292 Roijal Society :^ 



l>iplohcJi(r, and the smaller specimens of Lnpliohcluv, leads to the 

 belief lliat AiniihificUd is identical j;cnerical!y with 7>//>/t>//^//ff, iind 

 very closely allied to Lophohclia. Indeed the distinction between 

 the LophoheJiiv and Ainphihcliiv is of the slightest kind. 



The species of the genus AwphiheUa dredged up in the * Porcu- 

 pine' Expedition are tivc : — 



1. Amphihclia (Diplohclia) profunda, Pourtalcs, sp. 



2. oculata, LitDuviwi, sp. 



'A. mioccnica, Sc(/ucnza, 



4. atlantica, 7iobis. 



i). ornata, nobis. 



The species came from No. 54 dredging, and from the cold area to 

 the north-west in from 500 to 600 fathoms. 



The specimens are exceedingly beautiful, strong, and perfect; and 

 there was much difficidty experienced in removing the polypes from 

 the calicos. 



1. Amphihclia pvofnnda, Poui'tales, sp., has been noticed. It is 

 a West-Indian form closely allied to a Sicilian miocene species. 



2. Amphihclia oculata, Linnaeus, sp., is well known in the Medi- 

 terranean, and has not hitherto been found in the Atlantic. 



3. Amphihclia mioccnica, Segucnza, is a very common species in 

 the deep sea, but is rare in the miocene deposits of Sicil,^"^, Its fuUy 

 developed costal structures distinguish it from the other ^orrns. 



4. Amp)hiheHa atlantica, nobis, is a new species, large, bushy, and 

 with almost plain coenenchj'ma, which is verj- abundant. 



5. Ampthilitlia ornata, nobis, is a new species closely allied to the 

 miocene form, but its ornamentation is most peculiar, and not con- 

 tinuously cestui ate. 



Allopora oculina, Ehrenberg. — Several specimens of this veiy rare 

 coral were dredged up in No. 54, and one in the 'Lightning' Expe- 

 dition, not far from the same spot. 



The type is in the Berlin Museum ; the locality whence it camo 

 is unkno'\\'n. 



The distinction between these massive and densely hard corals 

 (whose calices are principally on one side of the caMicnchyma of the 

 stem) and the Sti/la.<ffrs is very evident. 



M. de Pourtalcs has described a pretty i-cd-colourcd Allopora 

 miniaia dredged in 100 to 324 fathoms off the Florida reef; but it 

 is very distinct from the species discovered in the late deep-sea 

 dredging expeditions. 



Al/o/'Ora has no f(jssil representatives. 



Balanoph)/llia {Thccopmrnmia) socialis, Pourtalcs. — Six specimens 

 of a simple perforate coral were dredged up in lat. 50° 50' N., long. 

 6° 27' W., 363 fathoms, temperature 31°-S (No. 54), and one in lat. 

 61° 10' N., long. 2= 21' W., 345 tathoms, temp. 20°-d (No. 05). 



The six specimens are of different sizes and ages ; and although 

 they present considerable variation in shape and septal development, 

 they evidently belong to one type. The solitary coral from No. 65 

 is larger than the others, but it belongs to the same species. 



