FROM THE EDDYSTONE GROUNDS TO START POINT. 417 



[96. Average grade of sample, 4-081. Percentage of carbonate of 

 lime in whole sample, 33'18. Highest percentage occurs in IV., which 

 contains 60 08 per cent. In 94 II. the gravel consists of Trias, 77 per 

 cent.; Eddystone reef, 13 per cent.; Devonian, 10 per cent. In 94 III. 

 the proportions are, Trias, 69 per cent.; Eddystone reef, 18 per cent.; 

 Devonian, 13 per cent. In 96 VII. Foraminifera are numerous. The 

 following species occur in VI. and VII., following order of frequency : — 

 llotalia hcccarii, Textularia gi'amen, Miliolina seminuhim, Truncatulina 

 lohatula, Spiroloeulina plcmulata, Lagena sulcata, Textularia agrjlutinans, 

 Biloculina ringens, Miliolina hicornis, Polymorphina lactea, Discorhina 

 rosacea. In all, eleven species. — R H. W.] 



Shells were numerous. For list see p. 418. 



The fauna of this gronnd is characterised by the very great abundance 

 of Ophiotkriv fragilis, which occurs almost to the exclusion of every 

 other species. The dredge comes up nearly full of these ophiurids. 

 In haul 89 the only other living species taken was Ophiocoma nigra, of 

 which there were a few large specimens. In the remaining hauls a few 

 specimens of other species were obtained, but generally not more than 

 one or two in each. These species, as will be seen from the following 

 list, consist of immigrants from the grounds on either side, that is, from 

 the medium gravel of Ground XIV. and from the coarse gravel of 

 Ground IX. Ground X, may be regarded as a great centre of distri- 

 bution of Ophiothrix fragilis, from which it extends on all sides on to 

 the surrounding grounds (Chart VIII.). The ophiurids were found to 

 be feeding on the fine silt, of which there is a somewhat high 

 percentage in the bottom-deposit. 



List of Species. Ground X. 

 A. Haul 89. 



ECIIINODERMATA. MOLLUSCA. Sliclls. 



Ophiothrix fragilis. Dredge half full. Pecten operciilaris. A few only. 



Ophiocoma nigra. A few, large. 



B. Hauls 42, 55, 95. 



(B). Hyduozoa. Antciinularia anteuuiua. Not plentiful. 

 Eudcndriuni, s;j. ^wvAWsp.woiE.capillarc, „ ramosa. One piece in 42 



in 55 only, growing on o\\\y. 



Ilildndlmania, which Aglaophenia tulmlifera. In 55 only, grow- 



was fixed to a stone. m>;on Pu/i/carjiavariaus. 



Canipaniiiaiia iiiuuksii. riunmlaria Catharina. Green variety iu 

 Lafoea duinosa, var. roljusta. In 55 only. 55 only. 



Halecium halccinum. Not i)leiitiful. 



Most abundant in 55. (15). Actinozoa. 



Halecium Beanii. Not i)lentiful. Alcyonium digitatum. Young colonics on 



Sertularelia llayi. Not iilcntiful. Largest I'lxlcn opercular is. One 



(quantity in 55. or two only. 



Hydrallniania falcata. In 55 only, grow- Sarcodictyon catcnata. A small <|uantily 



ing on a stone. iu 95 only. 



