REPORT ON THE ECHINOIDEA. 189 



extremity it runs slightly arching to the apex, where it suddenly drops again to the anal 

 snout, which extends beyond the general outline, forming a sharp beak with the convex 

 curve extending from the actinostome to the abactinal edge of the anal snout. The spines 

 within the subanal fascicle form a prominent tuft, as they are somewhat more closely 

 packed than on the rest of the test (PI. XXIII. fig. 2). The arrangement of the large 

 tubercles within the peripetalous fasciole in this genus is not like that of Macroioneustes, 

 but it closely resembles that of some species of Metalia, and in that genus we find a very 

 marked tendency to form a subanal beak in the area limited by the very prominent 

 subanal fasciole. In Bvissopsis this snout or l)eak, as well as the development of the 

 pi'imary tubercles, is reduced to a minimum, while the genus (Brissopsis) still retains the 

 more cylindrical outline and the sunken anterior ambulacrum of Cionohrissus ; while in 

 some species of Metalia with the other features are associated a flattened actinal surface 

 as in SjKitangus proper. 



Station 191. September 23, 1874. Lat. 5° 41' S., long. 134° 4' E. ; 800 fathoms ; 

 bottom temperature, 3 "9° C. ; mud. 



Brissopsis {Hemiaster) . 

 Brissopds, AgassLz, 1840, Cat. Syst. Ectyp., p. 16. 



Brissopsis luzonica. 



Kldnia luznniea, Gray, 1851, Ann. Mag. Nat. Hist., vol. vii. p. 133. 

 Brissopsis luzonica, A. Agassiz, 1872, Revis. Ech., part 1, p. 95. 



De Loriol has also united, as I have done, Toxohrissus (Kleinia of Gray) with Brisso2'>sis. 

 Loven, however, still retains Kleinia on account of the slender connection of the peri- 

 petalous and of the subanal fasciole ; this, as I have shown elsewhere, does not seem to be 

 of generic value. 



Station 168, July 8, 1874. Lat. 40° 28' S., long. 177° 43' K; 1100 fathoms; 

 bottom temperature, 2'0° C. ; grey ooze. 



Station 188. September 10, 1874. Lat. 9° 59' S., long. 139° 42' E. ; 28 fathoms; mud. 



Station 191. September 23, 1874. Lat. 5° 41' S., long. 134° 4' E. ; 800 fathoms; 

 bottom temperature, 3 "9° C. ; mud. 



Station 203. October 31, 1874. Lat. 11° 7' N., long. 123° 7' E. ; 12 to 20 fathoms ; 

 mud. 



Station 232. May 12, 1875. Lat 35° 11' N., long. 139° 28' E. ; 345 fathoms; 

 bottom temperature, 5'0° C. ; sandy mud. 



Brissopsis lyrifera. 



Brissm lyrifer, Forbes, 1841, Brit. Starf., p. 187. 



Brissopsis lyrifera, Agassiz, Des., 1847, C. R. Ann. Sc. Nat., vol. viii. p. 15. 



I am unable to distinguish specimens of this genus collected at Station 142 from 



