246 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
Turbinoseris jamaicaensis, sp. nov. 
Plate XL. Figs. 8-10. 
Corallum subeonical, tip oí base a small nipple-like pedicel. Height of 
corallum, 19.5 mm.; greater diameter, 15 mm.; lesser, 13.5 mm. The ex- 
ternal surface covered with small, densely crowded granulate costo, alternately 
larger and smaller in size ; synapticulee abundant between them. The wall is 
for the greater part synapticulate and perforate, but in places it is solid to a 
greater or less extent, Septa very numerous and very much crowded; there 
are over 100, so there are more than five cycles, but the sixth is not complete; 
their margins apparently finely dentate; the septa of the lower cycles are 
thicker around the axial space than peripherally. The calicular fossa is 
narrow and deep. "There is no columella, but some of the prineipal septa 
meet in the axial space. 
Locality. Near Cambridge Station, south of Montpelier, St. James Parish 
(R. T. Hill, collector). 
Type. Museum of Comparative Zoólogy, Harvard University. 
Remarks. This species differs from the preceding, T. cantabrigiensis, by its 
more robust form, and the inner thickening of the larger septa. The calicular 
fossa is deeper and narrower. It is closer to Z. coceenica, Duncan, from which 
it differs in its form. The axial ratio for T. eocemica is Mm: for T. ja- 
maicaensis, yo"; the former is much more compressed laterally, 
lt is evident that T. cantabrigiensis and T. jamaicaensis are very close to 
each other, and both are extremely near to T. eocenica, but as differences of 
considerable importance exist between all three of the forms, it is best to 
regard them as specifically distinct. 
MESOMORPHA, Prarz. 
Mesomorpha catadupensis, sp. nov. 
Plate XLI. Figs. 1-3. 
Corallum depressed, flat above, transverse outline, subelliptical. Measure- 
ments: height (thickness), 7 mm.; greater distance across, 26 mm. ; lesser 
distance across, 24 mm. The base of the corallum has on it some concentric 
folds, and there is an incomplete epitheca. The costo are low, equal, and 
have synapticule between them. The outer or common wall probably is 
synapticulate, i. e. probably there is none, strictly speaking. The calices are 
concentrically arranged, In the centre is a larger calice, outside of it are two 
concentric rings, and near the edge of the corallum some small calices belong- 
ing to à third one. From the central calice to the calices of the first ring 18 
5.25 mm. The calices in the first ring are usually 4 mm. apart. There is à 
slight variation above and below this number. The distance between the first 
