PINNOTHERES PISUM. 
Tas. XIV. Fic. 1, 2, and. 3. 
Y. (Fem.) Testa orbiculato-subquadrata, molliuscula, glaberrima, fronte subarcuato, integrot 
manibus oblongis subtus femoribusque supra linea ciliata; pollice subarcuato; abdomine 
Jatissimo segmentorum lateribus arcuatis, articulo quinto latiore, ultimo precedente 
angustiore, apice tenué et obseuré at laté emarginato. 
Cancer Pisum. Jinn. Syst. Nat. ed. XII. 10392 Penn. Brit. Zool. IV.1. T.1.f.1.  Fabr. 
Suppl. Ent. Syst. 343. 
Pinnotheres Pisum, Jatr. Gen. Crust. et Ins. T.1. p.35. Bosc Hist. Nat. des Crust. 1. 243. 
. Habitat inter Modiolorum, Mytilorum testas frequentissime. 
Fig. 1, mag. nat. 2, ead. sp. aucia. 3, Femine abdomen auctum. * Pedipalpus geminus 
externus auctus. 
It is not without doubt that I have quoted this species (which is very often found in the 
shells of Modioli and Mytili) as Cancer Pisum of Linneus, as he has described it to be of the 
size of a pea, (“‘magnitudine pisi’”), without making any mention of its habitat. 
The shell of the female is orbiculate-quadrate, soft, very smooth, with the front slightly 
arcuate and entire; hands oblong, with a ciliated line beneath; thighs with a ciliated line above; 
thumb slightly bent; abdomen very broad, with the sides of the segments arcuate, the fifth seg- 
ment broader, the last narrower than the sixth, obscurely but broadly emarginate. Male unknown. 
PINNOTHERES CRANCHII. 
Fic. 4 and 5D. 
P. (Fem.) Testa orbiculato-subquadrata, molliuscula, glaberrima, lateribus postice dilatatis ; 
fronte recto, obscure subemarginato; manibus oblongis subtus femoribusque supra linea 
ciliata; pollice subarcuato; abdomine latissimo segmentis lateraliter subarcuatis secundo 
sequentibusque postice distincte emarginatis, segmento quinto sublatiore; ultimo prace- 
dente angustiore. 
Habitat in Modiolis, Mytilis rarius. 
Fig. 4, Fem. mag. nat. 5, Femine abdomen mag. nat. 
This new species was discovered by Mr. J. Cranch (a most assiduous Collector of marme 
productions) in the Kingsbridge estuary, where it is occasionally found in Modioli and Mytili. 
It is easily distinguished from P. Pisum by the form of the front, which is straight and slightly 
emarginate, by the breadth of the hinder part of the sides of the shell, and by the abdomen, all the 
joints of which, excepting the first, are distinctly notched behind. Male unknown. 
