182 PHYLLOBRANCHIA. TURBONID. 
Habitat in fluvius Europe, vulgatissimé. Alt. 2 une. 
Animal pallidé cinerascens. Tentacula supra violasceutia. 
Caput superné nigricans. Corpus punctis nonnullis violascente 
nigris confluentibus irroratum. 
Shell smooth, yellow, spotted and variegated with lemon, 
purple, black and violet. Peritreme white. Height three- 
eighths of an inch. 
Animal pale ash-coloured. Tentacles violet on each side 
above. Head blackish above. Body sprinkled with some vio- 
let and black confluent spots. 
Inhabits the rivers of Europe, and is very common. 
This is a genus containing a vast number of species, only one 
of which, as far as I have been enabled to learn from the exa- 
mination of conchological works, inhabits Europe ; and as all 
the species inhabit rivers, I have altered the name to Luropea. 
Genus 81. TEMINA. 
Nerita ductorum. 
Testa spira depressa. Anfractus basilaris maximus. <Aper- 
tura rotundata. Peritrema posticé crassum, triangulatim ex- 
cavatum, ad dextram et sinistram gradatim angustatum. 
Shell with its spire depressed. The basal whorl the largest. 
Aperture rounded. Peritreme thick behind, triangularly ex- 
cavated ; the right and left sides become gradually narrowed. 
Synopsis Specierum. 
1. pallidula. Testa transversim ovali, tenui, semipellucida, 
spiraliter et obsoleté striata; anfractibus quatuor; epider- 
mide pallidé fusco vel viridescente. 
2. Turtoniana. Testa oblongo-ovali, tenui, semipellucida, 
transversim striata, epidermide purpurea. 
3. rufa. Testa subglobulari, tenui, semipellucida, glabra; 
anfractibus quatuor, primo maximo, tumido. 
4. variabilis. Testa tenui, semipellucida, glaberrima; an- 
fractibus quinque, colore variantibus. 
