CN. 5, p. 445.) GROUPE DES SABLES INFÉRIEURS. 973 
Tornatellu sulcata, Lam., Laon, r. 
Delphinula marginata , id., Martigny, Vic, r. 
———-— turbinoides, id., Laon, etc:, c. 
* Solarium bistriatum, Desh., ibid., Urcel, Re- 
theuil, Mons-en-Laonnois. 
———— marginatum , id., Retheuil. 
Bifrontia bifrons, id., Laon , Verneuil, Vic, r. 
j -— Laudunensis, id., ibid., ibid., ibid., Sois- 
sons, Bièvres, Septvaux, etc., cc. 
Trochus aggtutinans , Variété Lam., Laon, etc., cc. 
——-— subcarinatus, Desh., Retheuil, Laon, Sois- 
sons. 
Turritella funiculosa, id., Laon , Verneuil, etc., c. 
— granulosa, id., ibid., ibid. 
———— hybride, id., Soissons, Retheuil, Laon, 
Verneuil. 
———— imbricataria, Lam., Laon, etc. 
À —-—-— id., variété b (partout), ce. 
——— incerta, Desh., Laon, Verneuil. 
———— melanoides, id. ibid., ibid. 
———— monilifera, 1d., ibid. 
* Cerithium acutum, id., ibid. 
biseriale, id., Retheuil. 
*—_—— breviculum, id., ibid. 
————— calcitrapoides, Lam., Martigny ( dou- 
teux comme gisement ). 
————— clavus, variété b, Lam., Laon, Ver- 
neuil. 
————— curvicostatum , Desh., Soissons, rr. 
————— dentatum, Def., Laon. 
————— denticulatum , Desh.., ibid. 
————— detritum, id., Retheuil. 
————— Geslini, id., ibid. 
2 —-—— — papale, id., ibid. 
————— pyramidatum , id., ibid. 
À ——— pyreniforme, id., ibid., Laon, Mar- 
tiguy, etc., c. 
————— resectum, id., Retheuil. 
————— semigranulosum, Lam., Verneuil. 
_————— stephanophorum, Desh., Retheuil. 
————— ventricosum, id., ibid. 
————— (nova sp. 2), Laon. 
————— (nova sp.), Verneuil. 
Pleurotoma attenuata, Desh. Retheuil, Laon. 
————— cancellata, 1d., ibid., ibid. 
————— colon, Sow., Soissons. 
————— crenulata, Lam., Retheuil. 
———— curvicosta, 1d., Laon, Verneuil, ce. 
————— dentata, id., ibid. 
————— inflexa, Desh., ibid. 
————— Lajonkairi, id., Verneuil, Retheuil. 
———— polygona, variété id., ibid. 
————— propinqua, id., ibid. 
————— pyrulata, id., ibid., r. 
——— _ — striolaris, id., Retheuil, Laon, r. 
Soc. GÉOL. — Tom. 5. — Mém, n° 3. 
Pleurotoma tenuistriata, id., ibid., ibid. 
_————— terebralis, Lam., ibid., ibid., Ver- 
neuil, c. 
————— turella, id., Verneuil. 
————— unduta, id., Laon. 
Cancellaria crenulata, Desh., ibid., Retheuil, r. 
—— evulsa, Sow. (variété plus courte), 
ibid., ibid., Mons-en-Laonnois. 
Fusus bulbiformis, Lam., Laon., etc., r. 
—-— costarius, Desh., Retheuil. 
—-— costellifer, id., ibid. 
—-— exigquus, id., ibid., Laon, Verneuil, cc. 
——— funiculosus, variété Lam., ibid., Retheuil. 
—+— ficulneus, id., Retheuil, Soissons. 
—-— incertus, variété a, Desh., Laon. 
—-— intortus, id., Retheuil. 
—-— longœvus, id., variété c, Laon, Bièvres ,Ver- 
neuil, c. 
—-— regularis, Sow., Laon, r. 
—-— rugosus, variété, Lam., ibid., Bièvres. 
—-— semiplicatus, Desh., Retheuil. 
—-— scalarinus, id., ibid. 
——— simplex, id., 1bid. 
—— sulcatus, id., Retheuil, Soissons. 
——— (nova sp.), (voisine du F. angustus Desh.) 
Mons-en-Laonnois. 
Pyrula tricostata, Desh., Laon, Retheuil, e.; Mons- 
en-Laonnois. 
Murex tubifer, Lam., Verneuil, r. 
spinulosus, Desh., Retheuil, Laon, r. 
——— plicatilis, id., ibid., ibid. 
Triton angustum , id., ibid., Mons-en-Laonnois, r. 
——— nodularium , Lam., Mons-en-Laonnois, rr. 
Rostelluria fissurella, variété minor, Lam., Laon, 
Verneuil, etc., c. 
——-—— macroptera, id., Mons-en-Laonnois, r. 
Cassidaria carinata, variété, Lam., Laon, Bièvres, 
Verneuil , etc., r. 
Bruccinum ambiguum, Desh., Retheuil. 
———— ovatum , id., ibid. 
stromboides, Lam., Retheuil, Soissons. 
Terebra plicatula, id., ibid. 
Mitra fusellina, id., Verneuil. 
* Voluta ambigua, Sow., Laon , Retheuil, etc., ce. 
—-—— angusta, Desh., ibid., ibid., Verneuil, 
Bièvres, c. 
——— cythara, Lam., Mons-en-Laonnois. 
_—-—— depressa, Lam., ibid., ibid. 
—-—— multistriata, Desh., Retheuil. 
——— plicatella, id., ibid. 
——— trisulcata, id., Laon, Soissons. 
——-— (nova sp.), Mons-en-Laonnois. 
Marginella ovulata, Lam., Laon. 
Volvaria acutiuscula, Sow., ibid. 
Cypræa Levesquei, Desh., Retheuil. 
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