NEVADA FOSSIL SPONGE FAUNA — BASSLER 97 



CALYCOCOELIA TYPICALIS Bassler 



Plate 21, Fioukes 3-5 ; Plate 24, P^gure 3 



The goblet-shaped form deeply excavated by the wide cloaca of 

 about 15 mm. diameter and the smooth, minutely porous surface 

 characterize this species. The type specimen is nearly 7 cm. in 

 diameter at the top, decreasing to 4 cm. at the pedunculate base. 

 The pores, arranged in regular, longitudinal, parallel series, measure 

 about 10 rows in 10 mm. 



HoJofi/pe.—V.S.'NM. No. 79637. 



Genus PATELLISPONGIA Bassler 



Sponge as usually found consisting of unilamellar fragments, some- 

 times of considerable dimensions, but originally probably broad 

 saucer-shaped expansions attached by a short stem. Under surface 

 comparatively smooth, covered by a thick dermal tissue pierced by 

 minute, closely spaced pores, which when weathered usually show a 

 regular arrangement in rows parallel to the direction of growth. 



Passing through the spicular tissue and opening at right angles 

 at the upper surface these pores reappear as more or less evenly 

 s])aced rounded canals representing the oscula, surrounded by the 

 usual spicular tissue of the family. 



Genotype. — Patellispongm oculaia Bassler. 



PATELLISPONGIA OCULATA Bassler 



Plate 22, Figxtres 1, 2 ; Plate 24, Fiottkes 1, 2 



This species forms broad lamellar expansions 12 cm. or more in 

 diameter and 1 cm. thick attached by a short peduncle. Upper surface 

 exhibiting numerous rather regularly spaced pores, the openings of 

 the oscula nearly 1 mm. in diameter with nearly 6 in 10 mm. and 

 separated by about their own diameter. Under surface smooth 

 marked by pores 0.4 mm. wide, with 9 in 5 mm. but without any 

 special arrangement. 



Holotype.—V.^.'^M. No. 79638. 



PATELLISPONGIA CLINTONI Bassler 



Plate 20, Figxjbes 5-7 



Sponge similar to the preceding in growth and other characters, but 

 the pores on the upper surface are somewhat larger, open on slight 

 elevations, and (more important from a specific standpoint) from 4 

 to 5 mm. apart. The under side of the lamella, as in other species of the 

 genus, is smooth and shows minute closely spaced pores in the spicular 



