600 DR. P. P. CARPENTER ON THE PANDORID. [Nov. 22, 
1. Ca@LODON CEYLANICUS. 
Pandora ceylanica, Sby. P. Z. 8. 1835, p. 94; Sp. Conch. f. 20, 
21, 22,=P. ceylonica, Hanl. Rec. Shells, p. 50,=P. indica, Chenu, 
Man. Conch. ii. p. 54. f. 214. 
C. t. planata, rostrata, securiformi ; ventraliter maxime, antice 
satis excurvata ; margine postico dorsali valde incurvato: 
intus, valva dextra, margine postico rectangulatim superstante, 
dentibus anticis it. prelongis, satis extantibus, usque ad cica- 
tricem adductoris continuis, dentem cavernosum valve alterius 
amplectantibus ; dente postico curtiore, extante, fossam carti- 
lagineam per totam longitudinem gerente: valva sinistra, mar- 
gine postico subrectangulatim superstante; sulco postico 
dentem v. alt. recipiente ; dentibus anticis usque ad cicatricem 
adductoris continuis, centrali longiore, plus quam dimidio inter- 
stitii lamina tenui tecto, ventraliter arcuato. 
Under this species, of which the correct locality appears in the 
name, Mr. Sowerby quotes ‘a single specimen obtained at Island 
Muerte, W. Columbia, 11 fm., by Mr. Cuming.” The hinge may 
not have been examined. The shell quoted does not now appear in 
the Cumingian collection, and probably belonged to Clidiophora 
claviculata, which in shape resembles the typical Ceelodon. 
la. CaLopon cumine, Hanl. (Pandora c.), P. Z. 8. 1861, 
p- 272. 
This agrees with the last species in shape and dentition, and is 
probably only a variety. 
Hab. Philippines (Cuming). 
2. Caiopon peticatutus, A. Ad. (Pandora d.) P. Z. 8. (diagn. 
auct.). 
...marginibus dorsalibus ad angulum cire. 160° divergentibus : 
cardine v. dextr. dente postico satis elongato; centrali curto, 
ad umbonem valde calloso ; antico longissimo, cicatricem ant. 
superante, margini contiguo: v. sinistr. dente centrali curto, 
supra cavernam evecto, in anticum prelongum continuo. 
In this species, the shape of which is not unlike P. obtusa, though 
less transverse, the anterior teeth are enormously developed at the 
expense of the central. These are short, but prominent ; in the left 
valve bent over, along the whole length, to form the roof of the 
chamber, and then drawn on into the anterior tooth. 
3. CHLODON ELONGATUS, 0. 8. 
C. ¢. parva, tenuissima, maxime planata; parte antica minore, 
excurvata ; ventraliter valde excurvata, postice maxime elon- 
gata, rostro angustiore ; dorsaliter valde incurvata : intus, v. 
dextr. dente post. satis longo; d. centrali prelongo, postice 
flecto, cicatricem adductoris parum superante ; d. antico mi- 
nore: v. sinistr. cartilagine valde elongata, postice sita; d. 
