14 



PROCEEDINGS OF THE NATIONAL MUSEUM 



MULTICRESCIS GALAEFERA, new species 



Plate 21, figs. 1-4 



Description. — The zoarium is large, massive, subcylindrical, hollow 

 at the base, solid at the summit, multilamellar. The orifices are 

 polygonal or subcircular, oblique, ornamented by a very short and 

 irregularly placed visor. The mesopores are polygonal, somewhat 

 smaller than the apertures. 



3Ieasurements. — Diameter of aperture, 0.08 mm. ; diameter of meso- 

 pores, 0.06 mm.; dimensions of zoarium, 2.5 byl.5 mm. 



S tructur e. — V e r y 

 probably Mvlticrescis, 

 provided with visors, as 

 in the present species, 

 belong to the family Li- 

 chenoporidae, but in the 

 absence of ovicells we 

 prefer to preserve the 

 zoarial classification. 



The longitudinal sec- 

 tion shows that the la- 

 mellae are formed by 

 orbicular subcolonies 

 united laterally. Each 

 of them arises from the 

 fl e V e 1 o p m e n t of a 

 lateral tube of an in- 

 ferior subcolony. The 

 tubes acylindrical, with 



Fig. 2.— Genus JfwZfJcresm D'Orbigny, 1881. A. MuUkrescis la- (^lorsal fCmmation aud 

 TOeHosa, new species. Portion of a transverse section, X Ifi, with 'j.! +1 • i i 11 



two lamellae. Lower Cretaceous (Valangian): Sainte-Croix, With tniCKeiieu WallS. 



Switzerland. B. -JfuWcrescts goZae/cra, new species. Meridian The meSOPOrCS are num- 

 section, X 16. The subcolonies grow from a lateral tube of an j .f 1 



inferior subcolony. Lower Cretaceous (Valangian): Sainte- CrOUS ailQ Ol Unequal 



Croix, Switzerland length. 



Occurrence. — Lower Cretaceous (Valangian) : Sainte-Croix (Vaud), 

 Switzerland (rare) . 



Cotypes. — Cat. No. 69854, U.S.N.M., and Museum Comparative 

 Zoology. 



MULTICRESCIS PARVIPORA. new species 



Plate 20, figs. 9-11 



Description. — The zoarium is globular, borne on a narrow base, 

 formed of many completely enveloping lamellae. The orifices are 

 very small, arranged in quincunx, ornamented with a very small 

 irregular visor. The mesopores are very small, polygonal, arranged 

 quite irregularly. 



