BIOLOGICAL SURVEY OF TRlNCOMALEE HARBOUR. 35 



Station 19. — 500 yards east-north-east of Powder Rocks. 



Depth, 5 fathoms. Bottom, sand and stones. 



Holothuria marmorata. Holothuria scabra. Stichopus chloronotus. 

 Yellow sponge, containing Synayta striata. Numerous sponges, 

 mcivL^mg Megalofastas nigra, Acanthella carter i, and Siphonochalina 

 sponges. 



Statio7i 20. — Quarter mile north of Powder Rocks. 

 Depth, 5 fatlioms. Bottom, sand and stones. 

 Large number of Holothuria marmorata. Numerous extremely 

 young specimens of Synapta striata. Blue Ophimoids. 



January 20, 1911. 



Station 21. — ^Yard Cove, 300 yards north of Plantain Point. 

 Depth, 2| fathoms. Bottom, sand and stones. 

 Dredge full of sand. Yellow sponge, containing Synapta striatal. 

 One Spatangoid. 



Station 22. — ^Yard Cove, 500 yards north-north-east of Plantain 

 Point. 



Depth, 2^ fathoms. Bottom, sand and lot of Halimeda. 



Two Holothuria marmorata. Coral containing several shrimps, 

 including Periclimenes. Black sponge {Megalopastas nigra), 

 containing numerous Alpheids {Alpheus his-incisus). Saron gib- 

 herosus. Conchodytes meleagrince from Pinna. Commercial sponge 

 {Euspongia officinalis). Several other sponges. Yellow sponge, 

 containing Sipunculids. 



Station 23. — In narrow part of Yard Cove, about three-quarter 

 mile north of Plantain Point. 



Depth, 2 J fathoms. Bottom, sand. 



One Stichopus chloronotus. Several Holothuria marmorata. Two 

 large Echinoids. Several small fishes. Large number of sponges, 

 includuig Megalopastas nigra, Hippospongia clathrata, and others. 

 Synapta striata in yellow sponge. Sipunculids, Ophiuroids, and 

 Polychsete worms in sponges. 



Station 24. — Central channel of Yard Cove, 250 yards south-west 

 of Station 23. 



Depth, 2\ fathoms. Bottom, sand. 



Several Holothuria marmorata. One Holothuria scabra. One 

 large Peneus semisulcatus. Many sponges containing Synapta 

 striata, Ophiuroids, Sipunculids, and Polychsetes. 



Station 25.— 300 yards north-west of Plantain Point, in central 

 channel of Yard Cove. 



Depth, 5 fathoms. Bottom, sand. 



Several Holothuria marmorata. Alpheus audouini and Sipunculids 

 in sponge masses. Generally speaking, the southern half of Yard 



