328 EET. E. BOOa WATSON ON a?HE 



surface is scored witli fine furrows, wbicli are remote above but 

 closer in front, where tbe intervening surface is rounded ; a 

 rounded keel lies below tbe suture. Colour translucent white. 

 Mouth markedly shorter than the shell, straigbtish, clavate to 

 pear-sbaped, narrow and channelled above. Whorls 4, ex- 

 clusive of 1| of the apex, which are sinistral. Outer lip. straight, 

 very slightly appressed above, where it is separated from tbe 

 body by tbe slight shallow sutural canal. Top : there is a short 

 distinct subscalar spire, in which the first regular whorl hardly 

 sbows, but which is crowned witb the small sinistral half-turned- 

 over apex. Inner lip : there is a thin but distinct labial pad ; the 

 curve of the body is nearly straight, but is convex in front ; the 

 pillar is very oblique, broad, flat and patulous, witb a very broad, 

 scarcely twisted tootb, which is longitudinally furrowed so as 

 almost to be double : in front of this tooth the pillar is truncated 

 at its junction with the outer lip. L. 0'13. B. 0'055. B. of 

 mouth at same place, 0'014. 



This species differs from IT. avenarius, Wats., in the shape of the 

 shell and of the spire, and in the apex and pillar. IT. canalicu- 

 latus, Say, is much stumpier and has a lower spire. The up- 

 turned apex is like that of Odostomia lactea, Linn. 



3. TJteictjlus (Toenatina) avenaeixjs*, n. sp. 



April 17, 1874. Port Jackson, Sydney. 2-10 fms. 



Shell. — Oval, rounded bluntly in front and sharply above, where 

 the papillary apex projects, smooth, angulated above round the 

 outside of the channelled suture, with a strongly toothed, twisted, 

 and oblique pillar and a smallish mouth, which is shorter than 

 the shell. Sculpture. Longitudinals — there are faint rounded 

 furrows on the lines of growth. Spirals — on tbe upper part of 

 all the whorls there seem to be close-set very faint spirals ; about 

 the middle of the whorl they become stronger, like very fine 

 remote furrows ; a bluntly angulated keel projects axially below 

 the suture. Colour translucent white. 3£outh a good deal 

 shorter than the shell, conically clavate, slightly curved, a little 

 blunt at the top. Whorls 4 to 4|, angulated above ; each rises 

 distinctly above the one which follows. Outer lip almost 

 appressed above, but separated by the deep sutural channel 

 which runs into the top of the mouth : in front it is very 



'^ So called from its liaTing somewhat the appearance of a grain of oats. 



