DR. G. J. HINDE ON RECEPTACULITINA, 841 
sellata. Kayser has also constituted a new species S. Rathi, which, 
however, appears to me not to differ from Phillips’s species. 
Distribution.—Devonian : Newton Bushell, Devonshire; Vilmar, 
Nassau; Hifel, Germany; River Jolva, near Bogoslofsk, Ural, 
Russia. 
Genus AcANTHOCHONIA, Hinde. 
ACANTHOCHONIA BaRRANDEI, Hinde, sp.n. (Pl. XXXVII. figs. 2, 
2 a-e.) 
The characters of this species have been given with those of the 
genus. The specimens vary from 20 to 50 millim. in greatest width, 
and from 7 to 15 millim. in height. The spicular plates are only 
1 millim. in width near the centre of the base, whilst those near 
the margins of the cup measure 5 millim. across. The summit- 
plates themselves appear to be thin, though their real thickness 
cannot be determined from vertical sections as they are fused into 
a crystalline mass with the horizontal rays and the basal portion of 
the verticalrays. The vertical rays are about ‘5 millim. in thickness 
and 8 millim. in length, in the lateral portions of the cup, and 
smaller near the base. 
Dstribution.—Silurian. Htage E of Barrande, Bubowitz, near 
Prague, Bohemia. 
Genus Recepraculites, Defrance. 
RECEPTACULITES NEPTUNI, Defrance. 
1827. Receptaculites Neptuni, Defr. Dict. des Sci. Nat. t. 45, p. 5, 
atlas t. 68. f. la, 15, le, 1d. 
1826-33. Coscinopor a placenta et sulcata, Goldf. Petref. Th. 1, 
prolst. 19) f. 18, 19. 
1842. Receptaculites Neptunt, Archiae & Verneuil, Trans. Geol. Soe. 
ser. 2, pt. 2, p. 407. 
1844. Receptaculites Neptuni, F. Romer, Rhein. Uebergangsgeb. 
p. 09. 
1868. Receptaculites Neptunt, Dames, Zeitsch. d. deutsch. geol. 
Gesellsch. Bd. xx. p. 483, t. 10. f. 1. 
1875. Receptaculites Neptuni, Giimbel, Beitrige, Abhandl. d. k. 
bay. Akad. der Wiss. II. Cl. Bd. xii. 1 Ab. p. 169, t. A. 
1878. Receptaculites Neptwni, Quenstedt, Petref. Bd. v. p. 596, 
t, 142. f. 20. 
1878. Receptaculites scyphiordes, Quenst. id. p. 586, t. 142.f. 15, 16. 
1879. Receptaculites Neptunt, Nich. Man. Pal. vol. i. p. 127, f. 29. 
1876-80. Receptaculites Neptunt, Zitt. Handb. d. Pal. p. 84, f. 20. 
1880. Receptaculites Neptuni, F. Romer, Leth. Pal. vol. 1. p. 290. 
tlas, t. 35. f. 7a, 6, ¢. 
1882, Receptaculites Neptun, T. R. Jones, Cat. Foss. Foram. Brit. 
Mus. p. 4. 
Sponges either shallow cup- or disk-shaped, varying in diameter 
from 65to 180 millim. The base in its centre forms a slight conical, 
sometimes curved, projection. The thickness of the walls varies 
from 3 millim. near the nucleus to 10, 15, and in one unusually 
