362 s. GOTO : 



regenerated. In the interbrachial arc the superomarginals slant 

 down gradually from the abactinal surface towards the inferomar- 

 ginals, so that here they present only one curved surface towards 

 the outside ; but as they proceed further out in the arms an edge 

 gradually becomes apparent, and near the middle of the arms, 

 there is a distinct outer, as distinguished from the abactinal, 

 surface to each superomarginal, the angle between the two surfaces 

 becoming a right angle a little further out than the middle of 

 the arms. Sometimes however the superomarginals of the inter- 

 brachial portions stand erect, presenting only an outer surface. 

 The superomarginals are uniformly and thickly covered over with 

 fine gi'anules which are shghtly better spaced near the inner mar- 

 gin of each plate. There are numerous small pedicellarise of some 

 height on the superomarginals, similar in size and shape to those 

 of the abactinal plates. In the interbrachial region there may be 

 as many as three or four pedicellariae on each plate, but they 

 decrease further outwards, becoming rare in the distal half of the 

 arms, although their occurrence is subject to some variation. The 

 pedicellarise appear to occur more fi-equently nearer the margins 

 of the superomarginal plates rather than near the centre. In 

 some of the arms which have evidently regenerated, the supero- 

 marginals of the two sides are in direct contact with each other 

 for a short distance near the tip of the arms. 



Inferomarginals. — In the interbrachial arcs the inferomarginals 

 usually project outwards shghtly more than the superomarginals, 

 but become more and more flush with them in the arms, and in 

 the distal one-third of the latter the two marginals keep strictly 

 the same fi'ont. The inferomarginal plates are mostly coincident 

 with the superomarginals, but are also frequently alternate. 



