28U 



keels joining at the apex to form a tongiie : the second whorl 

 shows the beginning of a third keel, infrasntural, and dis- 

 tinctly smaller ; the interspaces are concave and microscopi- 

 cally axially striate. Spire-whorls 20, with three spiral ribs; 

 one immediately beneath the suture is the narrowest, flat 

 on its posterior surface and nearer the middle one than is 

 the lowest ; about one-half the width of the interspaces ; nod- 

 ular, especially the central rib ; nodules transversely elon- 

 gate, fully twice as long as broad, joined in the interspaces 

 by oblique, low, very broad, rounded axial costae, much 

 wider than their interspaces : faint microscopic accremental 

 striae. The last 6 whorls have a supra -sutural smooth thin 

 ledge. Aperture broken. Colour uniformly light-horn tint; 

 the posterior spiral distinctly darker. 



Dim. — Length, 12 mm. (probably 14 when perfect): 

 breadth, 16 mm. 



Locality. — Type Gulf St. Vincent, depth xmrecorded, 

 with 2 other examples ; in 55 fathoms off Cape Borda, 1 dead. 



One of the co-types shows two smooth spirals on the 

 base, a nearly oblong mouth, and an anterior canal, curved 

 to the left, reflected and notched. 



Triphora spina, n. sp. PI. xxii., tigs. 2, 3, and 4. 



Shell sinistral, elongate-subulate-pyramidal. Protoconch 

 of 4 turns, apex prominent and tongue-like, whorls smooth, 

 centrally boldly angled, concave between the median angu- 

 lations. Suture linear. Spire-whorls 17, with four ribs; 

 the largest is the continuation of the nuclear angulation ; 

 above this is a much smaller infra-sutural rib, below it the 

 •shell wall seems thinner and less opaque ; then comes a bold 

 rib, and close below it a supra-sutural rib. They are slightly 

 tuberculate with low transverse nodules, united by low broad 

 oblique axial costse, most marked between the upper two 

 ribs, but connecting the upper three ; the supra-marginal 

 rib is smooth, and wedged in between the two adjacent ribs. 

 Aperture roundly rhomboidal ; outer lip crenulated by the 

 spirals, antecurrent into a spur towards the front ; canal 

 nearly closed at this point, curved to the left, and reflected ; 

 back of the aperture pinched at the suture, but no sutural 

 notch. Base smooth, with one spiral. Colour, light-amber 

 tint. 



Dim. — Length, 12'4 mm. ; width, 1'9 mm. 



Locality. — Type, 110 fathoms off Beachport, with 2 

 others perfect and 11 broken, in 150 fathoms 6 moderate, 

 and in 200 fathoms 3 poor ; in 90 fathoms off Cape Jaffa, 7 

 perfect and 14 broken, and in 130 fathoms 3 broken. 



