CRAGNON FASCIATUS. 
Tas. XXXVII. ec. Fic. 1. 
C. pedum secundo pari filiforme, quam primum et tertium breviore minuté didactyle, abdomine ad 
articulum quartum subité contracto, fusco latifasciato. Spina sterni obsoleta. 
Cragnon fasciatus, /isso, Crust. de Nice, t. III. f. 5, p. 82. 
The colour of this shrimp resembles that of the common species, excepting in the dark 
markings on the second and third and a brown band across the fourth segment of the abdomen. The 
fourth segment contracts rather suddenly, and the fifth and sixth are comparatively short and 
narrow. ‘The sternal spine, sharp and strong in the common shrimp, is almost obsolete in this 
species. The first specimens found on our coast were taken in Salcombe Bay in Devonshire. 
ALPHEUS. 
ASTACUS, Fabricius. 
ALPHEUS, Fabricius, Leach, Latreille. 
Antenne externe subtus et extus internas locate, palpo lamellari angusto et acuminato. 
Antenne interne setis duabus terminantibus seta superiori quam inferior crassiuscula, articulo 
basali brevi, squama spinifermi munito. 
Pedipalpi externi angusti, elongati. 
Pedum par primum magnum inequale didactyle; par secundum filiforme, didactyle, tenuissimo, 
carpo multiarticulato ; paria altera attenuata, monodactyla. 
Testa antice super oculos arcuatim producta. 
Abdomen elongatum. 
EXTERNAL ANTENN#& placed underneath and outside internal; laminar flap narrow and 
acuminated. Internal antenne ending in two sete; upper seta rather thicker than under, basal 
joint short, provided with a spiniform scale. External pedipalps narrow, elongated. First pair of 
feet large, unequal, didactyle; second pair filiform, very thin, didactyle, with multiarcutate wrist. 
Carapace produced in an arch over the eyes. Abdomen elongated. 
C 
