100 K. MITSÜKUEI : STUDIES ON 



these specimens with H. macleari Bell, the description of which 

 leaves much to be desired. But the calcareous bodies, so far as 

 described by Bell, and the characteristic markings agree so close- 

 ly with it that I feel justified in putting these specimens in the 

 species named. 



Tentacles 20, yellow. In the present contracted state, the 

 largest specimen measures 5x2 cm. and the smallest 2.3x1 cm. 

 In the living state, they were much larger and more slender. 

 The one I figured while living was 9x1 cm. 



Pedicels on the ventrum, papilla} on the dorsum : the former 

 more numerous than the latter. When contracted, it is possible 

 to make out that both are placed on the ambulacra. On the 

 dorsum, there are two rows of the papillœ on each of the dorsal 

 ambulacra. On the ventral median ambulacrum there are two 

 rows of pedicels, which appear more crowded in alcoholic speci- 

 mens. On each of the lateral ambulacra, which mark the bound- 

 ary of the dorsal and ventral surfaces, there are again two rows, 

 of which one row consists of papillœ and the other of pedicels. 

 When living and stretched out, it is difficult to make out these 

 rows, the appendages appearing as if irregularly scattered over 

 the ambulacra as well as the interambulacra. 



The ground color is chestnut brown, which changes into dark 

 chestnut when the animal is contracted in alcohol. The ambu- 

 lacral appendages are white, each being surrounded at base by a 

 whitish area which gradually merges without any sharp demarca- 

 tion into the surrounding chestnut color. The tip of the append- 

 ages is straw yellow. The white areas that mark the appendages 

 are very conspicuous, especially on the dorsum. In contracted 

 alcoholic specimens these are seen to be arranged in longitudinal 

 rows as well as in transverse rings, an appearance wliich, I take 



