556 MOLLUSCA. 
Shell of rather large size, cylindrico-oval, more or less granulated, with brownish 
periostracum ; aperture oblong, with a strong columellar fold and 1-2 parietal folds; 
outer margin of the aperture thickened, but not expanded. 
In the typical species of Auricula, A. mide and A. jude, L., of the Malayan Archi- 
pelago, the feelers are terminated by a conical smooth swelling, well distinct from the 
rest of the feelers, and the eyes are situated within the bases of the feelers, not behind 
them on the surface of the head (see Lesson, in Duperey’s Voy. de Coquille, Zool. ii. 
p. 387, t. 9. figg. 1 a-c; Souleyet, Voy. de la Bonité, Zool. ii. p. 515, t. 29. figg. 19, 20; 
v. Martens, Malak. Blatt. x. p. 126; and in Weber’s work quoted above, p. 150, t. 8. 
figg. 6, 6a). A. stagnalis and the other American forms have, however, not yet been. 
observed during life and it remains doubtful whether they really pertain to this genus. 
The typical Malayan species live on muddy ground at the mouths of rivers and 
among mangroves, partly buried in the ground or even in rotten wood. 
1. Auricula (?) stagnalis. 
Auricula stagnalis, @Orbigny, in Guérin’s Mag. Zool. 1835, p. 23'; Voy. Amér. mérid., Moll. 
p. 825, t. 42. figg. 7, 8°; Reeve, Conch. Syst. ii. p. 106, t. 187. fig. 9*; Conch. Icon. xx., 
Auricula, t. 2. fig. 34; C. B. Adams, Ann. Lyc. Nat. Hist. N. York, v. p. 484 (1852) * ; 
Pfeiffer, Monogr. Auric. p. 133°; Catal. Auric. Brit. Mus. p. 101”. 
Auricula papillifera, Kiister, in Martini & Chemnitz’s Syst. Conch.-Cab. ed. 2, Auriculaceen, p. 25, 
t. 8. figg. 9, 10 (1844) *. 
Ellobium papilliferum, Morch, Malak. Blatt. vi. p. 116 (1860) *. 
Elliptical, finely granulated, yellowish, with two parietal folds, the upper one like a knob. Long. 21-25, 
diam, 9-11; apert. long. 138-15 millim. 
Hab. Satvapvor: Sonsonate, a specimen eroded by a Pagurid (sted °). 
S.W. Costa Rica: Punta Arenas (coll. Strebel). . 
S. Panama: Chiriqui (coll. Dunker, in Mus. Berol.; coll. Strebel, in Mus. Hamburg.) ; 
Panama, under a heap of stones, just above high-water mark (C. B. Adams’). 
CotomBia: Tumaco I. (Cuming ?°"). 
Ecuapor: Guayaquil, “sur les bords des eaux stagnantes et dans les eaux stagnantes 
mémes, soit sur les branches des arbres inondés, dans un marais aux environs 
de Guayaquil ” (Fontaine } ?). 
MELAMPUS. 
Melampus, Montfort, Conch. Syst. 11. p. 8319 (1810) ; Pfeiffer, Monogr. Auric. p. 1856; Fischer 
& Crosse, Miss. Scient. Mex., Moll. 11. p. 11. 
Conovalus, Lamarck (1812); Auricula, subg. Conovalus, Férussac (1821). 
Melampus and Tralia, H. & A. Adams, Gen. Recent Moll. ii. p. 244. 
Shell coniform or oval, with short spire and long narrow aperture; outer margin 
of the aperture straight, with one or several elevated spiral ridges (lire) inside in the 
