84 THE VOYAGE OF H.M.S. CHALLENGER. 



Species 1. Plioboihrus symmetricus, Pourtales, Bull. Mus. Comp. Zool., No. 7 ; 



Deep-Sea Corals, p. 57, pi. iv. figs. 7, 8. Dredged off Florida and Key 



West, in from 98 to 154 fathoms ; lat. 24° 16' N., long. 82° 13' W., 229 



fathoms, Bull. Mus. Comp. Zool., Harvard, No. 9, vol. v. p. 211. 



Cold Area of North Atlantic, in 500 to 600 fathoms, P. M. Duncan, 



Madreporaria of the " Porcupine " Expedition, Trans. Zool. Soc, part 5, 



vol. viii. p. 336. 



Off Sombrero Island, Danish West Indies, in 460 fathoms, Challenger, 



Proc. Eoy. Soc, No. 170, 1876, p. 548. 

 Species 2. Plioboihrus tubulatus, Pourtales, Deep-Sea Corals, p. 58, pi. iv. fig. 9. 



Off Havana, in 270 fathoms ; lat. 23° 11' N., long. 82° 23' W., 292 fathoms, 



Bull. Mus. Comp. Zool., No. 9, vol. v. p. 211. 



(III.) Genus Errina, Gray, Proc. Zool. Soc, 1835, p. 35 ; Saville Kent, Proc. Zool. Soc, 



1871, p. 282. 

 Species 1. Errina aspera, Gray, I.e. Millepora aspera, Esper, Supp. 1, t. xviii. ; 



Lam., vol. ii. p. 202. 

 Species 2. Errina carinata, Pourtales, Deep-Sea Corals, p. 39, pi. vi. fig. 5. Off 



Havana, in 270 fathoms ; off Havana, 292 fathoms, Bull. Mus. Comp. 



Zool., Harvard, No. 9, vol. v. p. 211. 

 Species 3. (?) Errina fissurata, Gray, Proc. Zool. Soc, 1872, p. 742. Described 



from a drawing of the living coral. Specimen lost. Affinities doubtful. 



Dredged in the Antarctic Ocean. 

 Species 4. Errina glabra, Pourtales. Lepidopora glabra, Pourtales, Deep-Sea 



Corals, p. 40, pi. vii. figs. 8, 9. Off Havana, in 270 fathoms ; off Havana, 



100 to 458 fathoms, Bull. Mus. Comp. Zool., Harvard, No. 9, vol. v. p. 211. 

 Species 5. Errina cochleata, Pourtales. Lepidopora cochleata, Pourtales, Deep-Sea 



Corals, p. 40, pi. iii. figs. 17-19. Off Havana, in 270 fathoms ; off Havana, 



154 and 292 fathoms, Bull. Mus. Comp. Zool., Harvard, No. 9, vol. v. p. 211. 

 Species 6. Errina dabneyi, Pourtales. Lepidopora dabneyi, Pourtales, Deep-Sea 



Corals, pp. 40, 41, pi. vii. figs. 10, 11. Fayal, Azores. Depth (?). 

 Species 7. Errina labiata, Moseley, Phil. Trans. Eoy. Soc, 1878, part 2, p. 443, 



pi. i. fig. 6. Off the mouth of the Eio de la Plata, 600 fathoms ; off the 



Tristan da Cunha group, 90 to 190 fathoms. 



(IV.) Genus Distichopora, Lamarck, Hist, des Anim. sans Vert., t. ii. p. 198. 



Species 1. Distichopora violacea, M.-Edw. and H, Hist. Nat. des Cor., t. iii. p. 451 ; 

 M.-Edwards, Atlas, Eegne Animal, Zoophytes, pi. lxxxv. fig. 4, a-c, Island 

 of Timor; Fiji. 



