466 PEOF. p. M. DUNCAN ON SOME 



project much. ; but its vertical dimensions are considerable, and 

 the plates are separated by skin. The spines project at right 

 angles to the arm from the free edge, and are short, stout, flattish, 

 constricted at their attachment, swollen in the middle, and bluntly 

 pointed. Near the disk there are six spines, the upper and lower 

 ones projecting upwards and downwards respectively, and the 

 others regularly radiating. The longest, which is either the third 

 or fourth from above, is about the length of the upper arm-plate. 

 Lower down the arm there are four spines, and three at its end, 

 whose tips are less projecting. 



There is one tentacle-scale, which is large, rounded, and flat, 

 situated on the side arm-plate; and the tentacles are very 

 long. 



The colour of the disk is slaty, and of the arms reddish brown 

 with lighter-coloured under arm-plates. The disk is ^^ to ^ inch 

 long, and the arm is about ten times as long. They are stout, 

 broad, and much curved. 



Locality. Korean seas. Collected by Capt. St. John, E.N. 



In the British Museum. 



Amphitjea koee^, sp. nov. Plate X. figs. 18, 19. 



The disk is flat above, tumid, and constricted in the interbra- 

 chial spaces and rather thick ; and the arms are broad, not much 

 more than twice the length of the diameter of the body, arched 

 above, flat below, and furnished with three small spines and two 

 tentacle-scales. The upper surface of the disk is covered with 

 scales of several sizes ; there is a small rosette of middle-sized 

 scales, and there is much small scaling in the interbrachial 

 spaces, and the scaling of the lower part is equal and not very 

 fine. 



The radial shields are small, much longer than broad, and are 

 completely separated by three disk-scales. 



The mouth-shields are heart-shaped, longer than broad, rounded 

 and longer without, very angular and pointed orally, with out- 

 wardly curved inner edges. The side mouth -shields are large, 

 united, and thick at their inner edge, long, broad, and triangular, 

 broader towards the lower arm -plate, and much in contact with 

 the mouth-shield. The jaws are small, short, thick, close and 

 straight ; there are six mouth-papillse on each angle, and an upper 

 sharp tentacle-scale on either side. The two papilla beneath the 

 teeth are large, lumpy, and blunt, rectangular in shape, with the 



