KEPORT ON THE GASTEROPODA. 167 



5. Trophon carduelis, 1 Watson (PL X. fig. 7). 



Trophon carduelis, Watson, Prelim. Report, pt. 14, Journ. Linn. Soc. Lond., vol. xvi. p. 387. 



Station 164b. June 13, 1873. Lat. 34° 13' S., long. 151° 33' E. Off Sydney. 410 

 fathoms. Green mud. ' 



Shell, — Thin, porcellanous white, fusiform, with a high scalar spire, very small apex, 

 long, small snout, angulated whorls, scored by thin, sharp, procumbent lamellse rising on 

 the keel into high vaulted spikes. Sculpture : Longitudinals— there are on each whorl 9 or 

 10 thin, sharp, vaulted and procumbent lamellse, the old lip-edges; they are pretty prominent, 

 cross the whole whorls, are obliquely continuous from whorl to whorl, rise on the upper part 

 of the whorls into hollow, vaulted, upturned, and reverted spikes, and are traceable to the 

 point of the snout ; between these lamellae are slight lines of growth. Spirals — above 

 the middle of each whorl there is an angulation, the effect of which is greatly increased 

 by the coronal of spikes which project at this point; one or two very depressed rounded 

 threads, parted by minute linear furrows, are also found on this angulation ; similar but 

 feebler and very irregular threads and furrows cover the rest of the surface. Colour por- 

 cellanous white, with a smooth but not polished surface. Spire high, scalar. Apex 

 small, consisting of two smooth, rounded, globose, embryonic whorls, the extreme tip of 

 which is very small and is slightly turned over and immersed. Whorls about 10, flatly 

 sloping above, angulated and coronated, conically contracted to the lower suture ; they 

 are all small but the last, which is slightly tumid, with a rounded and shortly produced 

 base prolonged into a projecting, narrow, slightly reverted snout, which is a little bent at 

 the point. Suture small and sharp, interrupted by the lamella?, but very strongly marked 

 by the deep constriction of the whorls. Mouth club-shaped, being oval above and pro- 

 duced into the long narrow canal. Outer lip sharp and thin, leaves the body at a right 

 angle, advances straight to the keel, where a patulous canal is formed in the spike ; below 

 this the lip is extremely patulous, and well arched to the origin of the canal, where the 

 lip is sharply pinched-in, and from this point runs direct, but a little obliquely, to the 

 point of the snout, where it is squarely cut off. Inner lip is a little concave above, 

 straight on the pillar, slightly oblique down the canal ; it is defined on the body and 

 pillar by a thin, narrow, patulous pad ; this pad crosses the pillar, and runs into the canal, 

 along the side of which it shows only a thin sharp edge, with a small chink behind it. 

 Operculum thin, yellow, ovate, acute, with a terminal apex, and corrugations and strife in 

 the curves of growth. H. l - 27in. B. (spines included) - 8, (excluded) 0'5. Penultimate 

 whorl, height 0'19. Mouth, height 0"8, breadth 0-31. 



1 I have failed to approach the idea of " thistly " nearer than by this, the name of the Thistle-Finch, which 

 really ought to have had the same latitude as its Greek equivalent axatSlg. The prickles on this species of 

 Trophon recall strongly those of the involucre of some thistles. 



