92 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



The fossil specimens from Anguilla closely resemble Smitt's figures 

 173 and 175. 



American occurrence. — Oligocene (Anguilla formation), rare along 

 the roadside, descent to Crocus Bay from Valley, Anguilla, Leeward 

 Islands, loc. 6893, T. W. Vaughan, collector, 1914. 



Geological distribution. — Helvetian of Italy (Seguenza), of Sardinia 

 (Neviani), of Touraine (Michelin); Zanclean of Italy (Seguenza); 

 Sahelian of Oran (collection Canu); Plaisancian of England (Busk), of 

 Italy (Manzoni); Sicilian of Italy (Neviani, Waters); Quaternary of 

 Italy (Neviani); Miocene of Australia (Waters, MacGillivray). 



Habitat. — Very cosmopolitan, even to the polar regions. It has been 

 dredged to a depth of 245 meters, but in Florida it lives at a depth of 

 15 to 97 meters. 



Genus GEMELLIPORELLA Canu and Bassler. 



Gemelliporella punctata, new species. 



(Plate 5, Figures 7 to 9.) 



The following is a description of this species: 



The zoarium is free, cylindrical, bifurcated. The zocecia are very little 

 distinct, elongate, convex; the frontal is granular and surrounded with areolar 

 pores and is sometimes covered with punctations of pleurocystal origin. The 

 aperture is oval, elongate, formed of a large semilunar anter and of a wide 

 proximal sinus. The ovicell is deeply embedded in the distal zocecium, little 

 salient, closed by the operculum, ornamented by an orbicular and very 

 fragile frontal area. 



Measurements. — Apertura: ha=0.17 mm., Za=0.10 mm.; zocecia: 1,2=0.55 

 mm., lz=0A0 to 0.45 mm. 



Affinities. — The punctations of the frontal are quire variable; there 

 is not a single zooecium similar to another. In a better preserved state 

 we think that each zocecium is surrounded with areolar pores irregular 

 in size and spacing. The frontal is a thick and compact olocyst, 

 covered by a pleurocyst which is granular or punctured with large pores 

 which do not perforate the zooecial walls. Unfortunately we have not 

 been able to confirm this exterior aspect by sections. 



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

 (rare). 



Genus HIPPOMENELLA Canu and Bassler, 1917. 



Hippomenella infratelum, new species. 



(Plate 6, Figure 2.) 



The following is a description of this species : 



The zoarium is a narrow Eschara borne on an expanded base. The zocecia 

 are elongate, distinct, elliptical; the frontal is convex, surrounded by a line of 

 small areolar pores and formed of a pleurocyst very finely granulated. The 

 apertura is elliptical, elongate, with two very small cardelles. The avicularium 

 is salient, elliptical, with pivot placed on the line of pores in the lower part of 

 the zocecium. 



Measurements. — Apertura: ha=0.1Q to 0.20 mm., Zo=0.14 mm.; zooecium: 

 Lz = 0.60 to 0.70 mm., Iz = 0.40 to 0.50 mm. 



