PHYLLOBRANCHIA. TURBONIDZ. 185 
my kind and worthy friend the Rev. Dr. Goodall, Provost of 
Eton, and at a place named the Bridge of Rocks between Mount 
Edgecombe and Saint Nicholas’ Island, by myself. It varies 
very much in colour. 
STIRPS III. 
Genus 82. TursBo. 
Turbo Auctorum. 
Testa moderatim elevata. Apertura suborbicularis anticé, 
et ad sinistram semicircularis, posticé acuminata. Peritrema 
ad sinistram crassum antict, ad dextram tenue. Operculum 
corneum. 
Animal, Ore cylindrico, brevi. Tentaculis elongatis, acu- 
minatis, apice obtusiusculis, ad basin externé dilatatis, oculi- 
geris. Oculis sessilibus, rotundis. Pede testa breviori, anticé 
et posticé obtuso. 
The shell moderately elevated; the aperture suborbicular 
before, and at the left semicircular, acuminated behind ; the 
peritreme on the left thick, on the right thin; the operculum 
horny. 
The mouth of the animal is short and cylindric ; the tenta- 
cles elongated, acumiuated, rather obtuse at their extremities, 
dilated externally at their base, bearmg the eyes, which are 
sessile and round. The foot is shorter than the shell, and ob- 
tuse before and behind. 
Synopsis Specierum. 
1. littoralis. Testa crassé, subovali; anfractibus sex (primo 
magno), spiralitér striatis ; epidermide fusca aut brunneo- 
castanea. 
2. sulcatus. Testa crassa, sutura profunda; anfractibus quin- 
que, impresso-sulcatis ; epidermide flava, viridescente aut 
sordidé viridescente. 
3. rudis. Testa crassa, sutura profunda ; anfractibus quingue, 
