22 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Stereocidaris Pomel. 

 Stereocidaris grandis Dod. 



stereocidaris grandis Dud., 1887. Jap. Seeigel, p. 3. I'ls. I; II, figs. 1-11 ; VIII, fig. 2. 



Plates 5, figs. 18-JO ; 33 and 36. 



The " Albatross " collected Slereocidaris grandis both in Japan and in the 

 Hawaiian Islands. In the Japanese specimens the 2:)riinary radioles are 

 more slender and comparatively longer than in the Hawaiian specimens, 

 and are slightly pointed. The lateral serrations of the flattened aetinal 

 primary radioles are also marked in some cases, while in tlie Hawaiian 

 specimens the aetinal radioles are cylindrical and blunt. 



A note by the collector with the specimens from Station 4044 states that 

 " the test is pale olive gray, the long spines a still paler muddy gray and 

 the secondary spines at the base of the primary radioles pale green." The 

 specimens collected vary from 8 nun. to 39 nun. in diameter. All of the 

 different kinds of jjedicellaria? are present in this species and quite conunon. 



The large globiferous pedicellaria3 (PI. 5, fig. is) have the valves short 

 and stout with a large opening and no end-tooth; they measure about 

 .75 mm. in length, while the stalks are usually shorter and have no limb. 

 These pedicellarias are frequent on the interambulacra and are often found 

 singly at the inner angles of the coronal plates. 



The tridentate pedicellaria3 (PI. 5, fig. 20) generally have the valves un- 

 usually broad and widely separated at the base, only meeting near the ti[); 

 sometimes, however, they are narrow and compressed and only slightly 

 separated near the base. The valves are about 1.25 nun. in length, while 

 the stalk is somewhat shorter. They are found almost wholly on the ae- 

 tinal side of the te.st. 



The small globiferous pedicellariie (PI. 5, fig. 10) are much like the large 

 ones, but the margins are straighter. The valves are only about .40 nuu. 

 in length while the stalk is from one to three times as long. They are 

 abundant everywhere. 



This species was taken at the followiug localities. 



Station 3749. Off Suno Saki, Sagami Bay, Japan. 83-158 fathoms. 

 Bk. s. sh. 



Station 3831. Off Lae-o Ka Laau Light, S. coast of Molokai. Bott. 

 temp. 45.1°. 178-201 fathoms. Br. m, co, s. r. co. 



