268 REV. E. BOOG WATSON ON THE 



curves equably to the point of the shell, which is obliquely cut off 

 upwards, forming a broad open canal. Inner lip spreads a little 

 on the body in a porcellanous glaze, narrowing to a sharp point 

 in front ; its direction is almost straight in an oblique direction 

 to the extreme point, being only slightly concave in the middle. 

 H.l-6. B.0-9. Penultimate whorl, height 0-14. Mouth, height 

 1-37, breadth G"32. 



In form and colour this is very like 0. cancellata, Sow. ; but in 

 sculpture it is different, having the longitudinals much more nu- 

 merous and the spirals much less sharp, especially less projecting 

 at their intersection with the longitudinals ; the spire is much 

 lower, the edge of the last whorl projects much less sharply, and 

 the spiral at the shoulder does not project nearly so much as the 

 first spiral below this point. In the upper whorls there is not 

 the sharp reticulation as in O. cancellata, from the intersection 

 of the spirals by the sharp longitudinals. In that species, too, 

 the embryonic apex is quite different, being a coarse flattened 

 blob, much larger, and having at the outside only If whorls. 



O. grandis, A. Ad., is much rougher, the spirals are more nume- 

 rous and higher, the spikes on the spire are not so strong, nor do 

 they run parallel to the axis, and the apex has fewer whorls. 

 O. Denisoni, Eve., has all the spirals mucronated at their inter- 

 section with the longitudinals. 



Teiton, Lam. 



TEITON PHILOMELA, U. Sp. 



St. 135 c. Oct. 17, 1873. Lat. 37° 25' 30" S., long. 

 12° 28' 30" vV. Nightingale Island, Tristao da Cunha. 100- 

 150 fms. Eock, shells. 



Shell. — A rather high narrow cone, with a contracted base and 

 long reverted canal, two varices on the last whorl, and a thin 

 bristly epidermis. Sculpture. Longitudinals — there are about 

 18 straightish ribs on the last whorl, these are fewer in number 

 on the earlier whorls ; they are rounded, a little prominent, and 

 about half the width of the shallow depressions which part them ; 

 relatively to these the varices (of which there is one on each two 

 thirds of a whorl) are high and prominent, though narrow ; 

 the whole surface, ribs and interstices, is rather coarsely striated 

 with finish rounded threads on the lines of growth. Spirals — 

 the last whorl is encircled by 6 or 7 rounded spiral threads, which 

 on the longitudinals form blunt rounded tubercles, pretty equally 



