APPENDIX MOLLD8CA. 



559 



CAECUM AMALTHEANUM, Sp. nov. 

 (Fig. 75.) 



Shell small, a twisted cone, performing about 

 a third of a revolution, rapidly enlarging. White 

 very glossy, with about twenty, faint rib rings. 

 Aperture circular, slightly contracted behind 

 the everted lip. Septum gradate, with three 

 steps, arising deep within the collar, peaked on 

 the outer side. Length -76; breadth at aperture 

 34 mm. 



Two examples dredged at 36 fathoms, north 

 of Pava Islet. 



The contour of this species isolates it from 

 any co-generic type. 



dECUM LEGUMEN, Sp. HOV. 

 (Fig. 76.) 



Shell pod-shaped, arched on one side, nearly 

 straight on the other ; rounded in transverse 

 section on the arched side and flattened on the 

 straight. Colour white. Sculptured by fine 

 growth rings, surface glossy and shining. At the 

 aperture slightly contracted, mouth oval, flattened 

 on one side. Septum much exserted, peaked on 

 the curved side. As foreshortened to show the 

 aperture in my drawing, the shell has a quaint 

 resemblence to a tobacco pipe. Length 1*5; 

 breadth -64 mm. 



Dredged at 36 fathoms N. 30 W. of Pava Islet 

 and again at 150 fathoms off Beacon Islet (Funamanu). 



The only species at all resembling this, figured in 

 Tryon's Manual, is C. nitidunt, Stimpson, than which it 

 is less inflated. 



TRIFORIS ASPEBRIMUS, Hinds. 



(Fig. 77.) 

 Hinds, Ann. Mag. Nat. Hist., xi., 1843, p. 18 ; Tryon, 



Man. Conch., ix., 1887, p. 181, pi. xxxviii., fig. 6. 

 A single, probably immature, specimen of twelve 

 whorls, in length 2*92 and in breadth -56 ram., which 

 was dredged in 36 fathoms, north of Pava Islet is thus 

 doubtfully determined. The species appears not to have 

 been seen since Sir Edward Belcher dredged his unique 

 specimen in eight fathoms on the Papuan coast. 



Fig. 75. 



Fig. 77. 



