New Upper Silurian Fossils. 123 



Sharp's genus, Trematis. The specific name refers to its mode 

 of growth. 



Genus RECEPTACULITES, Db Fbancb. 



RECEPTACULITES LATEEITIUS, New Species. 



Conoidal, basal margin narrowly rounded upward, base 

 slightly concave, apex obtuse. Height and greatest breadth 

 sub-equal, each about nine lines. The divisions of the ex- 

 posed portions of the surface of this species agree with those 

 of other species of this genus, but are finer than in most of 

 them. The rhomboidal cells or casts of the inner surface of 

 the ectQrhin cover the upper two-thirds, and the quadrangular 

 spaces or impressions of the inner surface of the ectorhin 

 cover the lower third of the exposed side, portions not ex- 

 posed being covered by the ectorhin itself. These divisions 

 accord with those of the late Prof. Billings' excellent paper 

 upon this genus, in Palaeozoic Fossils, Yol. II. Ehomboidal 

 spaces, 0.02 x 0.02 inch ; quadrangular, 0.02x0.06 inch. The 

 quadrangular spaces have a fanciful resemblance to a brick 

 wall, to which aspect the specific name refers. 



From the Delthyris Shale, Port Jervis, N. Y. 



Genus DIPHYPHYLLITM, Lonsdale. 



DIPHYPHYLLUM INTEGUMENTUM, New Species. 



A simple cylindrical coral belonging to the above genus is 

 tolerably abundant in strata lying about forty to fifty feet be- 

 low the Dark Blue Tentaculite Limestone, at Mr. William 

 Nearpass' quarry, in the State of New Jersey, three miles 

 south-west of Port Jervis. It has generally a dense epi- 

 thecal covering; the vertical septa are strong, forty-four in 

 the specimen were counted, springing from a broad periph- 

 eral rim, alternately longer and shorter, the longest ones 

 reaching the centre. A thin, mounted, transverse section 

 shows three divisions —an inner one, occupying about two- 

 thirds of the diameter of the calicle, closely reticulated with 

 dissepiments uniting the septa; a portion, occupying about 

 half the remaining third of the diameter, entirely without dis- 

 sepiments; and the peripheral rim. Weathered specimens 

 show a tolerably deep cup at one end. Diameter of calicle, f of 



