FOSSIL BRYOZOA FROM THE WEST INDIES. 77 



Class BRYOZOA. 



Order CHEILOSTOMATA Busk. 



Suborder ANASCA Levinsen. 



Group MEMBRANIPOM: Canu and Bassler. 



Genus CONOPEUM Norman, 1903. 



Conopeum ovale, new species. 



(Plate 5, Figure 6.) 



The zoarium incrusts shells. The zooecia are oval, elongate, distinct, 

 separated by a' deep furrow; the mural rim is wide, flat, almost smooth; the 

 opesium is elliptical or oval. 



Measurements. 1 — Opesium : ho = 0.30 mm., lo = 0.15 mm. ; zocecium : Lz = 0.35 

 mm., ib = 0.25 mm. 



Affinities. — The figured specimen is the only one that has been 

 found and as it is incomplete it is impossible for us to present a detailed 

 study of the species. The ancestrular zocecia are calcified. A small 

 avicularium appears to be present between the mural rims of some 

 zocecia. 



Occurrence. — Lower Miocene (Bowden marl), Bowden, Jamaica 

 (very rare). 



Genus MEMBRANIPORA Blainville, 1834. 



Membranipora vaughani, new species. 



(Plate 2, Figure 1.) 



Cfr. Membranipora tuberculala Busk, Fossil Polyzoa of the Crag, Paleontographical Society, 

 p. 30, plate ii, fig. 1, 1S59. 



Measurements.— Opesium: ho = 0.32 to 0.36 mm., Zo=0.22 to 0.24 mm.; 

 zocecium: Lz= 0.40 to 0.44 mm., lz = 0.32 mm. 



The figured specimen is the only one found. It incrusts a small, 

 very convex mollusc which has deformed the zooecia by its shape. 

 This is not the species of Busk, 1858, nor that of Bosc, 1830, which it 

 resembles only in the presence of large interopesial tubercles, but we 

 can not fully define a new species upon such a minute fragment. 



The figured specimen is really too large in its micrometric measure- 

 ments to be compared with the species figured by Busk, 1859. 



Lower Miocene (Bowden horizon), Cercado de Mao (Bluff 3), Santo 



Domingo. 



CUPULADRIA, new genus. 



Etymology. — Modification of Cupularia. 



No ovicell. The zoarium bears vibracula. No gymnocyst. 



Genotype. — Cupuladria (Cupularia) canariensis Busk, 1859. 



Range. — Miocene-Recent. 



The genotype does not belong at all to the genus Cupularia as we 

 now understand this genus and as it is defined by its type species. 

 There are neither opesiules nor cryptocyst. Previously, Smitt, in 1872, 



x In the citation of measurements, ho is the length and lo the width of the opesia, Lz and lz simi- 

 larly the length and width of the zocecia, Lv and h the same for the vibraculum, Lon and 

 Ion for the onychocellaria, ha and la for the apertura, etc. 



