FOSSIL BRYOZOA FROM THE WEST INDIES. 83 



more specimens will prove this to be a good species. The polypidian 

 convexity is little salient; the opesiules are large and poorly defined; 

 the lateral apophyses are very little salient; the general aspect of the 

 opesium is pyriform. The ovicell is endozocecial, smooth, and salient. 



Measurements. — Opesium (including opesiules): ho = 0.20 mm., lo = 0.22 

 mm.; zooecium: Lz= 0.48 to 0.50 mm., lz=0A0 to 0.44 mm. 



Floridina antiqua Smitt, 1872, a Recent species in the Gulf of Mexico, 

 is marked by large lateral denticles and with small opesiules; its aspect 

 is quite different and its zoarium is not incrusting. 



Occurrence. — Oligocene (Antigua formation), rare at the Rifle Butts, 



Antigua, Leeward Islands (loc. No. 6854), T. W. Vaughan, collector, 



1914. Oligocene (Anguilla formation), rare along the southwest side of 



Crocus Bay, Anguilla, Leeward Islands (loc. No. 6967), T. W. Vaughan, 



collector, 1914. 



Floridina fusifera, new species. 



(Plate 1, Figure 3.) 



The zoarium is incrusting. The zooecia are hexagonal; the crypto- 

 cyst is larger than the opesium; it is of little depth and is finely granu- 

 lated; the opesium is trifoliate; the lateral apophyses are very salient; 

 the opesiules are large and rounded; the polypidian convexity is very 

 salient and convex. The onychocellarium is large, somewhat con- 

 stricted laterally, and is provided with a very large orifice. Here and 

 there are small fusiform avicularia. 



Measurements. — Opesium: ho =0.20 mm., Zo=0.18 to 0.20 mm.; zooecium: 

 Lz = 0.50 mm., Jz = 0.40 mm.; onychocellarium: opesium = 0.30 by 0.20 mm.; 

 zooecium = 0.60 by 0.36 mm. 



There are only four zocecia intact on the single zoarium obtained. 

 The presence of small fusiform avicularia has appeared to us sufficient 

 to justify the creation of this new species, this feature never having 

 been observed in the genus. 



Occurrence. — Oligocene (Antigua formation), rare at the Rifle Butts, 

 Antigua, Leeward Islands (loc. No. 6854), T. W. Vaughan, collector, 

 1914. 



Genus LUNULARIA Busk, 1884. 

 Lunularia species undetermined. 



(Plate 2, Figures 15, 16.) 



The figured specimen represents a zoarial fragment of a new species 

 difficult to classify generically. On account of its perforated internal 

 side it could be a Lunularia. The zocecia on the external side have 

 indeed the form of that of Lunularia, but the interzooecial vibracula 

 do not exist. 



Occurrence. — Lower Miocene (Bowden horizon), Rio Gurabo (zone 

 D), Santo Domingo. 



