OF NORTHUMRERLAND AND DURHAM. 147 
Mr. Bean has distinguished it in his cabinet under the MS. name 
of O. costata. 
9. O. opLiqua, Alder. 
Odostomia? obliqua, Ald. in Ann. Nat. Hist. xiii. 327, t. 8, 
st, IY 
In shell-sand, Tynemouth, rare.—J. A. 
[In the preceding family, to which we have not ventured to give 
a name, we have brought together, provisionally, those genera 
formerly considered to belong to the Turbinidew, whose ani- 
mals have a retractile proboscis. In the four following fami- 
lies, the animals have the head more or less proboscidiform, 
but there is no real proboscis. | 
Famity. Lirrorinipa, Gray. 
49. RISSOA, Fréminville. 
1. R. costata, Adams. 
Turbo costatus, Mont. Test. Brit. 311, t. 10, f. 6. 
Rissoa exigua, Mich. Desc. du Rissoa, 18, f. 29, 30. 
In shell-sand, frequent. It has not been found alive here, but, 
like most of the small species found in sand, it probably inhabits 
the Laminarian zone beyond low-water mark. 
2. R. striata, Adams. 
Turbo striatus, Mont. Test. Brit. 312. 
Rissoa minutissima, Mich. Desc. du Rissoa, 20, t. 27, 28. 
In pools among the rocks, frequent. This is one of the com- 
monest of the shells thrown up in sand. 
Pyramis candidus and P. discors of Brown are apparently only 
varieties of this very common and widely diffused species. 
3. R. parva, Da Costa. 
Turbo parvus, Mont. Test. Brit. 310. 
In shell-sand, common ; and alive beyond low-water mark. 
This species is found alive, though sparingly, on small sea-weeds 
among the rocks left bare by the tide. Its principal locality 
appears to be beyond low-water mark, and a small variety, with 
a thinner and more glossy shell, is not uncommon on corallines, 
from about twenty fathoms water. 
