62 BATHYMETRICAL DISTRIBUTION. 



Tliecocyatlius la3vigatus. 

 Lopbohelia prolifera. 

 Stylaster erubescens. 

 Allopora miniata. 

 Distichopora foliacea. 

 Tliecopsammia tintinnabulum. 

 Tbecopsammia socialis. 

 DenclropbylUa cornucopia. 

 Dendropbyllia cyatboides. 

 Diaseris pusilla. 

 Diaseris crispa. 

 Pliobotbrus svmmetriciis. 

 Pliobotbrus tubulatus. 

 In tbe Globigerina mud we find only tbe following species : — 



Caryopbyllia cornuformis (living). 

 Paracyatbus folliculus (dead). 

 Diplobelia profunda (dead). 

 Fungia symmetrica (dead). i 



Haplopbyllia paradoxa (living). 

 On tbe wbole tbe differences between tbese different regions are not 

 very great, at least as far as family and generic cbaracters go. But tbe 

 difterences from tbe nearest reef fauna are, as migbt be expected, very 

 striking. No Astra3ida3, no Madreporida) (excluding tbe Eupsam- 

 midie), tbe most abundant families in species and in individuals on tbe 

 West Indian reefs, extend to any considerable deptb. Tbe flmiilies bav- 

 ing apparently tbe greatest range in deptb are tbe Oculinidae, the 

 Stylasteridie, and tbe Milleporidae. 



Simple corals wliicb form sucli a large proportion of tbe deep-sea 

 fauna are not represented at all in tbe Florid ian reef fauna ; some 

 species are described from tbe West Indies, but witbout indications of 

 deptb. 



Tbe specimens of soundings brougbt up by tbe lead from tbe Gulf 

 Stream fartber nortb contain frequently small fragments of corals, of 

 wbicb tbe following liave been determined : — 



Cryptobelia Peircei, lat. 31° 32' N., long. 78° 20' W., 600 fatboms. 

 Disticbopora foliacea, lat. 31° 32' N., long. 78° 20' W., 600 fatboms. 

 Stylaster erubescens, lat. 31° 32' N., long. 78^ 20' W., 600 fatboms. 

 Lepidopora glabra, lat. 31° 32' N., long. 78° 20' W., 600 fatboms. 

 Diplobelia profunda, lat. 30° li' N., long. 79° 35i' AV., 530 fatboms. 

 Caryopbyllia formosa, lat. 30° li' N., long. 79° 35^' 530 fatboms. 

 Stylaster erubescens, lat. 29° 48"' N., long. 79° 17'"w., 450 fatboms. 

 Lepidopora glabra, lat. 29° 48' N., long. 79° 17' W., 450 fiitboms. 

 Diplobelia profunda, lat. 28° 53^' N., long. 79° 33f ' W., 410 ftxtboms. 

 Tbese localities are all iu or near tbe axis of tbe Gulf Stream, be- 



