XAKKATIYK. 



89 



Pteropods, and 35 species of Copepoda including Corycceus venvstus and C. speciosus, 

 Qlytemnesfra Scutellaria, Kctiuosoma roseitm, Acdrtia erytlrrcta, Onccect mediterranean 



Fig. 24. The deck laboratory on the " Rangasameeporawee," from a photograph hy J. HOENEI.L. 



Rhincalanus comutus, Euchceta marina, Eucalanus stibtenuis, Setella gracilis, 

 Tortanus forcipatus, Calocalanus pavo and C. plumosits. We also obtained from tins 

 paar a remarkable Copepod, described below (see p. 245) as the type of a new genus 

 Ridgeivayia, in honour of His Excellency Sir J. Wkst Rtdgeway, Governor of Ceylon 

 at the time of these investigations. 



The sea-temperature on March 29th at 5.30 p.m. was 84 F., and specific gravity 

 was 1*023. The temperature in our wooden tanks on board at the same time was 

 83 F., and we generally managed, by covering the tanks with moist canvas, to keep 

 the temperature of their contents a degree or two below that of the sea. 



The weather was now very hot. On March 30th, the sea-temperature at 7 a.m. 

 was 84 F., and at 5 P.M. was 85 F. We now moved to the southern part of the 

 paar, and in the afternoon rowed to the coial reef lying off Dutch Bay, where Captain 

 Legoe and I waded over the reef and collected various samples of the fauna. 



On March 31st the weather was still warmer. The sea-temperature was 85 F. 

 in the morning and 88 F. in the afternoon, but we managed to keep that in our 

 tanks on board down to 83'5 F. to 84 F., and the oysters remained very healthy. 

 We moved this morning to the Mudalaikuli Paar, which we found to be practically a 

 living coral reef with no oysters. Fine coral colonies (Coeloria sinensis, Prionastrcea 

 sp., Pachyseris sp., Goniopora sp., Hydnophord microcoria, Galaxea sp., and Fungia 

 patella) and sponges (Axinella earteri, PJujllospongia holdsworthi, Spongionella 

 nigra) were brought up by the divers, but not a single oyster. In the afternoon we 

 took boat and landed at Kattanattu Point, where a long sandy spit runs out to the 

 north-west with a coral reef continuing onward in the same direction and others 

 parallel outside it, so as to give some shelter to a little bay inside the point. We 



N 



