ASPIDODIADEMA MEIJEREI. 97 



Bathymetrical range, 165-800 fathoms, but averaging considerably over 

 400 fathoms. 



Extremes of temperature, 45.6°-37.5°; average temperature, 41.6°. 

 One hundred and sixty-four specimens. 



Aspidodiadema meijerei A. Ag. and Cl. 



Aspidodiadema nicobaricum var. meijerei Doderlein, 1906. Echin. Deutsch. Tiefsee- 

 Exp., p. 165. 



Aspidodiadema meijerei A. Agassiz and Clark, 1907. Bull. M. C. Z., L, p. 235. 



Plates 44, figs. 3 and 4. ; 58; figs. 7 and 8. 



There is nothing of importance to add to the descriptions and figures of 

 the pedicellariae, etc., given by de Meijere (1904) and Doderlein (1906), as 

 the Hawaiian specimens before us agree in all essentials with those collected 

 by the '' Siboga " and *' Valdivia." The stout tridentate pedicellariae, however, 

 occur in only a very few individuals. 



One of the specimens from Station 3839 was deformed by the presence of 

 five parasitic gasteropods (Stylifer ?) on or near the abactinul system. The 

 hypertrophy of some of the genital and ocular plates (PI. 58, fig. 8) is 

 very marked, and with this is associated a notable increase in the number 

 of slender spines upon those plates, which are further remarkable for their 

 very light (nearly white) color (PI. 58, fig. 7). 



This species was taken by the " Albatross " at the following stations : 



Station 3817. Off Diamond Head, Oahu, Hawaiian Islands. Bott. temp. 

 73.5°. ? 320 fathoms. Crs. lav. co. s. sh. 



Station 3818. Off Diamond Head, Oahu, H. I. Bott. temp. 44.3°. 293- 

 295 fathoms. Fne. co. s. bk. sp. 



Station 3836. Off Lae-o Ka Laau Light, Molokai, H. I. Bott. temp. 48°. 

 238-255 fathoms. Br. gy. m. s. 



Station 3839. Off Lae-o Ka Laau Light, Molokai, H. I. Bott. temp. 46.3°. 

 259-266 fathoms. Lt. br. m. s. 



Station 3865. Off Mokuhooniki Islet, Pailolo Channel, H. I. Bott. temp. 

 44.8°.-45°. 256-283 fathoms. Fne. vol. s. r. 



Station 3914. Off Diamond Head, Oahu, H. I. 289-292 fathoms. 

 Gy. s. m. 



Station 3918. Off Diamond Head, Oahu, H. I. Bott. temp. 44.5°. 257- 

 294 fathoms. Wh. s. m. 



