836 DR. G. J. HINDE ON RECEPTACULITIDE. 
Genus IscHapirEs, Murch. 
Iscuapites Kaenien, Murch. (Pl. XXXVI. figs. 1, 1 a.) 
1839. Ischadites Kenigu, Murch. Silurian System, p. 697, t. 26. 
|e 
1842. Receptaculites Bronnii, Eichw. Urwelt Russlands, 2 Heft, 
p. 80, t. 1. £. 9 
1852. Selenoides iowensis, D. Dale Owen, Geol. Survey of Wis- 
consin, &c., p. 587, t. 2B. f. 13. 
1858. Receptaculites Fichwaldi, Schmidt, Die silur. Formation 
yon Ehstland, &c., p. 232. 
1860. Receptaculites Bronnii, Eichw. Lethxa Rossica, vol. 1. p. 429, 
Ppa ike 20, D: 
1860. Ischadites Kichwaldi, Eichw. id. p. 436, t. 27. f. 3 a, 6, ¢. 
1865. Receptaculites Jonesi, Bill. Pal. Foss. Can. vol. i. p. 385, 
f..363, & p. 389, f. 365. 
1865. Receptaculites cowensis, Bill. id. p. 385, f. 364. 
1866. Ischadites antiquus, Salt. Mem. Geol. Surv. Gt. Brit. 
p. 282, f. 4. 
1867. Ischadites tessellatus, Salt. MS. (see Siluria), 5th ed. p. 509. 
1868. Receptaculites globularis, Meek & Worth. Geol. Surv. Ili- 
nois, vol. ni. p. 301, t. 2. f. 2 a,b, 
1868. Receptaculites sp.?, Meek & Worth. id. p. 301, t. 2. 
£l.a,-6. 
1873. Ischadites Kenigii, Salt. Cat. Sil. & Cambr. Fossils, Cam- 
bridge, p. 100. 
1875. Receptaculites ohioensis, Hall & Whitf. Geol. Surv. Ohio, 
Pal. vol. 1.p. 125, 6..6.£ © 
1875. Receptaculites subturbinatus, Hall, 27th Annual Report 
State Museum, t. 3. f. 1, 2, 3. 
1875. Ischadites Kenignu, Giimb. Beitr. p. 43, t. A. f. 28, 29, 
30. 
1878. Ischadites Kenigii, Nich. & Ether. Silur. Foss. Girvan, 
S20: 
: 1878. Ischadites Kenigii, Quenst. Petref. Deutsch. Bd. v. p. 592. 
1880. Ischadites Keenigii, Zitt. Handb. der Pal. vol. i. p. 728. 
1830. Ischadites Kenigii, F. Romer, Leth. Pal. Th. 1, p. 291. 
1882. Ischadites Kenigii, Jones, Cat. Foss. Foram. Brit. Mus. p. 2. 
Sponges either ovate, or more or less depressed, conical; small 
individuals measuring 4 millim. in height by 6°5 millim. in width, 
and large, 40 millim. by 45 millim., with numerous gradations be- 
tween these extremes. The base is either conical with an obtuse 
termination, flattened, or concave. In the examples with flattened 
or concave bases, the greatest width is attained near the base itself; 
whilst in the forms with a conical base the specimen is widest about 
midway between the base and thesummit. The summit is generally 
slightly truncate or evenly rounded ; occasionally there is a short 
elevated neck. The summit-aperture varies from 2 to 5 millim. in 
width. The summit-plates of the spicules vary from 2 to 4 millim. 
