244 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
In deseribing the species, two additional characters of importance are stated: 
“ The synapticul are well developed,” and “The coste are well developed, 
and often not continuous with the septal ends.” No discussion of the charac- 
ter of the wall is given, but both Figures 13 and 14, Plate XV., represent a per- 
forate or synapticulate composition. Figure 18 of the same plate illustrates the 
noteworthy condition of the coste alternating with the septa. Figure 16, repre- 
senting a calice natural size, shows an apparently imperforate wall, though not 
of uniform thickness, and the septa in the majority of cases corresponding in 
position to the coste. The type species needs a new study, and we cannot 
have a clear conception of its characters until this is made. 
Duncan, in his paper on the St. Bartholomew eorals,! described six species” 
that he referred to Turbinoseris, but no additional data on the generic charac- 
ters are given. He speaks of the wall being “thick” in most of the species, 
and both mentions and figures synaptieulo between the coste. 
He considers the genus again in his Revision of the Genera of the Madrepo- 
raria? but, excepting the statement that the septa are solid and the wall stout, 
no additional information is given. The genus is classed in the “ Lophoseridw,” 
* F'unging in which the wall is neither perforate nor echinulate,” ete.® 
From a comparison of the figures of the two species herein described with 
those of the species of Turbinoseris from St. Bartholomew, given by Duncan 
in Volume X XTX, of the Geological Society of London, the generic identity 
of the forms is most apparent. "The only possible opportunity for error would 
be in the wall of the St. Bartholomew corals being imperforate, but I cannot 
believe this with Duncan’s figures before me, Therefore I have referred the 
two Jamaican corals to Turbinoseris on the strength of their resemblance to 
the species from St. Bartholomew, but whether Duncan was correct in refer- 
ring the latter corals to that genus must be left to future work. 
Especial attention should be called to Zurbinoseris jamaicaensis, as, besides 
the synapticule between the distal ends of the septa, quite often the septal 
ends are solidly united by a thecal or pseudo-thecal thickening. 
The similarity in the general structural features of these two species to that 
of Leptophyllia deserves a note. The septal structure (i. e. the septa are com- 
posed of ascending trabecule) is the same, except that in the species of Lepto- 
phyllia the trabecule are not fused together to a great extent, whereas in 
Turbinoseris the fusion is so complete or so nearly complete and septal per- 
forations are so rare that the septa can best be considered solid, The character 
of the columella and that of the wall (or absence of wall) in both are respect- 
ively of the same type, the latter structure in Turbinoseris is not so loose as in 
Leptophyllia, and, as already stated, in Turbinoseris there is in places theca or 
pseudo-theca. The typical species of Leptophyllia are attached by broad bases. 
1 Quart. Jour. Geol. Soc. London, 1878, Vol. XXIX. pp. 558-561. 
2 Jour. of the Linn. Soc. (Zoölogy), 1884, Vol. XVIII. p. 148, 
3 Op. cit, p. 140. 
