72 
OSCULirOKID^. 
D. 7377. The base of a zoarium. Albian — zone of Schloenbachia rostrafa 
Haldon Hills, south-west of Exeter. W. Vicary Coll. Be- 
queathed 1903. 
D. 7378. The base of a zoarium. Albian — zone of Schloenhachia rostrata. 
Haldon Hills, south-west of Exeter. W. Vicary Coll. Be- 
queathed 1903. 
Foreign*. 
D. 3610. Five irregular branches, of which one is 10 mm. long and 3 mm. 
wide ; the pinnules are flat, and the form approaches to 0. repens. 
Cenomanian — Essener Griiusand. Essen. Old Coll. 
D. 3611. Two zoaria, one broken to show both obverse and reverse faces. 
Essener Griinsand. Essen. Old Coll. 
D. 3612. A very Avorn zoarium in Avhich the reverse side accordingly appears 
porous, and the apertures appear, oAving to the Avorn condition, to 
be spread over the AA’hole obverse face. Essener Griinsand. Essen. 
Old Coll. 
D. 3693. Six fragments of zoaria, one of Avhich shoAvs the gonoccium. Ceno- 
manian. Le Mans. Tesson Coll. 
D. 3708. A worn basal fragment. Cenomanian. Le Mans. Tesson Coll. 
D. 3691. A zoarium encrusted by Cheilostomata. Cenomanian. lie Mans. 
Tesson Coll. 
2. Homoeosolen tetragonus (Michelin), 1846. 
Syxonymy. 
Idmonea tetragona, Michelin, 1846. Icon. Zooph. p. 219, pi. liii. fig. 19. 
Trnncatula ,, d’Orbigny, 1854. Bry. Cret. p. 1056, pi. 796, tigs. 10-14. 
,, ,, Pergens, 1890. Eev. p. 385. 
non ,, ,, Vine, 1893. Compl. Rep. : Rep. Brit. Assoc. 1892, p. 334. 
,, ,, Canu, 1897. Bry. St. Cal. : Bull. Soc. geol. France, ser. 3, 
vol. XXV. p. 748. 
'? ,, ,, Canu, 1900. Geol. Romorantin : vol. xxAuii. p. 104. 
,, ,, Canu, 1903. Faune Cr. Villedieu : ibid. ser. 4, a*o1. iii. 
p. 268. 
,, subpinnata, d’Orbigny, 1854. Bry. Cret. p. 1055, pi. 796, figs. 6-9. 
,, ,, Pergens, 1890. Rev. p. 385. 
non ,, ,, Vine, 1893. Compl. Rep. : Rep. Brit. Assoc. 1892, p. 334. 
Osculipova aculeata, pars, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 177. 
,, lateralis, d’Orbigny, 1850. Ibid. p. 177. 
Diagnosis. 
Zoarium of long, slender stems, xvliicli dichotomize occasionally. 
The stems are slightly flattened, and bear numerous short, 
simple, lateral processes, which are sharply reflexed from 
the plane of the stem. Reverse face of the zoarium with 
long, raised ridges, Avhich are continued along the lateral 
