50 CEYLON PEARL OYSTER REPORT. 



great numbers. In one haul of short duration we obtained about 1350 young fish, 

 including 5 kinds of flat fish. 



The Tow-nettings this day (February 17th) were very rich and included : 



Trichodesmium erythrceum, Ceratium, Radiolaria ; 



Various Siphonophora and Ctenophora ; 



Sagitta (large), Larval Annelides, and some Syllids ; 



Copepoda Many beautiful species, including Calocalanus pavo, Metacalanus 

 aurivillii, Labidocera pavo and L. acutum, Centwpages gracilis, Candaci<< catula, and 

 C. truncata, Oithona plumifera (colourless with little plumes of scarlet, and having 

 pale lilac egg masses), and a new species of Euchceta 36 species of Copepoda in all ; 



Also many larvae Nauplei, Zoea, Phyllosoma (many), Erichthus and Alima, larval 

 molluscs and worms ; 



Appendicularia, Doliolum and Salpa democratica-mucronata (large). 



On Februaiy 18th we left Galle, and spent the day in dredging in the deep water 

 further out than on the previous day, and onwards up the west coast on our way to 

 Colombo. A considerable part of the time was spent on and off the 100-fathom line 

 south of Galle. 



At 6.30 a.m. at about 3 miles south of Point de Galle the sea- temperature was 

 79 - 5 F., and at 6.30 p.m. when we anchored for the night at 3^ miles south of 

 Barberyn Lighthouse it was 80 F. ; at both times the specific gravity was 1 "023. 



The day's dredging may be divided into 3 stations 



STATION XL. About 10 miles oft' Watering Point, direction south by west; depth 

 34 fathoms ; bottom coarse sand, shells, coral fragments, Nullipores and 

 JSalimeda ; dredged. 



Polytrema miniaceum, Alveolina boscii, Orbitolites eomplanata, Heterostegina 

 depressa, and Amphistegina lessonii ; 



Tcthya sp., some Tetractinellids, Bhizochalina Jistulosa, and Horny sponges; 



Chironephthya variabilis, Plexaura indica, Briareum sp., Solenocaidon sp., 

 Gorgonids (many), Cavernularia obesa, Lituaria phalloides and several species of 

 Pennatulids, Flabellum sp., Caryophyllia sp., Stephanoseris rmisseaui ; 



Hydroids Sertularia distans, S. (? n. sp.), Antennella allmani, Zygophylax 

 tizardensis, Idia pristina, Lytocarpus (? n. sp.); 



Clypeaster scutiforrnis (?); Lovenia elongala, Phyllacanthus baculosa and Cidaris 

 metularia, Echinothrix calamaria ; 



Species of Protula, Glycera, and Hyalincecia ; 



Polyzoa a large number of species, of which Miss Thornely has already identified 

 the following, Cellepora cidaris, C. boryi, C tritubercidata, Flustra spoliata, 

 Chorizopora brongniartii, Cribrilina radiata, Micropora coriacea, Smittipora 

 abyssicola, Membranipora cornigera, and also species of the genera Lepralia, 



