99 
*he last whorl the powder cost stop short at the periphery. 
Pullus of smooth w 
This exis is doni] related to R. trajectus, Watson, but 
«differs by mo elongat e shape, arched ribs, and rounded whorls ; 
also to R. Strangei, Braz., which has closer and stronger ribs, fewer 
‘Spiral stris, iu the shell short and stout 
Tasmania. 
Rissoia (Apicularia) apieilirata, spec. nov. 
Elongate-conie, thin, yellow-fawn, smooth, shining. Pullus 
'hyaline, turbinate, two-whorled, ornamented with three, spiral, 
:simple, relatively broad and hig h keels. Whorls three, slightly 
bicarinated, the posterior slope somewhat concave, the anterior 
slope steeper and shorter; ornamented by transverse slender 
ridges (about twenty on the penultimate), which are oblique 
on the posterior slope, vertical thence to the front suture; 
there is à spiral gia. at the posterior suture, and a threadlet 
near the anterior ; two spiral rows of small nodosities 
-occupy the near uL third of the whorl. 
Periphery of last whorl with four riblets crossed by costul:e, 
‚and there are a few others on the base which gradually decrease 
Aperture, oval; peristome PER thin. 
Length, 2:2; width, 9 mm. 
D'Entrecasteaax Channel, Tasmania 
This species is unique in the section by reason of its ornate 
pullus 
Rissoia (Pusillina) diserepans, spec. nov. 
Shell oval-conie, erus A p bar, pale ee " soin apex 
f t 
anterior part; an indistinct lineation is at the periphery, as also 
‘one above and one below, all in near contiguity; base finely 
wah econ radially. 
Aperture oval, r and inner lips thinly callously joined ; 
‚outer fip. € (lightly asics dilated behind, front lip wi 
slight insinuosity—these features are probably the result of an 
injury ring life). Columella slightly exsert, margining a linear 
‘umbilical chink. 
ngth, 3; width, 1:6 mm. 
D’Entrecasteaux Channel, Tasman 
e ornament and shape, in coii bli tid with the DEPT 
'base, distinguish this species from all figured species. 
