new Species of Pleurotomide. 301 
striati, ceeteri leves, convexiusculi, tenuiter spiraliter incremen- 
tique lineis striati; anfr. ultimus magnus, cauda oblique sulcata 
terminatus; apertura latiuscula, longit. totius ;% adaquans ; 
labrum leviter incrassatum, ad marginem dentatum, juxta sutu- 
ram sinuatum ; canalis brevis, vix recurvus, paululum obliquus. 
Long. 19 mill., diam. 7. 
Hab. Swan River, West Australia (G. B. Sowerby). 
Although this species has considerable likeness to P. ris- 
soides, Reeve, it is very different in several respects. The 
proportion of the last whorl to the entire shell is much larger 
in the present species, occupying nearly two thirds of the 
entire length, whereas in P. rissoides it only extends to a 
little more than halt of it. The spiral striation, the less con- 
vex whorls, and the absence of coloration at the apex are the 
characters by which this species may be known. 
Pleurotoma (Daphnella) tenuiclathrata. 
Testa ovata, tenuis, semitranslucida, albida, dilutissime luteo tincta, 
versus basim anfr. superiorum et circa medium anfr. ultimi zona 
irregulari lactea opaca cincta; anfract. 9?, apicalibus 3 abrup- 
tis superiores reliqui 3-4 costis longitudinalibus ad 8 et liris 
fortibus transversis 2-3 cancellati, ceteri convexi, liris longitudi- 
nalibus tenuissimis spiralibusque paululum crassioribus et pul- 
cherrime granulatis (paucis hic illic quam ceterz majoribus) 
exiliter cancellati; apertura longit. totius 3 adequans; labrum 
tenue, ad suturam aliquanto profunde sinuatum ; columella sinu- 
osa; canalis brevis. 
Long. 14 mill., diam. 5. 
Hab. ? 
The spiral lirations are very numerous and beautifully 
minutely beaded. 
-Pleurotoma (Daphnella) supercostata. 
Testa ovato-fusiformis, tenuiuscula, luteo-albida, haud nitens; an- 
fract. 63, convexi, quorum ultimi 4 prope suturam leviter concayo- 
depressi, primus 13 levis, sequentes 3 plicis longitudinalibus 
(circiter 10) et striis numerosis transversis cincti, ceteri lineis 
spiralibus confertissimis et longitudinalibus innumeris minute 
reticulati ; anfr. ultimus magnus, ventricosus, basim versus con- 
tractus, cum columella caudam brevem effingens ; apertura pau- 
lulum spira longior ; columella fere recta; canalis brevis, paulu- 
lum recuryus; labrum ad suturam distincte sinuatum, extra 
incrassatum. 
Long. 13 mill., diam. 54. Apertura long. 7, diam. 23. 
Hab. Japan (A. Adams). 
The convex whorls slightly excavated near the suture, the 
upper ones only being longitudinally ribbed, and the minute 
