Hindis. 1 



SPONGES, GRAPTOLITES, CORALS. 79 



HETEROSPONGIA SUBRAMOSA ! Ulrich. 



PLATE G, FIGS. 4-(i. 



1889. Heteroispcmgia subramosa ULRICH. American Geologist, vol. iii, p. 240, fig. 6 on p. 236. 

 1891. Heterospongia subramosa JAMES. Jour. Cincinnani Soc. Nat. Hist., vol. xiv, p. 71. 



Original description." Sponge subramose, occasionally palmate ; branches more 

 or less flattened, from 9 to 13 mm. thick and 11 to 30 mm. wide. The largest speci- 

 men seen is 65 mm. high and 45 mm. wide. Surface generally even, exhibiting the 

 rather irregularly distributed canal apertures. These are generally of very unequal 

 sizes, though on limited portions of the surface, both their distribution and size may 

 be fairly regular. The average diameter of an aperture is nearly 0.7mm., with about 

 5 in 5 mm. The width of the interspaces between the canal mouths is equally 

 variable, the extremes being 0.2 and 1.2 mm. The sponge skeleton is .composed of 

 more or less loosely interwoven spicule-fibres, but in the usual state of preservation 

 in the inter-canal spaces appear quite solid and structureless. In none of the speci- 

 mens are the spicules sufficiently well preserved to make their determination a 

 matter beyond dispute." 



Formation and locality. Rare in the Hudson River group at Spring Valley, Minnesota. Common 

 in the same formation in Marion and Lincoln counties, Kentucky. 



. Collector. E. O. Ulrich. Type in Mr. Ulrich's collection. 



Order LITHESTID^E, Schmidt. 



? Family TETRACLADINA, Zittel. 



HINDIA, Duncan. 



1879. Hindia, DUNCAN. Annals and Mag. Nat. Hist., ttfth ser. vol. iv, p. 84. 



1883. Hindia, HINDE. Catalogue Fossil Sponges, British Museum, p. 57. 



1886. Hindia, RAUFK. Sitzungsb. der Niederrh. Gesell. zu Bonn : Sitzung vom 10 Martz. 



1887. Hindia, HINDE. Annals and Mag. Nat. Hist., fifth ser. vol. six, p. 67. 



1890. Hindia, ULRICH. Geol. Survey Illinois, vol. viii, p. 226. 



1891. Hindia, JAMES. Jour. Cincinnati Soc. Nat. Hist., vol. xiv, p. 56. 



HINDIA PARVA Ulrich. 



PLATE G. FIGS. 7-9. 



1889. Hindia parva ULRICH. American Geologist, vol. iii. p, 244. 



1889. Microspongia parva MILLER. North American Geology and Palaeontology, p. 161. 



1891. Microspongia greyaria (partim) JAMES. Jour. Cincinnati Soc. Nat. Hist., vol. xiv, p. 54. 



Original description. "Sponges free, globular in form, with an even rounded 

 surface. Specimens vary between 5 and 10 mm. in diameter, but in a large propor- 

 tion of the specimens seen, the diameter varies but little from 7 or 8 mm. 



