&STEROIDEA "I NORTH PACIFIC AND ADJACEN1 WATERS FISHER Xii 



Bpinelets appear to be relativelj larger than they actually are when compared din 

 with pedicellariae "f typical Forma erxbraria. A pedicellaria attached oder 



Bpinelel has the appearance of being larger than when attach d to a -pin. -In ,"h t,, [00 

 per cent thicker. 



I I I I v- i I- llrandc, 



- 



Bull, a i. 



The specimens upon which the following account i- based i ndt's 



original material. I >. .c*. ir Mortensen kindly loaned a dried example • by 



ill.' Copenhagen Museum in L871 ami furnished |>h. >:< >Lrr.-q>]i> <>f another specimen 

 representing Brandt's varietj chia." (PI. 28 Later, Dr. A. 



Djakonov, of the Academy of S.i.n.-.'s. Leningrad, sent fi is in alcohol 



which .'in' of particular value, since ii i- possible to determine that the gonads i 

 ventrally. The largest of these examples in size and detail i~ closely similar to 

 l'latr 2s, I-'iu'ni'' - Doctor Djakonov writes that the museum pi 

 with many alcoholic specimens and some dried ones all labeled by Brandt himself. 

 No actual type appears to have been indicated. I am especially indebted to D< 

 Djakonov for the donation of this matt rial, which is now in the United S 

 National Museum. Aside from it- scientii c value it po I historic int. 



for anyone concerned with the zoology of the north Pacific. 



/' Rays Eve; R 40 mm., r '.» mm. R Mr K ", r. Brandt); 



breadth of ray at base, in ii mm. Abactinal spines small; well-spaced, cylindrical 

 or clavate (with a differentiated irregular carina! series interspersed with abundant 

 triangular straight pedicellariae; raj normally rounded, the marginals close together 

 and lateral in position; a single scries of superomarginal I pro.ximally somen 

 twoi, inferomarginal, and actinal spines larger than the abactinals, and formii 

 bristling lateral and ventrolateral armature; superomarginal and inferomarginal 



plates of adult specimens connected in series 1>\ a -mailer intermediate os-icle; 

 adambulacraJ plates with proximally two, then one (or with alternately one and I 

 -pines; abundant lateral and actinal straight pedicellariae. 



/'- a ■' " The abactinal surface of the disk and rays i- beset with small 



cylindrical or clavate. minutely thorny and usually terminally grooved spu 

 div.rs sizes, varying from about 0.5 to 0.7 mm, in length by mm. in 



1. read tli. Smaller Bpinelets measuring 0.35 to 0.5 mm. l.>n<_ r by about 0.1 nun. in 



thickness are much less numerous, and are found toward the end of the ray, or one 



or two may accompany the .oar-.- Bpinelets (PI. 12, figs. '■'■> and l | The Bpines 



are fairly well spaced, varying in this respect as -how n hy the liirures, and the carina! 



as i- differentiated as an irregular line. As in most forms of Leptasteriai the 

 dorsal spines increase in length from the carinals toward the superomarginals. 



Abactinal skeleton (pi. 12, ti<_ r an irregular, open, reticulum, the primary 

 irregularly three and four lobed plates being connected bv elongate intermediate 

 ossicles. 



