ECH1N0DEEMA. 13 9 



Station LX., outside Donnan's Paar, 20 to 30 fathoms, and from Cheval Paar, 

 7 fathoms, obtained by the divers. The diameters of the specimens, without the 

 spines, ranged from 1 centiin. to 4'5 centims. 



Phyllacanthus iinperialis (Lamk.). 



One specimen from the Gulf of Manaar, at Station LVIL, outside Dutch Modrarram 

 Paar, 12 to 36 fathoms; it measures about 2 inches in diameter, without the spines, 

 and about 6 inches including them. 



I>IAI>EMATTI).E. 

 Diadeina saxatile (Linn.). 



One small specimen was obtained at Station XL., 10 miles off Galle, depth 

 34 fathoms. This specimen has long spines on the upper surface, handed straw- 

 coloured and red. 



Fchinothrix diadema (Linn.). 

 Obtained at Station XL.. 10 miles off Galle, depth 34 fathoms. 



ECHINOMETRID^E. 



Stomopneustes variolaris (Lamk.). 



Many specimens were found at the south-eastern corner of Welligam Bay, south 

 end of Ceylon, in hollows in rock pools and also under the sea, in cavities and 

 devices of the rock. They were of a very deep purple colour when alive, but are 

 now, both the dried and the spirit specimens, of a greenish-black colour. This species 

 was also observed in the lagoon inside the reef at Galle. 



~& v 



Pseudoboletia maculata, Trosch. 

 One specimen, diameter about 6 "5 centims., was obtained from the Cheval Paar, 

 7 fathoms, by native diver. 



Echinostrephus molare (de Bl.). 



This little species was obtained in coral blocks in the Gulf of Manaar, at Station XV., 

 on Periya Paar, 9 fathoms, 2 specimens; at Station LXlL, between Periya Paar 

 Kerrai and Periya Paar, depth 7 fathoms to 1 3 fathoms, 2 specimens, 1 '5 centims. 

 and 2 centims. in diameter; and on the Jokkenpiddai Paar, obtained by native 

 divers, many specimens, 1 centim. to 1'5 centims. in diameter. 



All the specimens of this little purple Echinid were dug out of deep holes in massive 

 blocks of dead coral ; and the top-shaped or obovate form of the test, with all the 

 long spines on the abactinal surface, seems well adapted to the burrowing habit. 

 It was noticed on the living specimen that the shorter spines on the actinal surface 

 around the mouth are arranged so as to show a spiral twist such as would be produced 

 hv a rotation of the animal within its burrow. 



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