PINNOTHERES PISUM. 
Tab. XIV. Fig. 1, 2 , and 3. 
P. {Fern.) Testa orbiculato-subquadrata, molliuscula, glaberrima, fronte subarcuato, integro ; 
manibus oblongis subtns fcmoribusquc supra linea ciliata; pollice subarcuato; abdomine 
latissimo segmentorum lateribus arcuatis, articulo quinto latiore, ultimo prseccdentc 
* angustiore, apiee tenue et obscure at late emarginato 
Cancer Pisum. Linn. Syst. Nat. eel. XII. 1039? Perm. Brit. Zool. IF. 1, T. l.f. 1. Fair. 
Suppl. Ent. Syst. 343. 
Pinnotheres Pisum, Lair. Gen. Crust, et Ins. T. 1 . p. 35. Bose Hist. Nat. cles Crust. 1. 243. 
Habitat inter Modiolorum, Mytilorum testas frequentissime. 
Fig. 1, mag. nat. 2, ead. sp. aucta. 3, Femora? abdomen auctuin. * 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 Linna?us, as he has described it to be of the 
size of a pea, (“magnitudine pi si”), 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. 
Fig. 4 and 5. 
P. (Fan.) Testa orbiculato-subquadrata, molliuscula, glaberrima, lateribus postice dilatatfs; 
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 prajee- 
dente angustiore. 
Habitat in Modiolis, Mytilis rarius. 
Fig. 4, Fern. mag. nat. 5, Fern ip ;e abdomen mag. nat. 
This new species was discovered by Mr. J. Cranch (a most assiduous Collector of marine 
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. 
