268 APPENDIX. No. IX. 



spaced. The dorsal ossicles present a regular rectangular 

 arrangement ; and the interspaces, which are very small and 

 are occupied by a single papula, form, in consequence, regular 

 longitudinal and transverse rectilineal series. From each 

 intersection springs a small subquadrate group of from three 

 to five short dorsal spines, amongst which are placed one or 

 two pedicellariae. Towards the sides the pedicellarige are more 

 numerous. The spine groups are regularly disposed in longi- 

 tudinal and transverse lines, those of the middle row being 

 more densely packed than the others, thereby forming a more 

 or less distinct median line down each ray. The spinelets are 

 of equal length, and, being closely set, give a smooth velvety 

 appearance to the starfish. From the apices of the spinelets, 

 which are broader than the bases, proceed three or four small 

 denticles. 



Only three specimens of this Stichaster were obtained in 

 Franklin Pierce Bay, and were quite young individuals, the 

 largest measuring 16 millims. in its largest diameter. A 

 much finer example was dredged at Proven on the outward 

 journey, in which the diameters of rays and disk were respec- 

 tively 30 millims. and 6 millims. 



Crossaster papposws (Linck), Miiller and Troschel. 1 



Coll. Feilden: Discovery Bay, 25 fms., hard bottom; 

 Cape Frazer, 80 fms. ; Franklin Pierce Bay, 15 fms., bottom- 

 temperature 29°-5 Fahr. 



Coll. Hart: Franklin Pierce Bay, 13-15 fms. 



1 The genus Solaster of Forbes included the two starfishes known as 

 Asterias encleca, Linn., and A. papposa, Fabr. (Linck). The morpholo- 

 gical differences of these forms are such, however, as to necessitate their 

 being regarded as representatives of two distinct genera. Confining, there- 

 fore, Forbes's Solaster to his own type (S. encleca), Miiller and Troschel's 

 genus Crossaster (synonym of Solaster, Forbes, published a year later) is 

 naturally assigned to the Asterias papposa type, Gray's designation Poly- 

 aster having been appropriated by Ehrenberg (Pohjasterias) at an earlier 

 date. The propriety of the above limitation was suggested by Dr. Liit- 

 ken so far back as 1857. (Of. < Vidensk. Meddelelser/ 1857, p. 35. 



