430 PROF. P. M. DUNCAN ON DEEP-SEA [May 16, 



List of Species, and their Classification. 



Suborder Sclerodermata. 



Section Madreporaria aporosa. 



Family Turbinolid^e. 



Subfam. Caryophylliace.e. 



Conocyathus zelandice, sp. n. 



Subfam. Trochocyathace^e. 



Deltocyathus orientalis, sp. n. Paracyathus coronatus, sp. n. 



Puracyathus persicus, sp. n. 



Subfam. Turbinolid.e reptantes, nov. 

 Polycyathus atlanticus, sp. n. Jgelecyathus helence, var. n. 



Agelecyathus helence, sp. n. 2 jers ^ cus > S P* n - 



Subfam. Turbinoliace.e. 

 Javania insignis, sp. n. Brachytrochns simplex, sp. n. 

 Family Oculinid.e. 

 Oculina cuba'ensis, sp. n. 



Family Astr^eidje. 



Subfam. Astr^ein.e. 



Antillia lonsdaleia, var. n. 



Division Cladocorace^e. 



Dendrocora fissipara, sp. n. 



Division Astrangiace.e. 



Astrangia minuta, sp. n. Cylicia tenella, var. n. 



epithecata, sp. n. 



Madreporaria perforata. 

 Family Eupsammin^e. 

 Balanophyllia helence, sp. n. Placopsammia darwini, sp. n. 

 striata, sp. n. 



Species reconsidered. 



Family Gculinid.e. 



Sclerohelia hirtella, Pallas. 



L'yathohelia axillaris, Ellis & Solander. 



Description of the Species. 



Suborder Sclerodermata. 



Madreporaria aporosa. 



Family Turbinoliid.e. 



Subfam. Caryophylliace/E. 



Genus Conocyathus, D'Orbigny. 



Tbis genus is tbus described by Milne-Edwards and Jules Haime 

 in their ' Hist. Nat. des Corall.' vol. ii. p. 25 : — 



