FROM THE EDDYSrONE GROUNDS TO START POINT. 427 



Ground XIV. The West Eddystone Fine Gravel. 



Havls. 73 (O.-tr.), 74 (Dr.), 35 (Dr.), 36 (O.-tr.), 88 (Dr.), 41 (Dr.), 

 85 (C.-dr. and Dr.), 58 (Dr.), 59 (Dr.). 



Bottom-dc2')osit. Fine gravel. A sample with the canvas dredge was 

 taken only at haul 85, and had the following texture : — 



II. Coarse Gravel ... ... ... 41 per cent. 



1/ y 



... ... Jo'l ,, 



21-0 „ 



23-4 „ 



5-2 „ 



0-6 „ 



[85. Average grade of sample, 4*597. Percentage of carbonate of 

 lime in whole sample, 27'87. Highest percentage occurs in II., which 

 contains 56'00 per cent., but this grade is only present in small propor- 

 tion, and III. at 39"50 per cent, is more reliable. Practically speaking 

 in grades II. and III. 66 per cent, by weight of the rock fragments are 

 Triassic, 28 per cent, derived from the Eddystone reef, and 6 per cent, 

 apparently Devonian. A great feature in this sample is the evidence of 

 long-continued and somewhat violent wave action, presented by the 

 beautifully rounded and polished form of the quartz grains and other 

 constituents of the gravels and sands, especially in the finer grades. 

 This will be found referred to at greater length elsewhere (pp. 376 and 

 385). Foraminifera are not numerous, the smaller varieties are absent, 

 and Milioline forms largely predominate. The following species were 

 found in VI. and VII., and have been arranged in order of frequency : — 

 Miliolina seminulum, Rotalia beccarii, Textularia gramen, Tcxlularia 

 agghitincms, Miliolina bicornis, Discorbina rosacea, Biloculina ringcns. 

 In all, seven species. — E. H. W.] 



Shells were numerous (for list see p. 430). The material of the 

 gravel in the above sample was largely inorganic, but in some of the 

 other hauls, where no samples were taken with the canvas dredge, 

 there were indications of the deposit containing a much larger quantity 

 of broken shell, more nearly approaching that of Ground XVI. 

 (Haul 87.) 



Biivroiving sjjccics. The most characteristic burrowing animals on 

 this ground are Spatangus ^;?<?7?2«'ews, Cardium norvegicum, and 

 Drepanophorus rubrostria tus. 



Fixed species. Very few hydroids are present, the most common 

 forms being Halecium halecinum and Halecium Beanii fixed to the 

 tubes of Chactopterus, which is moderately plentiful, but nut nearly so 



