1870.] e Porcupine '-Expedition Madreporaria. 291 



List of species common to the area and to the Florida and Havana 

 deep-sea faunas only. 



1. Balanophyllia socialis, Pourtales, sp. 



2. Amphihelia profunda, Pourtales, sp. 



3. Pliobothrus symmetricus, Pourtales, sp. 



These forms are not known in the West-Indjan Cainozoic fauna, and 

 they have not been discovered in any European deposits. 



Lophohelia prolifera (var. affinis) is common to the British and Florida 

 deep-sea faunas ; it is found fossil in the Sicilian Tertiaries, being more- 

 over a member of the recent fauna of the Mediterranean. 



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



1 . Caryophyllia borealis, Fleming. 



2. Amphihelia oculata, Linnceus, sp. 



3. Lophohelia prolifera, Pallas, sp. 



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



1 . Caryophyllia borealis, Fleming. Sicilian : Miocene and Pliocene. 



2. Ceratocyathus ornatus, Seguenza. Sicilian : Miocene and Pliocene. 



3. Flabellum laciniatum, Ed. H. Sicilian, Calabrian : Miocene and 



Pliocene. 



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



5. Amphihelia miocenica, Seguenza. Sicilian : Miocene and Pliocene. 



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

 1 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 are 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. Caryophyllia borealis, Fleming.— Having collected a veryconsiderable 

 series of the Caryophyllice from the seas around Great Britain, and having 

 been supplied with several specimens of the Mediterranean species, I had 

 some time ago compared the whole with the fossil forms from the Sicilian 



z 2 



