2<; CEYLOX PEAEL OYSTER REPORT. 



" Suran," which form irregular nodular masses of gravel and oysters hound together 

 hy a network of byssal threads spun hy the mussel. A number of the shells of the 

 Suran as well as of the pearl oysters were perforated by the boring Gastropods. 



The next eight hauls (Stations X. to XVII., some of them really representing 

 more than one descent of the dredge) form a series taken from east to west from 

 inside the Cheval to outside the Periya Paar. 



STATION X. One mile to east of East Cheval Paar ; depth 5f fathoms ; bottom 

 quartz sand and dead shells ; no oysters ; dredged. 

 Sclerophytum polydactylum, Suberogorgia suberosa, and other Alcyonaria ; 

 Luidea macidata, Astropecten hemprichii, Pectinura gorgonia ; 

 Cirratulus sp., Acholoe sp. (on Astropecten), Lumbrinereids ; 

 Caprellids (many), Hyastenus sp. (covered with Hydrnids) ; 

 Eburria sp., Turrit dla sp., Philine sp. ; 



Sty da sp. (with red apertures), Molgula (many), Leptoclinum sp. ; 

 Dragonet (Platycephalus punctatus). 



STATION XI. On East Cheval Paar ; depth 6 fathoms ; bottom, sand ; dredged. 



Hircinia dathrata (with Acasta spongitis) ; 



Camjjanidaria juncea, Plumularia setacea (? n. sp.), Idia pristina and MonoMachys 

 didi otoma ; 



Centrosiphon herdmani, n. gen. and sp. (Shipley), Physcosoma asser ; 



Clypeaster humilis and Ediinodiscus auritus, Lovenia eloagata and Echinolampas 

 oviformis, Synapta sp. (?) ; 



Lepidonotus carinidatus, Harmothoe imbricata, Filograna sp., Retepora sp. 



Species of Conus, Cyprcea, and Oliva ; 



Branchiostoma calif or niense, Asymmetron (Heteropleuron) cultellum. 



STATION XII. Between East and West Chevals ; 6 fathoms ; bottom fine sand and 

 much green Algse (Hypnea, Cbidophora, Gracilaria spp.), no oysters ; dredged. 



Laganum depressum, Clypeaster humilis, and Ediinodiscus auritus; 



Sphmroma sp., Mcera rubromaculatct, Elasmopus subcarinatus, Caprellids and other 

 Amphipods ; Philine sp. 



STATION XIII. On West Cheval Paar ; depth 6 fathoms ; bottom old worn coral 

 fragments and dead shells. 

 The haul contained nothing conspicuous except a number of large pearl oysters and 

 a few small ones. The larger ones measured 2|- to 3j inches across. There were also 

 a few dead oysters, four of which had the valves honeycombed by the boring sponge 

 Clione ', and some of the coral fragments contained the Gephyrean Aspidosiphoit 

 steenstrupia. The corals were mainly Porites and Astrreids. 



