9,30 I- I'TIMA AXD S. IKEDA. 



dependent, npon fhv ])Ocnli:ir hoi-izontal cnrvatnre of the arms ])eannnf 

 tlu'Hi, and that tlieir shape would be similar to that of the dorsal or 

 of the ventral wel), should the boundini»" arms dis])ose themselves 

 res])ectively like tlie dorsal or the ventral arms, what is likely to 

 happen not unfreqnently during life. 



Tlie suckers and cirri show ari arrangement as in 0. A<jassi.:ii. 

 The former, arranged in a single row to each arm, number 42-52 as 

 fir as can be counted, the greatest number being f )und on the ventral 

 arms. Tliey are on the whole very small. Along the greater part of 

 the arms, they are of about the same size, but do gr.adually though 

 shghtly decrease in size both proximally and distally, bec(iming 

 es])eciallv smaller towai-ds the tips of the arms. Unlike <>. Jijassizii, 

 those situated about halfwny along the arms are not any siiiallci- 

 than those Avhi<'h précède or follow them. The suckers have simple 

 hollows, their edges lieing generally but little prominent above the 

 surface of the skin. 



The cirri, present in two rows on each arm and alternating with 

 its suckers are very inconspicuous structures, being small, slender and 

 attemiated to a point. Those towards the tip and also those close to 

 the base of the arms are especially insignificant, being reduced to mere 

 minute prominences. Thev commence proxiin;illy l)etween the first 

 aiid the second suckers. The space enclosed l)etvveeri the two rows of 

 cirri is broadest halfwav alono- the arm and narrows toAvards either 

 end of it. > 



The colour, as observed on the second day after the specimen liad 

 been j)ut into weak alcohol, was predominantly madder-red. On the 

 superior surface, the head and body were somewhat uniforndy of that 

 colour, but very dull in tone, except in the region just aho^e the eyes 

 and the under surface of the fins, where they were poor or altogether 

 wanting in pigment. On the periphery of the superior surf ice ihe 



