273 
(N. 3, p. 145.) GROUPE DES SABLES INFÉRIEURS. 
Tornalella sulcata , Lam., Laon, r. 
Delphinula marginata , id., Martigny, Vie, r. 
- turbinoides , id., Laon, etc., c. 
* Solarium bistriatum , Desh., ibid., Urcel, Re- 
theuil, Mons-en-Laonnois. 
- marginatum , id., Retheuil. 
Bifrontia bifrons , id., Laon , Verneuil, Vie, r. 
* - Laudunensis , id., ibid., ibid., ibid., Sois- 
sons, Bièvres, Septvaux , etc., ce. 
Trochus agglulinans , variété Lam., Laon, etc., cc. 
- subcarinatus , Desh., Retheuil, Laon, Sois- 
sons. 
Turritella funiculosa , id., Laon , Verneuil, etc., c. 
- granulosa , id., ibid., ibid. 
- hybrida , id., Soissons, Retheuil, Laon, 
Verneuil. 
--— imbricataria , Lam., Laon, etc. 
* -id., variété b (partout), cc. 
- incerta , Desh., Laon , Verneuil. 
- melanoides , id. ibid., ibid. 
- monilifera , id., ibid. 
* Cerithium acutum , id., ibid. 
—*- biseriale , id., Retheuil. 
* - breviculum , id., ibid. 
- calcitrapoides , Lam., Martigny (dou¬ 
teux comme gisement). 
-— clavus, variété i, Lam., Laon, Ver- 
neuiî. 
- curvicostatum , Desh., Soissons, rr. 
- dentatum , Def., Laon. 
- denticulatum , Desh., ibid. 
—- detrilum , id., Retheuil. 
-- Geslini, id., ibid. 
* - papale , id., ibid. 
- pyramidatum, id., ibid. 
*—-- pyreniforme , id., ibid., Laon, Mar¬ 
tigny, etc., c. 
- resectum , id., Retheuil. 
- semigranulosum , Lam., Verneuil. 
- stephanophorum , Desh., Retheuil. 
- ventricosum , id., ibid. 
- (nova sp. 2), Laon. 
- (nova sp .), Verneuil. 
Pleuroloma altenuata , Desh. Retheuil, Laon. 
- cancellata , id., ibid., ibid. 
-co/on, Sow., Soissons. 
- crenulata , Lam., Retheuil. 
- curvicosla , id., Laon , Verneuil, c. 
- dentata , id., ibid. 
- inflexa, Desh., ibid. 
- Lajonkairii , id., Verneuil, Retheuil. 
- polygona , variété id., ibid. 
- propinqua , id., ibid. 
- pyrulata , id., ibid., r. 
-- slriolaris, id., Retheuil, Laon, r. 
Soc. GÉOL. — Tom. 5. — Mcm, n ( > 3. 
Pleurotoma tenuislriata , id., ibid., ibid. 
- terebralis , Lam., ibid., ibid., Ver¬ 
neuil , c. 
- turella , id., Verneuil. 
- undata , id., Laon. 
Cancellaria crenulata , Desh., ibid., Retheuil, r. 
- evulsa , Sow. ( variété plus courte ), 
ibid., ibid., Mons-en-Laonnois. 
jfusus bulbiformis , Lam., Laon., etc., r. 
- costarius, Desh., Retheuil. 
- costellifer , id., ibid. 
—— exiguus , id., ibid., Laon , Verneuil, ce. 
- funiculosus , variété Lam., ibid., Retheuil. 
—-— ficulneus , id., Retheuil, Soissons. 
- incertus , variété a, Desh., Laon. 
- intorlus , id., Retheuil. 
- longœvus , id., variété e, Laon, Bièvres,Ver¬ 
neuil, c. 
- regularis, Sow., Laon, r. 
- rugosus , variété , Lam., ibid., Bièvres. 
- semiplicalus , Desh., Retheuil. 
- scalarinus , id., ibid. 
- simplex , id., ibid. 
- sulcatus , id., Retheuil, Soissons. 
- (nova sp .), (voisine du F. angustus Desh.) 
Mons-en-Laonnois. 
Pyrula tricostata, Desh., Laon, Retheuil, c.; 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. 
Rostellaria fissurella, variété minor, Lam., Laon , 
Verneuil, etc., c. 
- macroptera , id., Mons-en-Laonnois, r. 
Cassidaria carinata , variété, Lam., Laon, Bièvres, 
Verneuil, etc., r. 
Buccinum ambiguum , Desh., Retheuil. 
- ovatum , id., ibid. 
- stromboides , Lam., Retheuil, Soissons. 
Terebra plicatula , id., ibid. 
Mitra fusellina, id., Verneuil. 
* Uo/wta ambigua , Sow., Laon , Retheuil, etc., cc. 
-— angusta , Desh., ibid., ibid., Verneuil, 
Bièvres, c. 
- cythara, Lam., Mons-en-Laonnois. 
- depressa , Lam., ibid., ibid. 
- mullistriata , Desh., Retheuil. 
- plicalella, id., ibid. 
- trisulcala , id., Laon, Soissons. 
-(wma */>•), Mons-en-Laonnois. 
Marginella ovulata , Lam., Laon. 
Volvaria aculiuscuta , Sow., ibid. 
Cyprœa Levesquei , Desh., Retheuil. 
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