15 
Zoological Miscella riy . 
Green Porcellana. Porcellana viridis. Pisidia viridis^ Leach MSS. 
Green, with closish, cross wrinkles, edged with short, rigid hairs ; 
legs fringed with hairs ; carpus and claws rather convex, slender, the 
front of the carpus with four low, triangular, serrated teeth, and with a 
series of spines on the outer hinder edge ; forehead rounded, with a cen- 
tral longitudinal groove. 
Lamarck Porcellana. Porcellana Lamarckii. Pisidia Lamarckii, 
Leach MSS. Pale brown ; thorax nearly smooth ; legs and claws rugose, 
subquamose, subciliated ; forehead triangular, bent down, with a central 
groove, and a slight nick before each eye ; carpus short, convex, with a 
central tubercular ridge, front edged with three triangular teeth, those 
near the base largest, the hinder edge with two or three obscure teeth 
near the tip ; one specimen only. 
.Asiatic Porcellana. Porcellana Asiaticus. Pisidia Asiaticus, Leach 
MSS. Red brown, pale ; thorax and limbs with obscure ciliated scales, with 
an incurved spine behind each eye ; forehead slightly produced, triangu- 
lar, side edges concave, with a centre longitudinal groove ; carpus ra- 
ther long, convex, equal, with three long distant serrated teeth, those near 
the base largest (very like former, but with the spine on the side of the 
thorax ) 
Sajfs Porcellaria. Porcellana Sayii. Pisidia Say ana, Leach MSS. 
Pale brown, punctulate, smooth ; limbs fringed with hair ; forehead 
three-lobed, the central lobe triangular, acute, margin denticulated ; 
thorax roundish ; carpus short, triangular, with a broad angular lobe 
near the base in front ; nearly allied to P. Platychelas, but the carpus 
shorter, and the lobes larger. 
Flat-clawed Porcellana. Porcellana platycheJes. Cancer, Linn. 
Pale brown ; hirsute smoothish ; forehead rather produced, three- 
lobed, central lobe longest, smooth edged, with a central furrow ; limbs 
fringed with hair ; carpus convex, rather longer than broad, with a sin- 
gle triangular projection at the base of the front edge. Inhab. English 
coast, common. 
Common Porcellana. Porcellana Leachii. Pisidia Linneana, 
Leach MSS. Cancer hexapus, Linn. Pale brown, smooth; forehead 
three-lobed, centre lobe broad, smooth edged, with a ceiitral groove ; 
limbs smooth, carpus convex, rather longer than broad, with a rather 
produced even 'edge in front, rounded and smooth behind (with some- 
times a slight nick near the inner edge, forming an obscure lobe). 
Inhab. English coast. 
Allied Porcellana. Porcellana affinis. Pale brown, smooth ; forehead 
scarcely produced, obscure, three-lobed, central lobe broad, smooth 
edged ; carpus convex, longer than broad, with a rather produced even 
edge, hinder side edged with an obscure elevated subsquamose ridge. 
Inhab. 
Tubercular Porcellana. Porcellana sociata,. Say, Jour. Acad. N. S. 
Phil. I. 456. Pisidia sociata, Leach MSS. Pale brown ; thorax sub- 
quadrangular, smoothish; limbs with large globular warts, pilose ; forehead 
