PINNOTHERES VETERUM. 
Tad. XV. Fig. 1, 2 , 3 , 4 , et 5. 
P. Fronte subemarginata ; manibus infra arcuato sinuatis. 
(Mas.) Testa transverso-subquadrata, subsolid a, punctata; manibus ovatis digitis arcuatis ; 
abdoniine lateribus integris segmento ultimo praecedentc abrupte latiore apice acuminato- 
rotundato. 
(Fern.) Testa subt rails verso-subquad rata, molliuscula, punctulafissima ; manibus elongato- 
ovatis digitis subarcuatis ; abdomine latissimo noduloso-carinato, segmentis 5, 6, et 7 postice 
emarginatis ultimo prsecedente angustiore. 
Cancer pinnotheres. Linn. Syst. Nat. XII. 1. 1040. 9. 
Oliv. Encycl. Method. Crabe. 23. 
Pinnotheres veterum. Bose Hist. Nat. des Crustaces. 1. 243. 
Pinnotheres pinnae. Leach Eclin. Encycl. 7. 431. 
Fig. 1, Fern. mag. nat. 2, ejusdem abdomen. 3, Mas. mag. nat. 4, sex idem amplificatus. 
5, mar is abdomen amplif. 
Habitat intra Pinnas, Ostreas rarius. 
Mus. Montagu, Mas. et Fern. Fran ci 11 on, Leach, Prideaux, Fern. 
Montagu first observed this interesting species in Britain; he found both sexes in Pinnae 
from the Salcombe estuary, where it has likewise been taken by Mr. J. Cranch. 
It occurs envelloped in the mantle of the Pinna, but it is not confined to that genus of 
animals, having been once noticed in Ostrea edulis (the common oyster) by my assiduous friend 
Mr. C. Prideaux. This is most probably the species alluded to by Cicero and Pliny*, and may 
be the same with the species given in vol. 2. tab. 34, of the splendid work of Poli on the shells of 
the Sicilies; but the figure is not sufficiently correct to enable me to refer to it with any degree 
of certainty. 
PINNOTHERES MONTAGUE 
Fig. 6, 7, et 8. 
P. (Mas.) Testa transverso-subquadrata, subsolida, punctata, fronte emarginata; manibus 
ovatis; digitis arcuatis; abdomine lateribus late emarginatis, segmento ultimo praecedentc 
subabrupte latiore apice obtuse rotundato, integro. 
* Hift. Naf. Lib. 9. cap. 42. 
