BIOLOGICAL SURVEY OF TRINCOMALEE HARBOUR. 39 



Station 50. — China Bay, nearly one mile almost due east of 

 Plantain Point. 



Depth, 5 fathoms. Bottom, hard sand and Halimeda. 



Two Ilolothnria marmorata. Yellow sponges with Synapta striata. 

 AcantheUa carteri and Plocamia manadrensis and other sponges. 

 ^V}lite Nudibranch with purple spots. Small Gastropod (Pterocera). 

 Halimeda. 



Station 51. — China Bay, quarter mile south-west of Middle Point. 

 Depth, 4 fathoms. Bottom, sand and stones. 

 Petrosia similis. a blue sponge. Several small crabs. Little 

 Halimeda. 



Station 52. — Opposite entrance to Yard Cove, 600 yards west of 

 Plantain Point. 

 Depth, 7 fathoms. Bottom, sand. 

 Four Holothuria marmorata. A few common sponges. 



Station 53. — 600 yards west-south-west of Powder Rocks. 



Depth, 8 fathoms. Bottom, sand and gravel. 



Several flat Clypeastroids about li inch across. Few Holothuria 

 marmorata. Few Holothuria scabra. Metapeneus mogiensis. Syn- 

 apta striata in sponge masses. Various common sponges. 



Station •5i.— Half a mile north-east of Round Point. 

 Depth, 10 fathoms. Bottom, sand and gravel. 

 Nothing but pieces of a Virgularia-l^e Alcyonarian. 



Station 55. — 500 yards east of Round Point. 

 Depth, 14 fathoms. Bottom, soft mud. 

 Nothing in di'edge. 



January 29, 1911. 



Station 56. — Clappenberg Bay, south end of Fi'ench Pass in mid- 

 channel. 



Depth, 10 fathoms. Bottom, sand. 



Many blue Echinoids. Holothuria marmorata. Saron gibherosus. 

 Sponges containing Synalpheus minus. Red dichotamous seaweed. 

 Halimeda. Several small shrimps {Peridimenes ?). Large cii'cular 

 Foraminifera (Orbitolites). Black dichotamously branched sponge 

 (Axinella ?). Several small Cljrpeastroids. Sandy Ascidians. 

 Crabs, shells, &c. 



Station 57. — ^Middle of French Pass. 

 Depth, 5 fathoms. Bottom, sand. 



Few sponges and shells. Metapeneus mogiensis. Few Clype- 

 astroids. 



Station 58. — South end of French Pass. 



Depth, 7 fathoms. Bottom, sand. 



Three Holothuria marmorata. A few sponges. 



