1869.] 389 [Verrill. 



Radius of disk to that of arms as 1 : 9 or 10. 



Disk large and thick, the interradial regions swollen and a smaller 

 lobe bordering ea,ch side of the arms at base; upper surface and iijter- 

 radial spaces below covered throughout with small, closely crowded, 

 rounded or slightly polygonal granules; radial shields not visible; at 

 the base of each arm a few naked, imbricated, unequal scales. Mouth- 

 shields broad-cordate, broader than long, the inner end obtusely 

 rounded, the sides slightly incurved, the broad outer end emarginate. 

 The accessory plates outside the mouth-shields either two and nearly 

 equal, or three and uneqnal, in the same specimen; when there are 

 two they form together a narrow, slightly oblong ellipse, much 

 narrower than the mouth-shields; when there are thi-ee, the middle 

 one has a broad, rounded triangular form, and the two lateral pieces 

 are small, unequal, and irregular in size and form. Mouth-papillas 

 seven or eight on each side of the mouth, the inner one elongated, 

 irregularly oval, somewhat pointed ; the next much larger than the 

 others, broader than long, somewhat quadrilateral and irregular, the 

 outer edge nai-rower and flattened; the third a little longer than the 

 fii'st, irregular in form, somewhat pointed at each end; the three or 

 four following are a little smaller, and about equal in size and similar 

 in form, rather oblong, somewhat irregular and wedge shaped, the 

 outer edge being flattened, those toward the centre a little shorter; 

 these are frequently followed by a small rounded one, which is some- 

 times wanting; the last one is short and rounded. The narrow space 

 between the mouth-papillae and mouth-shields is covered with small 

 rounded granules, except about opposite the first, where the side 

 shields are partly ex^josed. The teeth have been much injured, but 

 there appear to be five, which are stout, broad, the lower ones some- 

 what squarish, with rounded angles when seen from above, the end 

 flattened or wedge-shaped, truncate or bevelled. The arms are well 

 rounded, stout at base, regularly tapering to the ends, but not be- 

 coming slender. Under arm-plates eight sided, slightly overlapping, 

 the first eight or ten broader than long, followed by a number that 

 are as long as broad, the length gradually increasing, so that at the 

 twenty-fifth plate the length is decidedly greater than the breadth. 

 Inner tentacle-scales oblong, shorter than the arm-plates, toward 

 the disk very broad and stout, truncate, farther out gradually be- 

 coming more slender and pointed; outer tentacle-scale very short 

 and broad, about half as long as the inner; those at the base of 

 arms broader than long, the inner side and outer end nearly rec- 



