112 BRISINGIDAE. 



Freyellidea oligobrachia,' sp. nov. 

 Plate 6, fig. 3, 4. 



Rays 6. Disk 10 mm. across. Rays all broken but certainly more than 

 90 mm. long and probably in excess of 100. Disk moderately high but flat, 

 covered with relatively large, thick, irregular plates which more or less overlap; 

 the largest are about .75 mm. in diameter and carry as many as fifteen spinelets; 

 spinelets very small with one, two, or three glassy terminal points ; around anus 

 the spinelets are noticeably coarser ; there are a few small pediceUariae scattered 

 among the spinelets. Rays rather stout, about 4 mm. wide at base, and 3 mm. 

 near middle; genital area not sharply defined, about 20 mm. long and only 

 4.5 mm. wide, where widest; its covering is very siinUar to that of the disk, 

 except that spinelets are fewer and pediceUariae much more numerous; beyond 

 genital area, the plates disappear quite rapidly. 



Adambulacral plates long and slender, the distal end curved inward slightly, 

 its inner corner prolonged into a long slender peak; armature, of a single spine 

 about 3 mm. long, which is located on aboral end of plate on actinal surface, and 

 is normally covered with thick skin, densely clothed with pediceUariae; at base 

 of ray these spines have flat, expanded, dentate tips but these rapidly give way 

 to simple points and distaUy the spines are very acicular; there is no furrow- 

 spine and no pediceUariae in the fvirrow. Inferomarginal spines small, acicular, 

 completely skin covered hke the actinal spines, which they seldom equal in 

 length and never exceed; basally they occur at irregular intervals of 2-4 adam- 

 bulacral plates but distaUy they are more regular and seem to accompany every 

 other actinal spine. Tube-feet rather smaU, lying against the distal cm'ved end 

 of adambulacrals. Oral plates small, squarish, little swollen; on actinal surface 

 at distal end is a long, clavate spine covered with skin and numerous pedicel - 

 lariae; at adoral outer corner of plate are two or three slender spinelets lying 

 horizontally and each carrying a few pediceUariae. There is no spinelet at distal 

 outer corner of plate but there are a few pediceUariae in the furrow at that point. 

 Color, in alcohol, nearly white. 



Station 4656. Eastern Tropical Pacific, 6° 54' 36" S., 83° 34' 18" W., 2,222 fms. Bott. temp. 35.2°. 



Fne. gn. m., mang. nod. 

 Station 4742. Eastern Tropical Pacific, 0° 3' 24" N., 117° 15' 48" W., 2,320 fms. Bott. temp. 34.3°. 



Fne. It. gy. glob. oz. 



Three specimens. 



• dXlyos = few + ^paxlojp = arm, in reference to the number of rays, the mlDimum for the genus. 



