i, 
“Contributions to the Actinology of the Atlantic Ocean.” 363 
small. They are thin and long, and are placed before the 
third cycle when the fourth and fifth orders are complete. 
They follow the law, which certainly has a meaning and 
classificatory value, that pali do not exist in relation to incom- 
plete septal cycles. There is nothing present which can con- 
found my form with Gosse’s Paracyathus ; and therefore I hold 
that the species I established from a considerable number of 
specimens, and which was considered doubtful by Lindstrém 
after the examination of one coral (which probably was not of 
the species at all), isa true member of the Caryophyllia group, 
and should retain the name I gave it. 
3. Leptocyathus Stimpsont, Pourtalés.—This coral, so in- 
teresting from its being associated with a fossil genus, was 
described by Pourtalés in 1871; he had some doubt about the 
denticulate septa taking the form out of the Turbinolide, but 
he was sure upon the point of the existence of pali (paluli), 
although those of the higher orders were not very distinguish- 
able from the columellar processes. Juindstrém states, ‘‘ There 
are no paluli, and the papille which compose the columella 
may sometimes be mistaken for paluli. The species, as well as 
the following (Leptocyathus? halianthus, Lindst.), cannot be 
classed with the Leptocyathi in the sense of Milne-Edwards 
and Haime.,” 
This criticism was answered by Pourtalés in the Report 
on the ‘ Blake’ Corals*. He wrote, ‘‘ Mr. Lindstrém doubts 
the propriety of referring these corals to the genus Lepto- 
cyathus, although he adopts the genus provisionally. He did 
not recognize the pali, which, however, If find quite distinct in 
large specimens in front of the tertiaries; but I have had no 
opportunity of direct comparison with the fossil species.” 
Prof. Lindstrém is wrong, as he might have expected he 
would be found to be, for Pourtalés was a most careful observer. 
I have two small specimens, one of which certainly is Pour- 
talés’s type, for he sent it tome named. It has pali easily 
recognizable and before all the septa, except those of the last 
order. The beautiful type of the genus from the London 
Clay ¢ and the equally elegant form described from the 
Gault { have pali before all the septa, and the principal costa 
are produced so as to give an appearance like Moseley’s 
discoid Stephanotrochus §. 
Pourtalés’s species comes into relation with an Eocene form 
* Bull. Mus. Comp. Zool. Harvard, no. 9, ii. p. 201. 
+ Palsont. Soc. Lond., Brit. Foss. Corals, 1850, p, 21. 
¢ Paleont. Soc. Lond., Brit. Foss. Corals, Supplement, pt. ii. no. 2, 
p. 34 (1870). ; Aes Eure 
§ Report on ‘ Challenger * Corals, pl. ini. fig. 5. 
265 
