422 ON THE FAUNA AND BOTTOM-DEPOSITS NEAR THE 30-FM. LINE 



Buccinum uiulatum. Generally two or 

 three specimens. 



Proneonicnia aglaopheniac. Occasionally 

 found, on stem of 

 Aijlaophcniaimjrioplnjl- 

 lum. 



Scaphander lignarius. 

 Doto fragilis. 



On Ualccium halccinum. 



Shells. 



Lyonsia uorvegica. One or two only. 



Solen ensis. One or two only. 



Tcllina donacina. Few only. 



Tapes virginca. Numerous. 



Artemis exoleta. Numerous. 



Cardium echinatum. Few only. 



,, norvegicum. 



Lima Losconibii. Many in 46 only. 



Pecten maximus. Fairly numerous. 



,, opcrcularis. Abundant. (Few in 

 84.) 



Dentalium entalis. 



Troclius granulatus. One in 8, with 

 Adamsia imlliatM. 



Turritella communis. Few. 



POLYZOA. 



Cellaria sinuosa. 1 „ , . , 



„ fistuiosa. r ''^ ^" ^"^-g*^ i"""*^*y- 



Bicellaria ciliata. Fixed to hydroids, &c. 



Scrupocellaria scruposa. Fixed to the 

 base of hydroids and to 

 shells. Plentiful. 



Cellepora avicularis. ^ 



1 I Attached to hy- 



Idmonea serpens. ' 



Incrusting species not very numerous. 

 For list see Table VI., ^i. 534. 



TUNICATA. 



Molgula oculata. In 47 only. 



,, s}). In 46. 

 Polycarpa varians. One or two large in 



47 only. 

 Ascidiella venosa. Few, 



, , scabra. Few only. 



Ground XII. 

 Edge of Hand Deeps. 

 Haul 83 (Dr. and C-dr,). 

 Buttom-deposit. Medium gravel mixed with some mud. 



Texture :- 



II. Coarse Gravel 



III. Medium Gravel 



IV. Fine Gravel 

 V. Coarse Sand 



VI. Medium Sand 



VII. Fine Sand... 



VIII. Silt 



[83. Average grade of sample 

 lime in whole sample, 40 '74 Hi 



, 27-9 per cent. 

 28-3 „ 

 14-1 „ 

 6-0 „ 

 7-3 „ 

 8-3 „ 

 ■ 8-2 „ 

 •94G. Percentage of carbonate of 



ghest percentage occurs in V., which 

 contains G2-29. In II. over 90 per cent, by weight of the rock con- 

 stituents are Triassic, and only about 8 per cent, derived from the 

 Eddystone reef. In III. over 70 per cent, by weight of the rock 

 constituents are Triassic, over 18 per cent, derived from the Eddystone 

 reef, and about 10 per cent, are Devonian. In 83 VI. Foraminifera are 

 particularly abundant, as also in 83 VII. In these grades the following 

 species occur, arranged in order of frequency : — Truncatulina lohatida, 

 Miliolina scminulum, Spiroloculma 2danulata, liotalia hcccarii, Dis- 

 corhina rosacea, Textularia gramcn, Tcxtularia agghUinans, Miliolina 

 hicornis, Lagcna orhignyana, Planorhdina mediterrancnsis, Bolivina 

 dilatata, Spirilllna vivipara, Biloculina ringens, BiUimina pupoidcs. In 

 all, fourteen species. — U. II. W.] 



