SPEROSOMA OBSCURUM. 201 



The tri'phyllous pedicellariae are abundant everywhere. The necks are 

 long and slender, often three times as long as the head, and the stalks 

 (PI. 65, fig. 8) may be twice as long as the neck or even longer. The 

 valves (PI. 65, figs. 11, 12) are somewhat variable in form and proportions ; 

 they are one-third to one-half a millimeter in length, and the tip may be 

 rather abruptly truncate, and in width considerably more than half the 

 length, or it may be more rounded and in width less than half the length. 

 The cover-plate is perforated but is only slightly developed. 



The sphceridia (PI. 65, fig. 13) are rather large and occur well up on to 

 the abactinal side. The calcareous plates (PL 65, fig. H) in the tube-feet 

 are rather small but fairly abundant. 



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

 the specimens ranging from 20 to 220 mm. in diameter : 



Station 3824. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 Bott. temp. 49.5°. 222-498 fathoms. Co., r., brk. sh. 



Station 3865. Between Maui and Molokai, H. I. Bott. temp. 44.8°- 

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



Station 3979. Off Modu Manu, H. I. Bott. temp. 54°. 222-387 

 fathoms. Fne. wh. s., for., r. 



Station 3988. Off Hanamaulu, Kauai, H. I. Bott. temp. 40°. 165- 

 469 fathoms. Gy. for., s., p. 



Station 4015. Off Hanamaulu, Kauai, H. I. Bott. temp. 41.2°. 318- 

 362 fathoms. Gy. s., r. 



Station 4021. Off Hanamaulu, Kauai, H. I. Bott. temp. 44°. 286- 

 399 fathoms. Co. s., for. 



Station 4025. Off Mokuaeae Point, Kauai, H. I. Bott. temp. 44.9°. 

 275-368 fathoms. Fne. gy. s., brk. sh., for. 



Station 4036. Off Kawaihae Light, Hawaii, H. I. Bott. temp. 38.2°. 

 687-692 fathoms. Fne. dk. gy. s., for. 



Station 4089. Off Mokuhooniki Islet, Pailolo Channel, H. I. Bott. 

 temp. 43.8°. 297-304 fathoms. Fne. gy. s. 



Station 4096. Off Mokuhooniki Islet, Pailolo Channel, H. I. Bott. 

 temp. 45.3°. 272-286 fathoms. Fne. gy. s. 



Station 4112. Off Lae-o Ka Laau Light, Molokai, H. I. Bott. temp. 

 40.5°. 433-447 fathoms. Fne. s. 



Station 4117. Off Kahuku Point, Oahu, H. I. Bott. temp. 45.6°. 

 253-282 fathoms. Co. s., for. 



