12 MCMURRICH. [VoL. III. 
be made out,” and perhaps the arrangement may be represented 
by the formula 6, 6, 4 (12). It would seem at all events that 
further observations are needed to authorize the establishment 
of the tribe Paractinie. 
2. A. tagetes (Duch. and Mich.), Andr. 
Synon. — Bartholomea tagetes, n.sp. — Duchassaing and Michelotti, 1866. 
Aiptasia tagetes — Andres, 1883. 
The forms which I refer to Duchassaing and Michelotti’s 
Aiptasia tagetes present considerable variation, and I am some- 
what doubtful of the propriety of the identification. The vari- 
ous forms of Azptasza resemble each other rather closely, and 
it seems to be a question if several of the described species are 
not to be considered merely varieties of one widely distributed 
species. One of the varieties I include under A. ¢agetes was 
found only on one occasion, and then in considerable numbers, 
on a sponge, and these I shall first describe, and then consider 
a second variety, found upon the under surface of the stones 
along the shore, and finally refer briefly to a small, evidently 
young, form found in large numbers in a salt lake celebrated for 
its brilliant phosphorescence, and situated on the property, on 
the island of New Providence, known as “‘ Waterloo.” It is a 
shallow lake, bounded at one end by a small mangrove swamp, 
and connected with the ocean by a narrow channel about a 
hundred yards in length. 
Var. a. Spongicola. — Under this designation I shall describe 
the form found in the sponge. The column measures about 
2.5 cm. in length, and in diameter 0.8 cm. ; in a preserved speci- 
men these measurements were respectively 0.7 cm. and 0.6 cm. 
In color (Pl. I., Fig. 2) the column is pale brownish white, rather 
darker towards the limbus, and near the margin becoming quite 
a decided brown marked with opaque white flecks. The disc 
and tentacles are brown, also flecked irregularly with opaque 
white, and the peristome and stomodzum are white. 
The base is firmly adherent, larger than the column, and suf- 
ficiently thin to allow the insertions of the mesenteries to show 
through. The limbus is very slightly crenate. 
The column is cylindrical, tapering slightly towards the top, 
and provided with a partly double band of cinclides situated on 
