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Bulletin Vanderbilt Marine Museum, Vol. VII 



Text figure 11. — Actinopyga mauritiana (Quoy and Gaimard) : a, typi- 

 cal forms of rods from dorsal perisome; b, typical small rods from dorsal 

 perisome; c, typical rods from ventral perisome, and d, granules from the 

 same; all greatly magnified, about X 700. 



umber. Another specimen was unspotted, deep olive brown dor- 

 sally, light pinkish brown ventrally, with the tube-feet raw umber 

 and the tentacles greenish brown, or translucent raw umber, with 

 grayish effects in some lights. Another Hawaiian specimen was 

 light olivaceous brown dorsally, decidedly blotched with white on 

 the sides and with all the dorsal papillae ringed with white. 



The Society Islands specimens have regrettably lost their living 

 colouration and in the preserved state are all a rich mahogany 

 brown. 



Habitat : Dr. Fisher records this species as abundant in the 

 lava rock tidepools of Hawaii and apparently not seeking conceal- 

 ment, but not to be found in the coral reefs there. 



The "Alva" specimens from Tahiti were all found in the coral 

 reef zone of Venus Point Reef. 



Technical description: The living animals are quite large, 

 elongate, usually somewhat constricted anteriorly and widest pos- 



