408 ON THE FAUNA AND BOTTOM-DEPOSITS NEAE THE 30-FM. LINE 



[109. Average grade of sample, 6749, Percentage of carbonate of 

 lime in whole sample, 30"15. 



The following are the species of Foraminifera in grades VI. and VII. 

 in order of frequency : — Rotalia beccarii, Miliolina seminuhim, Tcjiularia 

 grainen, Truncatulina lohatula, Discorhina rosacea, Tea^hUaria agglutinans, 

 Miliolina hicornis, Lagena sulcata, Bolivina dilatata. — E. H. W.] 



Shells were plentiful in all the hauls, and in hauls 32, 75, 79, and 

 100 a number of stones were obtained. 



Fauna. The ground as a whole is barren, and in no haul were many- 

 specimens taken, with the exception of haul 100. 



Burroioing species. A few Astropecten irregularis were present, but 

 the species was not at all common, Dentalium entalis was present in 

 the sample of sand, and several bivalve molluscs were taken in individual 

 hauls, as will be seen from the list of the fauna. 



Fixed species. Of species which usually fix themselves in fine sand 

 the following occur on this ground : Antennularia antennina and 

 ra7iiosa, Aglaophetiia mgriophyllum, and Cellaria fishdosa and sinuosa, 

 the two latter in considerable abundance. The other representatives 

 of the fixed fauna include species which are typical of the gravels to 

 the north and also those typical of the fine sand to the south. Of the 

 former are Polycarpa varians and Chaetopterus variopedatus, with 

 Halecium halecimim, H. Beanvi and Flumidaria Catharina ; of the 

 latter Sertulay^ella Oayi, Bougainvillia ramosa, and Ascidiella scahra. 



Wandering species. These are not abundant, and are of kinds found 

 both on the gravel and on the fine sand grounds. A noteworthy feature, 

 characteristic of the ground, is the presence in almost every haul of 

 Falmip)es placenta. 



List of Species, Ground VII. 



Foraminifera. 

 Ti'uncatulina lobatula. On Cellaria and 

 hydroids. 



PORIFERA. 



Suberites domuncula. Fairly common, in- 

 habited by Eupagurus 

 cuunensis. 



Cliona celata. Common, boring shells. 



Hydrozoa. 

 Hydractinia echinata. In 76 only, on 

 shell inhabited l)y Eu- 

 jKigurus Bernhardus. 

 Eudendrium ramosum. Fairly plentiful. 

 ,, capillare. Scarce. 



,, sp. Scarce. 



Bougainvillia ramosa. Not nucommon. 



Clytia Johnstoni. Common, on hydroids, 

 etc. 



Obelia dichotoma. In 32 only. 

 Campanularia Hincksii. Common, on 



hydroids and shells. 

 Lafoea dumosa, var. robusta. Frequent. 



Creeping variety also 



abundant on hydi'oids 



and Cellaria. 

 CalycelJa fastigiata. Recorded in 75 only. 

 Halecium halecinum. Plentiful on CMe- 



topterus tubes and on 



shells. 

 ,, Beanii. Not so plentiful as 



H. halecinum. 

 ,, labrosuni. Recorded in 75 only, 

 Sertularella Gayi. Generally moderately 



plentiful. In hauls 69, 



71, and 109 small 



pieces only. 

 ,, polyzonias. Scarce. 



Sertularia argentea. In 79 and 32 only. 



Not abundant. 



