OF NEW SOUTH WAlES. 5^27 



raised rather broad keels, which are grooved upon the summit. 



Ifc is upon the median keel the sinus is, and it becomes granular 

 near the summit, with a rather faint but regular line of granules. 

 Between the keels there are fine thread-like lirae, sometimes they 

 are seen in the middle of the groove on the summit of the keel. 

 The canal is slender and long, and even slightly recurved. The 

 base is concave and cancellated. The apex is rather blunt, with 

 a solid smooth nucleus of two whorls. The species has no very 

 near ally, either recent or fossil. It slightly resembles P. vermi- 

 cularis Grateloup from the Piedmont and Vienna miocene. It is 

 also a little like the living P. annulata Reeve, whose habitat is 

 unknown. Rare in the Muddy Creek beds. 



Mangelia bidens. Plate 20, fig. 2. 



M. t. parva, ovato-fusiformi, turrita, spira^ apert superanti, 

 srdidhuscula, haud niiente ; anfr. 6, parum declivibus, superne 

 angulaiis, crehre, fleniose, inconspicue coslatis et distanter spirahlter 

 liratis, supra anguium creherHme striatis et costis ibi curvatis, 

 nucleo (1| anfr.) IcBvi, apertura anguste ovata ; lahro varice valde 

 incrassato, intus et ad inarginem linea granulorum dentato ; sinu 

 pro/undo, latOy canali hrevi, lato, vix recurvo, lahio definito, incoU' 

 spicuo. 



A small ovately fusiform shell, whose spire exceeds the 

 aperture slightly, rather solid, not shining. Six whorls, slightly 

 sloping, angular above, with many flexuous inconspicuous ribs 

 and distinctly lirate. Above the angle it is closely grooved, and 

 the ribs are curved. The mouth is very peculiar, on the outer lip 

 so produced as to give the fossil the appearance of a Stromhus ; 

 it has a thickened flexaous varix, and there are two rows of teeth, 

 one on the edge and one within. The sinus is deep and thickened, 

 and very conspicuous. The canal is broad, short, and only slightly 

 recurved. Altogether the form is very different from any of our 

 numerous species of this genus, though the general character of 

 its ornamentation is the same. Its relations to any European 

 fossil seem distant. 



Deillia Trevort. pi. 20, fig. 4. 



D. parva, elongato-fusiformi, solida, nitente, spira quam apertura 

 longiori; anfr. S^ parum convexis, 1 ongitudinaliter costatis^ spiraUter 



