Si CEYLON PEARL OYSTER REPORT. 



examine and collect on the beach. Many "calling-crabs" (Gelasimus) were seen, 

 and a large quantity of molluscan shells was obtained a species of Bulla was 

 especially common. Only one specimen of pearl oyster (dead, but having the valves 

 still attached) was found, and a closely allied species of Avicula with a longer wing 

 was also taken. Amongst the other shells obtained here, and at other places round 

 Trincomalee, were such typical Indian forms as : 



Pecten plica, Pinna bicolor, P. fumata, P. chemnitzii, and P. zebuensis, Modiola 

 tulipa, Psammobia amethystus, Cardium asiaticum, Ostrea hyotis, Vulsella rugosa, 

 Avicida vexiUum, Area decussate/,, Chama foliata, Malleus vulgaris, Placuna placenta , 

 Ricinula arachnoides, Rotella vestiaria, Trochus niloticus, Margarita acuminata, 

 Phasianella lineolata, Fasciolaria trapezium, Pyrula Jicus, Fusus tuberculatum, 

 Murex haustellum, M. tenuispina, Eburna zeylanica, Triton lotorium, T. pilearis, 

 T. galliuago, T. tripus, Xenopltora calculifera, Solarium perspectivum, Strombus 

 succinctus, S. sibbaldii and S. canarium, Cassis glauca, C. canaliculata, Dolium 

 maculatum, D. olearium, Conus tessellatus, C. terminus, C. miles, C. betulinus, 

 C striatus, Oliva maura, 0. gibbosa, O. ispidula, 0. elegans, O. torsans, O. Candida, 

 Cyprcea arabica, C. lynx, C. moneta, C. ocellata, C. errones, C. caput- serpentis, 

 C. coffea, C. tigris, C. mauritiana, C asellus, Natica mammillata, Pterocera scorpius, 

 Harpa conoidalis, II. ventricosa, Eburna ceylonica, Pyrazus palustris, Turritella 

 duplicata, T. attenuata, Telcscopnum fuscum, Terebra tigrina, Turbinella spirillus, 

 Bulla ampulla and Spirula peronii. 



Two hauls of the dredge were now taken nearer Foul Point (Station XXV.) in 

 much shallower water and on smoother but less interesting ground. 



STATION XXV. Three-quarters of a mile to a mile west-north-west of Foul Point ; 

 depth 8 fathoms ; bottom firm, Orbitolites sand and Nullipores ; dredged. 



Orbitolites complanata, Heterostegina dep)ressa and other Foraminifera ; 



Fungia dental" ; Antedon sp. ; 



Hyalinacia sp. (numerous), Sigalion sp. ; various crabs ; Molgula sp. ; 



AmpliioUs' i: ~ (two, young), Saurida nebulosco, Leptocephalus and a small Sole. 



Several tow-xet gatherings had been taken during the day (February 8th), but 

 they contained comparatively little except Trichodcsmium crythreeum, which was 

 present in great abundance, some Euclavta sp., Labidocera hroyeri, Euterpe acutifrons, 

 and many young Copepods. 



The following day (Sunday) we lay at anchor in Trincomalee harbour, and employed 

 the time in very necessary examination, jjreservation, and packing of specimens, and 

 unpacking of stores, and writing up of notes. We also did some shore-collecting and 

 obtained local evidence in regard to the occurrence of the pearl oysters at Trincomalee. 

 Mr. Colomb had brought on board, for our inspection, a number of the empty shells 

 of oysters which had been picked up by the natives in shallow water between Powder 



* Specimens apparently nut kept, so species not certain. 



