OF SOUTH DEVON. 289 



furnished us with two specimens from the estuary of Salcombe. It is 

 about 6 inches long. 



G. squamifera. Discovered by Montagu in South Devon, where it is not 

 uncommon. We have four specimens, they are about 5 inches long. 

 It is common in Cornwall, (Couch). 



G. rugosa, or Bamfia. Very rare : Mr. Prideaux has only seen three spe- 

 cimens, which were obtained by trawling in Plymouth Sound. 

 Porcellana, sub-genus. 



P. platycheles. Found in Devon under stones, at low tides ; Leach, Ed. 

 Ency. vii. 398. We have four specimens. They are common also in 

 Cornwall, says Mr. Couch. 



P. hexapus, (Pisidia, Leach). Found on the roots of fuci after storms. 

 We have one Devon specimen. 



P. Leachii, Gray. I am not aware if this was found in Devonshire, al- 

 though it is probable ; it is common in Cornwall, (Couch). 

 Megalopa, sub-genus. 



M. Montagui, (Cancer rhomboidalis, Mont.) Three lines long : found in 

 Devonshire, Leach, ' Mai. Brit.' 



M. armata, (Leach, 'Diet, des Sciences Nat.' tome xxviii). Found in 

 Bigbury Bay, Prideaux. 

 Gebia, sub-genus. 



G. stellata, (Cancer Astacus stellatus, Mont.) Obtained from Salcombe 

 estuary, in holes in the sand made by solens &c. It is very rare ; we 

 have one specimen from that locality. 



G. deltaiira. Found in similar situations as the last by Cranch and J. 

 Sowerby Jun. Leach, ' Linn. Trans.' vol. xi. 342. 

 Callianassa, sub-genus. 



C. subterranea, Found by Montagu in sand at Salcombe, " haud valde 

 infrequens," Leach, ' Linn. Trans.' xi. 343. We have two specimens 

 from Mr. Prideaux. 

 Axius, sub-genus. 



A. stirhynchus. Rare : specimens found at Sidmouth and Plymouth, 

 Leach, 'Linn. Trans.' xi. 343. Mr. Couch has seen it in Cornwall, 

 and thinks its rarity may only arise from its retired habits. 

 Astacus, sub-genus. 



A. marinus, the Lobster. Common. 



A.jluviatilis, (Lat), the river Crawfish. I am doubtful if this be com- 

 mon in our rivers, as, on trying to procure specimens we are sure to 

 have the Palinurus sent. We have, however, a good Devon specimen 

 in our Museum, from Mr. Prideaux. 



A. Norvegicus, (Nephrops, Leach). Rare : we have two excellent Devon 

 specimens in our Museum. 



Section 4. Carides, have the body arched and less solid 

 than in the preceding ; the front is always pointed, compress- 

 ed, and toothed on its edges ; antennae always advanced, la- 

 teral ones very long, the exterior jaw-feet, being very long, 

 resemble antennae ; one of the first pair of feet is often dou- 

 bled on itself; the segments of the tail are dilated laterally; 

 the exterior leaflet of the terminal fin always divided into two 

 by a suture, the middle piece elongated and spinous above ; 

 the false feet, five pairs in number, are long and foliaceous. 



Pen^us, sub-genus. 



P. trisulcatus (Leach, ' Mai. Brit.' 42) of our coast is a local variety of the 

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