32 CEYLON PEARL oYKTEK REPORT. 



Stellaster sp. (many), Astropecten liempricliii and A. eury acanthus, Ophiocnemis 

 marmorata and other Oplhnroids, Cucumaria imbvicata (several) ; 



Aspidosiphon corallicola, &c. ; 



Cardium rugoaum, Fusus tuberculatus, Cerithium citrinum, Tudicla spirillus, 

 Philine sp. 



We divided up the days devoted to work in the neighbourhood of Trincomalee so 

 as to examine as much as possible of the fauna of this extensive and complicated 

 region (see fig. 2). About twelve bays were explored either with the steamer or the 

 small boats, and we also managed to do some collecting along the shore. The general 

 arrangement was : 



( hi February 7th, Back Bay : 

 ,, ,, 8th, Back Bay, Dutch Bay, and off Foul Point; 



,, ,, 9th, at anchor, shore-collecting, and investigating the pearl oysters ; 



,, ,, LOth, dredging from the boats in the creeks of the inner bay ; 



,, ,, 11th, Tamblegam Bay. 



On February 8th, at 7 a.m., the sea-temperature in the inner bay was 77'5 F., and 

 at 8 a.m., in Back Bay, was 78 F., the specific gravity at both localities being 1'021. 

 We started dredging at 8 A.M., in the southern part of Back Bay (Station XXL), one 

 of the localities where Dr. Kelaart is said to have deposited pearl oysters in 1857, 

 and where we were told the native fishermen occasionally found them. 



STATION XXI. In Back Bay, North of Fort Frederick; depth 8-12 fathoms; 

 bottom firm sand, in places some mud; several hauls of dredge, but no traces 

 of pearl oysters. Amongst the animals obtained were : 



Adamsia ? (on Chank shell), Virgularia juncea, Pteroeides esperi; 



Laganumdeprcssum, Thyone fusca, n. sp. (Pearson), Cucumaria imbricata, various 

 Ophiuroids and small Asterids (mainly young StclJasters) ; 



Carinella sp., Terebella and other worm tubes ; 



Portunids (small), Ebalia sp. and other crabs ; 



Turbinella rapa, Strombus succinctus. and species of Comix, Cerithium, Dentalium, 

 and Cardium ; 



Psammaplidium sp. and Lcptoclinum (sev. spp.). 



We then tried Dutch Bay (Station XXII. ), to the South of Fort Frederick, with 

 similar results, a hard bottom with an abundant general fauna, but no pearl oysters. 



STATION XXII. Across mouth of Dutch Bay from Fort Frederick to Dutch Point ; 

 depth 13 fathoms; bottom dead coral, shells, and Nullipores ; dredged. 

 Fungia sp, , Dendrophyllia sp., Heteropsammia michdini (with Gephyrea), Sarco- 

 phytum sp., and other Alcyonaria ; 



