PORTUNUS LONGIPES. 
Tab. IX. a. Fig. 1. 
P. testa transverse subquadrata, margine antico-laterali quam posticum breviori, fronte quadrilo- 
bata ; dentibus marginalibus acutis ; postico elevato, acutissirae producto ; pedibus angustis 
elongatis. 
Portunus longipes. Eisso, Crust. Nice, t. 1, fig. 5. 
Fig\ 1. Portunus longipes, mas. mag. nat. 2. Pedipalpus. 3. Femime abdomen. 
This species is more slender in all its parts than any others of the genus. The front of the 
carapace is wide and short, with five teeth on each side, the last of which is much produced. Like 
many other Crustacea long known as Mediterranean, this Portunus has been tardily discovered as 
an inhabitant of our shores. 
THIA. 
THIA, Leach. 
CANCER, Linnaeus. 
Antenna extern® subtus occuli pedunculum instruct®. 
Pedipalpi versus foveam antennarum extensi, articulo superiori magis lato quam longo. 
Oculi rninuti, pedunculis brevissimis. 
Testa cordata, postich angustata, lateraliter arcuata. 
Pedum par anticum breve, unguibus deflexis. 
Abdomen utroque sexu angusto. 
External antenn® placed beneath the peduncle of the eye. Pedipalps extended towards the 
antennal pit, with upper joint broader than long. Eyes very minute, with short peduncles. 
Carapace heart-shaped, narrow posteriorly, arched from side to side. Anterior pair of feet short, 
with the fingers bent downwards. Abdomen narrow in both sexes. 
THIA POLITA. 
Fig. 4 — 6. 
T. testa polita, valde arcuata, margine obsoletissime dentato, ad oculum unisulcato, posticb 
angustissimo, ad terminum truncato, omnino ciliato, orbitis minutissimis, oculis ferb obtectis. 
A 
