364 Prof. P. M. Duncan on Prof. G. Lindstrom’s 
from Sind (Leptocyathus epithecata *), and with the discoid 
Trochocyathi from the Cainozoic of Australia f. 
Lindstrém describes ‘‘Leptocyathus? halianthus” (op. cit. 
p- 9, pl. i. fig. 9), and states that “this species is only pro- 
visionally to be ranged in the genus Leptocyathus, as there 
seems to be a great discrepancy in the arrangement of the 
secondary and tertiary septa, which do not unite in the pre- 
viously known species.” The form is largely fixed, with a 
broad basis; the coste are warty and spinulose. The septa 
in six cycles, each containing primaries, secondaries, tertiaries, 
and septa of the fourth and fifth orders. Lindstrom states 
that the tertiaries are united at their “ base” with the septa 
of the second order, and, again, those of the fourth and fifth 
orders are united with those of the third. But in the very 
clear drawing the septa of the fourth and fifth orders are 
straight, and do not unite with those of the third order. 
Which is correct, the drawing or the description? One must 
be wrong. The tertiary septa do unite with the secondary. 
Prof. Lindstrém is quite correct in remarking that union of 
the tertiary and secondary septa has not been noticed in the 
previously described species. In the Tertiary species of Eng- 
land and Sind and in the species from the Gault there is no 
such union. But it is hardly a generic character. The only 
distinction between Leptocyathus, Kdw. & H., and discoid Tro- 
chocyathi is the presence of pali before the higher orders in 
the first-named. This can no longer be admitted to be of 
generic value, and the genus must be absorbed in Zrocho- 
cyathus. 
What is the classificatory position of this doubtful form 
described by Lindstrém ? Lither there are pali or there are 
none; and the describer states that the slender styliform an- 
gular papille of the columella encroaching on the basis of the 
septa form, as it were, a semblance of paluli (pali). The 
basis means, according to Lindstrém, the axial end of the 
septum. 
Admitting that there are no pali, the calice strongly re- 
sembles that of Sabinotrochus apertus, nobis t; and if the 
larger septa had been prolonged, the identity of the forms 
could hardly be doubted so far as the calice is concerned. 
Unfortunately Lindstrém does not say any thing about the 
number and arrangement of the coste. If there are pali, the 
species must come within the genus Z7ochocyathus. 
* Paleont. Indica, ser. xiv., Foss. Corals of Sind, p. 60 (1880). 
t+ Quart. Journ. Geol. Soc. vol. xxvi. p. 296 (1870). 
t Duncan, “ Deep-sea Corals,” Trans. Zool. Soe. vol. viii. pt. 5, p. 320, 
pl. xl. 
