■1* 



THE OPriIURID-/E. 



147 



* 



part slightly restricted. Side mouth shields very short and wide, triangular, 



not meeting within. 



First ventral plate short, polygonal ; those beyond about as long as wide, 

 the two-three inner ones^ however, a little longer than the rest. They have 

 all the inner angle truncated, outer edge concave, outer corners rounded, 

 outer laterals almost straight, inner ones a little re-enteringly curved. Side 

 arm-plates with spine-ridge little prominent. As usual in Amjyhmra, the 

 side arm-plates of each two adjoining joints are separated by a naked space, 

 which is very distinctly seen also from the dorsal side. The dorsal plates 

 are almost egg-shaped in the inner part of the arm, farther out they become 

 more transversely oval, and towards the end of the arm they again become 

 egf>'-shaped ; they are in mutual contact almost to the end of the arm. The 

 inner ones are a little longer than wide, farther out they are somewhat wider 

 than lon^^ and towards the end of the arm they are almost equally wide 



and long. 



The disk is partly naked ; round the radial shields there is a broad 

 band of small, but distinct, rounded, overlapping scales ; in the central part 

 of the disk there are only some few irregular, spread scales, between which 

 the naked skin is seen; and along the margin there is a completely naked 

 band. The primary plates not distinct. The radial shields are narrow, 

 elongated, with outer ends just meeting, inner ends separated by more 

 small scales. Outside the radial shields there is a little naked space, sepa- 

 rated from the naked band along the margin of the interbrachial spaces by a 

 few scales, in continuation of those around^ the radial shields. A rather 

 deep but very narrow incisure in the median hue between the outer end 

 of the radial shields. Under side of the disk wholly naked. 



Six, on the inner joints seven to eight arm-spines, the upper one about 

 half the length of an arm-joint, then they gradually increase in length down- 

 wards, the lowest being a little longer than a joint. They sometimes are a 

 little widened at the end. Two small tentacle scales, making a right 

 angle with each other, though not in the typical manner, as in A. Ghiajd 



Forbes. 



Color in alcohol : dark gray. 



One specimen from Station 3353, 695 f. 



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