22 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Stereocidaris Pomel. 

 Stereocidaris grandis Dod. 



Stereocidaria grandis Dod., 1887. Jap. Seeigel, p. 3. Pis. I; II, figs. 1-11 ; VIII, fig. 2. 



Plates 5, figs. 18-20; 33 and 36. 



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

 Hawaiian Islands. In the Japanese specimens the primary radioles are 

 more slender and comparatively longer than in the Hawaiian specimens, 

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

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

 specimens the actinal 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 mm. to 39 mm. in diameter. All of the 

 different kinds of pedicellariog are present in this species and quite common. 



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 pedicellariae are frequent on the interambulacra and are often found 

 singly at the inner angles of the coronal plates. 



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

 usually, broad and widely separated at the base, only meeting near the tip ; 

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

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

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

 tinal side of the test. 



The small globiferous ])edicellarit\; (PI. 5, fig. 19) are much like the large 

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

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

 abundant everywhere. 



This species was taken at the following localities. 



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

 Bk. s. sh. 



Station 38.31. OlT Lae-o Ka Laau Light, S. coast of Molokai. Bott. 

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



