268 DR. J. W. GREGORY ON THE PALEONTOLOGY. [Aug. 1895, 



from the "West Indies. Mr. R. Etheridge, Jun., has referred to it a 

 fossil specimen now in the British Museum (Natural History), from 

 Madeira. The only specimens from the West Indies, with the 

 exception of those now received from Barbados, are some from 

 Trinidad in the Museum of the Geological Society. One was 

 identified by Duncan as Agaricia agaricites (Pall.) and the Other as 

 Agaricia unclata (Ell. & Sol.) ; they were recorded as such in the 

 ' Eossil Corals of the West Indies,' pt. iv. 1 They appear to be fairly 

 typical representatives of this species. 



H. latefundata is a Very well-marked species. Its nearest ally is 

 H. exesa (Ell. & Sol.) 2 — the H. microconos of Lamarck. This has 

 been especially well figured by Klunzinger. 3 H. exesa differs, how- 

 ever, by growing in hemispherical masses ; it has finer monticules, 

 which are more crowded, so that the valleys are not so con- 

 tinuous. The calicinal centres are more distinct. H. contignatio, 

 Eorsk., which has also been well described by Klunzinger, 4 has not 

 such regular ly-arranged serial monticules, which in places almost 

 unite into ' collines.' H. tenella, Quelch, 5 is another species that 

 must be compared with the new one ; H. tenella differs not only in 

 its thin contorted sheets, but by having the calycinal centres more 

 distinct : this species appears more Astraeiform than any other in 

 the genus. 



Genus Dichoccenta, M.-Edwards & Haime, 1848. 

 Species Dichocxenia Stokesi, M.-Edwards & Haime. 



Synonymy : — 



Dichocoenia StoJcesi, M.-Edwards & Haime, 1848, ' Monogr. Astr.' Ann. Sci. Nat 

 Zool. ser. 3, t. x. p. 307, pi. vii. figs. 3, 3 a ; iid. 1857, ' Hist. Nat. Cor.' t. ii. p. 200 

 Duchassaing & Michelotti, 1861, ' Mem. Cor. Ant.'" Mem. R. Accad. Sci. Tor 

 ser. 2, t. xix. p. 341 ; iid. 1866, ' Suppl. etc' ibid. p. 166 ; Duchassaing, 1870, ' Rev 

 Zooph. Ant.' p. 27 ; Pourtales, 1871, ' Deep-Sea Corals,' 111. Cat. Mus. Comp. Zool 

 no. iv. p. 68; Lindstrom, 1877, 'Contrib. Act. Atl.' Handl. k. Svensk. Vet.-Akad 

 Bd. xiv. no. 6, p. 22. 



DicJioccenia Cassioptsa, Duchassaing & Michelotti, 1861, 'Mem. Cor. Ant.' p. 341 

 iid. 1866, ' Suppl. etc' p. 166 ; Duchassaing, 1870, ' Rev. Zooph. Ant.' p. 27. 



DicJioccenia pulcherrima, Duchassaing & Michelotti, 1861, op. cit. pp. 341-342 

 iid. 1866, op. cit. p. 167; Duchassaing, 1870, op. cit. p. 27. 



Dichocoenia cequinoxialis, Duchassaing & Michelotti, 1866, op. cit. p. 167 ; Duchas 

 saing, 1870, op. cit. p. 27. 



Dichocoenia elliptica, Duchassaing & Michelotti, 1866, op. cit. p. 167, pi. ix 

 figs. 11, 12 ; Duchassaing, 1870, op. cit. p. 27. 



Dichocoenia pauciflora, Duchassaing & Michelotti, 1866, op. cit. p. 167, pi. ix 

 figs. 9, 10 ; Duchassaing, 1870, op. cit. p. 27 ; Quelch, 1886, ' Reef Corals,' Zool 

 'Chall.' Exped. pt. xlvi. p. 12. 



Dichocoenia tuberosa, Duncan, 1863, 'W. Ind. Cor.'pt. i., Quart. Journ. Geol. Soc, 

 vol. xix. p. 432, pi. xv. figs. 5 a, 5 b. 



Dichocoenia tuberosa, var., Duncan, 1864, do., pt. ii., ibid. vol. xx. p. 27 ; Duchas- 

 saing & Michelotti, 1866, op. supra cit. p. 168 ; Duchassaing, 1870, op. supra cit. 

 p. 27. 



1 Quart. Journ. Geol. Soc. vol. xxiv. (1868) p. 12. 



2 'Hist. Nat. Zooph.' p. 161, pi. xlix. fig. 3. 



3 ' Die Korallthiere des rothen Meeres,' pt. ii. Abt. ii. (1879) pp. 21-22, 

 pi. iii. fig. 1, pi. ix. fisr. 12 d. 



4 Ibid. pp. 22-23, pi. iii. figs. 2-3, pi. ix. figs. 12 a-c. 



5 ' Reef Corals collected by H.M.S. ' Challenger,' ' Zool. ' Chall.' Exped. pt. xlvi. 

 p. 96, pi. v. figs. 8-8 a. 



