14 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.8 



Oral shields and adoral plates completely concealed by the broad and 

 numerous oral papillae. By removing the papillae the oral shield is found 

 to be triangular, acutely pointed within, with slightly concave margins, 

 distal margin truncated and raised to a median, rounded ridge that bears 

 one short, heavy, rounded, tapering, blunt spine. Adoral plates large, 

 roughly triangular, larger than the oral shields, barely meeting within ; a 

 proximal swollen ridge bears the 2 exceedingly wide, fan-shaped, distal 

 oral papillae. Jaw plates long and rounded, meeting only proximally and 

 bearing 2 rows of oral papillae, outer and inner rows; outermost papilla 

 on the jaw plate is the 3rd and last fanlike mouth papilla. Twelve oval 

 oral papillae on each side, arranged in 2 distinct rows, one on the margin 

 of the jaw and the other within the margin of the jaw plate. The mar- 

 ginal row of papillae from the outer to the apical is as follows : outermost 

 very broad, flat, fan shaped, longer than broad, largest of the row; next 

 3 fan shaped, flat, longer than wide, diminishing in size to the apex of the 

 jaw; next 3 short, rounded, tapering to a blunt point. Apical papillae 

 short, rounded, and bluntly pointed. Inner row of oral papillae 6; the 

 distalmost exceedingly broad and fan shaped, only slightly longer than 

 wide; next 3 flat, spatulate, 3 times as long as broad. Proximal 2 narrow, 

 rounded at the tips, short, only slightly longer than the corresponding 

 outer row of papillae. Four flat, broad, rounded teeth, widely spaced. 

 No tooth papillae. 



Interbrachial spaces below densely covered with scales, some bearing 

 spines. Two long, narrow, genital slits bordered by long, wide, genital 

 plates, parallel to each other, obliquely set at arm base. Under arm plates 

 hourglass shaped, longer than wide, lateral margins concaved by the large 

 tentacle pores; produced median ridge bearing tentacle scales. Tentacle 

 scales, 3 pairs on 1st 3 arm segments. One long, narrow tentacle scale on 

 the side arm plate and 2 median flat, oval, fan-shaped tentacle scales 

 attached to the under arm plate. Next 4 arm segments with 4 pairs of 

 tentacle scales, attached to the under arm plate, outer 2 oval and fan 

 shaped, inner 2 long, paddle shaped, narrow, and pointed. Three pairs of 

 tentacle scales on succeeding 7 arm segments, inner 2 pairs long and nar- 

 row, outer one oval and acutely pointed; succeeding 12 segments bear 2 

 tentacle scales, an oval outer and a long thin inner scale; near the ex- 

 tremities only one narrow, pointed, tentacle scale. 



Color. — In life, disk grayish blue with a dull yellow stripe in each 

 interradius; arms pale orange, lighter at base and orally. Dried speci- 

 mens are nearly white, but the disk has an evident bluish tinge. 



