384 EEV. E. BOOG WATSON OK THE 



consists of a multitude of very minute hollow arches, imbricated on 

 one another. On the base of the body -whorl, coincident with the 

 upper corner of the mouth, is a small cord-like keel closely beset 

 with minute arched points. The upper third to half of the snout 

 is obliquely scored with remote raised threads rising into high, 

 sharp, arched scales. There are a few faint microscopic spiral 

 scratches. Coloitr a dead, faintly yellowish, semiporcellaneous 

 white. Spire high and conical. Apex smooth, small, but very 

 blunt and mamillate, consisting of little more than one embry- 

 onic whorl, which is tarned up on end, bent right over and spread 

 out on the next, in which the characteristic keel appears almost 

 immediately. Whorls 7, small, of very slow increase, excessively 

 keeled, with a hollowed shoulder above, rounded and constricted 

 below ; the last is contracted very much to the middle of the base, 

 which is produced into a very long and very narrow, slightly 

 flexuous, conical snout. Suture small but distinct, and sharp, in 

 the bottom of the wide constriction between the keels. Mouth 

 angularly rounded, running out into a small canal at the keel, 

 and prolonged below into the long, narrow, sinuous slit of the 

 front canal. Outer lip thin, roundly arched, sharply cut by the 

 carinal canal, and again on the base by a little canal on the basal 

 thread ; it is very much pinched-in in front, and then runs down 

 straight along the edge of the slit of the front canal. Inner lip 

 rounded at the very top ; it then runs straight to the point of the 

 pillar ; somewhat thickened above ; it joins the outer lip, and 

 stands out prominently from the body, with a deep cleft behind 

 it; it is continued down the whole pillar, standing out as a 

 sharp thin lamina. Operculum large for the aperture, thin, 

 yellow, roundedly triangular, with a terminal apex, and scored 

 across with many fine curved lines of increase, altogether much 

 like that of many of the PleurotomidsB. H. 2'18. B.0'9. Penul- 

 timate whorl, height 0*19. Mouth, height 1'72 (aperture 0*34, 

 canal 1*38), breadth 0*3. 



I have described this as a distinct species in obedience to the 

 advice of all competent judges who have been consulted ; but my 

 own belief remains unaltered that it is a mere variety of F. 

 pagoda, Less. Than that, this is a smaller shell, with a shorter 

 spire ; its carinal crown is a continuous flange, not a series of 

 hollow flat spikes, the whorls are higher between keel and suture, 

 the base is more contracted and compressed, the prickles on the 

 spiral threads of base and snout are much closer, sharper, and 



