424 ON THE FAUNA AND BOTTOM-DEPOSITS NEAK THE 30-FM. LINE 



Eiiclitliouius abditus. Forming tubes on 

 Sertularella Uaiji. 



MoLLUSCA. Living. 



!Modiola modiolus. Small specimens only. 



Pecteu maximus. One only. 



,, opercularis. A few half-gi'own 

 ones. 



Anomia epliipiiium. Small, abundant on 



Chaet02)tcrus tubes. 

 Buccinum undatum. One. 



Proneomenia aglaopheniae. On Aijlao- 

 2>hc)iia myriopItijUum. 



Doto fragilis. On Ilalccium halccinum. 



Shells. 

 Lutraria elliptica. 

 Cyprina islandica. 

 Cardiura cclunatum. 



,, norvegicuni. Small shells only. 

 Pecteu maximus. One. 



Peeten opercularis. Many. 



Buccinum undatum. Witli Eupagurus 

 Bcrnhardus. 



POLYZOA. 



Cellaria fistulosa. One small piece only. 



Idmonea serpens. 



Cellepora avicularis. 



Few incrusting Polyzoa. Shells mostly 

 clean. 



On P. opercularis shells : — 



Schizoj)orella linearis. 



Porella conciuna. 



Scliizoporella auriculata. 



Rhynchopora bispinosa. 



TUNICATA. 



Ascidiella scabra. One at root of Ajiten- 

 nularia antennina. 



Pisces. 

 Lepadogaster bimaculatus. 



One. 



Ground XIII. 



One mile south-east of the Eddystone. 

 Haul 103 (Dr.). 



Bottom-deposit. The bottom-deposit consists of a mixture of shell- 

 gravel of medium texture, with a considerable quantity of mud. This 

 is shown by the following figures expressing the composition of the 

 sample : — 



... 13*4 per cent. 



290 



17-0 „ 



6-2 „ 



6-9 „ 



10-4 „ 



17-1 „ 



[103. Average grade of sample, 4"638. Percentage of carbonate 

 of lime in whole sample, GTIS. Highest percentage occurs in III,, 

 which contains 90'50 per cent. This grade, which constitutes 29 per 

 cent, of the whole sample, is the predominant grade in the sample. 

 The rock constituents in 103 II. are proportioned as follows: — Trias, 

 79 per cent.; Eddystone reef, 17 per cent.; Devonian, 4 per cent.; 

 while 103 III. contains little or no Devonian, but Trias and Eddystone 

 reef materials in the proportion of 74 per cent, and 26 per cent. 0"13 

 grams (two grains) of 103 VII. contained 203 foraminifera, or 1562 

 per gram, a large number as compared with nearly every other sample. 



