, very like the above, but differing from 

 them in the dorsal ossicules being only convex and rounded. 

 It has the same convex and large subterminal marginal plate. 



Tosia rubra, n. s. 



Red brown. 



Dorsal ossicules rather convex rounded. 



Marginal ossicules -J£ on each side, rather convex equal, 

 the one next the tip of the arms smaller, narrower. 



The ossicules of the oral surface flat-topped, with a 

 single series of marginal granules. 



Inhab. — Australia. 



Tosia australis. Gray, Ann. Nat. Hist. 



Yellowish or reddish. 



Dorsal ossicules rather convex rounded. 



Marginal ossicules f on each side, rather convex equal : 

 The ossicules of the oral surface flat-topped, with a single 

 series of marginal granules. 



Inhab. — W. Australia, Swan River. 



