.326 Chapman and Gabriel : 



nest described, and the shell is smooth; otherwise it somewhat re- 

 sembles that species in general contour and in the arrangement 

 of the plaits. 



Distribution.— Bore 10, 225-230 feet. 



Marginella praeformicula, sp. iiov. (PI. XXVIII., Fi<<. 35). 



Description. — Shell of medium size, volutiform. of solid build. 

 Spire of medium length, conspicuously exserted. Whorls four, con- 

 vex, and with about ten sharp plications on the shoulder of the 

 body whorl. Sutures with a flattened, depressed area. Aperture 

 long, sinuous and expanded anteriorly. On the dorsal aspect of 

 the shell the lip margin is limbate, or thickened wdth a varix. 

 Columellar plaits four, the anterior large and oblique, the two 

 posterior small and transverse. 



Dimensions. — Length, 8.5 mm. ; greatest width, 5 mm. 



Affinities. — The nearest form to the above species is the living 

 Australian Marginella formicula, Lamarck. ^ In that shell, how- 

 ever, the plicae are more numerous and less acute; the whorls are 

 more tabulate; the outer lip less expanded posteriorly; and the 

 number of whorls five, against four in M. praeformicula. The 

 fossil species foreshadow^s all the characters of the above-mentioned 

 living form so closely that there can be little question of its being 

 ancestrally related. 



Distribution.— Bore 3, 201-220 feet; 226 feet. Bore 5. 155-159- 

 feet; 175-189 feet. Bore 6, 114-150 feet; 158-161 feet. Bore 7. 

 142 feet 3 inches-155 feet. Bore 8. 165-180 feet; 180-199 feet; 199- 

 204 feet. Bore 9, 315-325 feet. 



Fam. TEREBRIDAE. 



Genus TEREBRA, Lamarck. 



Tkkehra profunda," sp. nov. (PI. XXVIII., Fig. 36). 



Description. — Shell cerithioid, elongate, consisting of nine- 

 broad, convex whorls and a protoconch of two and a-half whorls. 

 Longitudinal costae nine on each whorl, subacute and transversely 

 scored by fine sulcose lines, eight on the penultimate whorl. Sur- 

 face of whorls posteriorly depressed concave, anteriorly convex. 

 Sutures deeply impressed. Aperture subquadrate. 



Dimensions. — Length, 10.75 mm.; greatest with. 3.25 mm. 



Distribution.— Bore 10, 225-230 feet. 



1. Anim. sans Vert., vol. x.. 1822, p. 441. Reeve, Conoh. Icon., vol. xv., 1864, pi. viii_ 

 figs. 28a, h. 



2. Tli.it is, obtained hy deep boring. 



