288 Royal Society : — 



These forms arc not known in the "West-Indian Cainozoic fauna, 

 and they have not been discovered in any European deposits. 



Lojihohelia proJifera (var, affinis) is common to the British and 

 Florida deep-sea faunas ; it is foxind fossil in the Sicilian Ter- 

 tiaries, being moreover a member of the recent fauna of the Me- 

 diterranean. 



List of species common to the area and to the Mediterranean sea. 



1. Gary ophy Ilia borealis, Fleminff. 



2. Amphihelia occulata, Linnaus, sp. 



3. Lophohelia prolifera, FaUas, sp. 



List of species found on the area dredged, and as fossils elsewhere. 



1. Caryophyllia borealis, Fleming. Sicilian : Miocene and 



Pliocene. 



2. Ceratocyathus ornatus, Secjuenza. Sicilian : Miocene and 



Pliocene. 



3. Flabellum laciniatum, Ed. Sf H. Sicilian : Calabrian, Mio- 



cene and Pliocene. 



4. Lophohelia prolifera, Pallas, sp. Sicilian : Miocene and 



Pliocene. 



5. Amphihelia miocenica, Scr/nenza. Sicilian]: Miocene and 



Pliocene. 



The deep-sea coral-fauna of the area dredged in the ' Porcupine ' 

 and ' Lightning ' Expeditions is therefore composed of : — 



5 species which have lasted since the early Cainozoic period. 

 1 Mediterranean species not known in Cainozoic deposits. 

 3 species of the deep-sea fauna of Florida and Havana. 

 3 indigenous species. 



12 



Two of the fossil species arc represented in the recent fauna of 

 the Mediterranean. 



If the species which I have absorbed into others (in consequence 

 of the light thrown upon the amount of variation in the deep-sea 

 corals) were counted, the fossil forms would be in all 8, 



The greatest depth from which Madreporaria were dredged was 

 705 fathoms, and the lowest temperature of the water in which they 

 lived was 29°- 9. 



II. CaryophylUa horeaJis, Fleming. — Having collected a very consi- 

 derable scries of the CaryopliylVun from the seas around Great Bri- 

 tain, and having been sujiplied with several specimens of the Medi- 

 terranean species, I had some time ago compared the whole with the 

 fossil forms from the Sicilian tertiary deposits and with each other. 

 The numerous specimens of Caryophyllicp dredged up in Dingle Bay 

 were especially interesting after I had arrived at satisfactory con- 

 clusions respecting the affinities of the above-mentioned British and 

 Southern-European forms. The Dingle-Bay collection presented all 



