147 
2. A Monograph of Scarabus, a genus of air-br-eathing 
Gasteropodous Mollusca ; FROM SPECIMENS in the 
Cumingian Collection. By Arthur Adams, R.N., 
F.L.S. ETC. 
Scarabus, Montfort. 
Testa ovata, spira subobtusa, anfractibus compressis, varice utrin- 
que instruct™ ; apertura ovali intus utrinque dent at a ; peristo- 
mate non continuo, labro simplici, subexpanso. 
The Scarabi have the eyes sessile on the inner bases of the ten¬ 
tacles, which are short and annulated ; they live like most of the 
other genera of Auriculidce, in the damp woods and mangrove marshes. 
None have been found in the African or American regions, hut all the 
species at present known are from the East Indies. 
Scarabus imbrium, Montfort, Conch. Syst. vol. i.; Ferussac, 
Prodrome, p. 101 ; Chemnitz, Conch, vol. ix. pi. 136. fig. 1249 
& 1250. 
Helix scarabseus, Linn. —Helix pythia, Muller .—Bulimus scara- 
baeus, Bruguiere .—Auricula scarab sens, Lamarck. 
S. testa ovato-pyramidali , rufo-fusco variegatd, longitudinaliter 
vaide striata ; spira acuminata • apertura subrotundatd, spiram 
cequante; labro postice inflexo. 
Shell ovately pyramidal, variegated with red-brown, longitudinally 
strongly striated, spire acuminated; aperture subrotundate, as long 
as the spire; outer lip posteriorly indexed. 
Hab. Island of Bohol, Philippines; in dry woods, under stones, 
and in earth ; H. C. (Mus. Cuming.) 
The large size, pyramidal form and strongly striated epidermis are 
peculiar to this species : the upper tooth on the inner lip is more tri¬ 
angular, and the posterior part of the outer lip is more indexed than 
in S. Lessoni. 
Scarabus Lessoni, Blainville, Diet. Sci. Nat. pi. 48. fig. 32; 
Lesson, Yoy. de la Coquille, vol. ii. p. 334. pi. 10. fig. 4. 
Auricula Petiveriana, var. Deshayes. 
S. testa ovata , longitudinaliter substriatd, rufo-castaneo varie- 
gatd; spira lateribus cone avis; apei'tura oblong d, spira Ion - 
giore ; labio subpiano , labro postice arcuato. 
Shell ovate, longitudinally substriated, variegated with chestnut- 
red ; spire with the sides convex; inner lip rather flattened, outer 
lip posteriorly arcuated. 
Hah. New Ireland; Hinds. (Mus. Cuming.) 
The oval form and oblong mouth render this species easily distin¬ 
guished from S. imbrium : the upper tooth on the inner lip is longer, 
and two of the five teeth in the outer lip are more prominent than 
the others. 
