PINNOTHERES VETERUM. 
Dan XV. Bic: |, 2. Ss 4. et: 5. 
P. Fronte subemarginata; manibus infra arcuato sinuatis. 
(Mas.) Testa transverso-subquadrata, subsolida, punctata ; manibus ovatis digitis arcuatis ; 
abdomine lateribus integris segmento ultimo precedente abrupte latiore apice acuminato- 
rotundato. 
(Fem.) ‘Testa subtransverso-subquadrata, molliuscula, punctulatissima; manibus elongato- 
ovatis digitis subarcuatis ; abdomine latissimo noduloso-carinato, segmentis 5, 6, et 7 postice 
emarginatis ultimo precedente angustiore. 
Cancer pinnotheres. Linn. Syst. Nat. XII. 1. 1040. 9. 
Oliv. Encycl. Method. Crabe. 23. 
Pinnotheres veterum. Bosc Hist. Nat. des Crustacés. 1. 248. 
Pinnotheres pinne. Leach Edin. Encycl.'7. 431. 
Fig. 1, Fem. mag. nat. 2, ejusdem abdomen. 3, Mas. mag. nat. 4, sex idem amplificatus. 
5, maris abdomen amplif. 
Habitat intra Pinnas, Ostreas rarius. 
Mus. Montagu, Mas. et Fem. Francillon, Leach, Prideaux, Fem. 
Montagu first observed this interesting species in Britain; he found both sexes in Pinne 
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 MONTAGUI. 
Fic. 6, 7, et 8. 
P. (Mas.) Testa transverso-subquadrata, subsolida, punctata, fronte emarginata; manibus 
ovatis; digitis arcuatis; abdomine lateribus late emarginatis, segmento ultimo precedente 
subabrupte latiore apice obtuse rotundato, integro. 
* Hist, Nat. Lib. 9. cap, 42. 
