PAGURUS. 
PAGURUS. Fair., Bose, Lam., Lair., Leach. 
ASTACUS. Pennant. 
CANCER. Linne. 
Antenna, ««we. brevores, «*, duabu. articulati.; inferior,, breviore, filiform! • superior* 
compress* sub cornea mfra pilo.fi, pcduoculu, triarticulatus, articulo tertio lougiore 
seeu„‘doI'H m - SCta “ 8! ‘""fT mU,tiarticuIa ‘*; Pedunculu. 4-articu]atus, articulo 
secundo ad apicem supra spina mobili instructo 
Pedirgn ■ geminl enernl cauli interne artieulis quinque exserti. ; articuli. 1 et 3 brevioribus, 
4 et 4 longionbus longitudme submqualibus. 
Oculi frontales, spina mobili supra ad illorum basin 
maj " 8 ' dida ^ ,Um -' fasciculato-piiosis; 
^ brevia ^^:*^' 18 ^ S "“ 8 *«* 6 
Thorax membranaceus antice supra clypeo crustaceo instructus. 
Abdomen membranaceum exarticulatum, elongatum, molle. 
Crnda triarticulata, Crustacea, articulo secundo utrinque appendiculato 
Interior antenna shortest, with two articulated sets; the lower seta shorts filV 
upper one compressed, subconic hairy beneath; peduncle three-jointed, the thirdW^- 
a »«■««. setaceous, very long, composed of many joints - peduncle djointed the second 
ZeLZ fo a ,7irt ’ P T “ ' hC “ PPer Par ‘ ° f i<5 extremU r Batenml feezes with their 
al footstalk having five exserted joints, the first and third joints shortest the second and 
upper 1 paTtTf thdr b ^ ^ " the fr ° nt ' witha — eable spine at the 
the fingers with tufts of 1 ^ very unequal, larger than the rest, didactyle, 
elongate claws - fourth -. irl "fifl a »d third pairs of equal size, elongate, with subcurved 
g aws fourth and fifth pairs short, subcrustaceous, hairy, didactyle. Thorax mem- 
branaceous, with a crustaceous shield on its anterior part above. Abdomen without j ten ft 
on efr;.r ' 8 M WtiCUkted ' —d joint »ith appendtees' 
The animals of this genus are commonly denominated Soldier, or Hermit-crabs Their 
economy is extremely curious and interesting, and so much so as to have attracted the attention 
of ancient naturalists ; one species is described by Aristotle under the title 
• "l t lC Spe ^ ,eS are parasitic ’ and inhabit the cavities of turbinated shells. They change 
their habitation during their growth, first occupying the smallest shells, and latterly those of 
considerable dimensions. They adhere to the pillars of the shells by the appendices shuated o„ 
either side of their tail : and move about with great facility, dragging the shells after them. 
