GLOSSAET. 



487 



PANOPJEA, all aperture ; a genus of 



shells. 

 PARMACELLA, lat., parma, a little 



shield ; a genus of gasteropoda. 

 PARMOPHORUS, shield-bearing. 

 PATELLA, a bason, the knee-pan; 



a genus of shells. 



PECTEN, a comb ; a genus of shells. 

 PECTINARIA, from pecten, a comb. 

 PECTINATED, toothed like a comb. 

 PECTUNCULUS, a genus of shells. 

 PEDIFORM, shaped like a foot. 

 PEDUM, a shepherd's crook. 

 PEDUNCLE, a stalk or support. 



PEPERINO, a volcanic conglomerate. 

 PERNA, a gammon of bacon, a pig's 



foot ; a genus of shells. 

 PETRICOLA, inhabiting rocks. 

 PETROLEUM, mineral oil. 

 PHASIANELLA, a little pheasant; a 



genus of shells. 

 PHOLAS, a burrow, to pierce; a genus 



of shells. 



PHYLLIDIA, a genus of gasteropoda. 

 PIIYLLIROE. do., do. 



PHYSA, a genus of shells. 

 PILEOPSIS, like a bonnet ; a genus of 



shells. 

 PINNA, a plume, or feather ; a genus 



of shells. 

 PINNATE, shaped like a feather, or 



fin. 

 PIRENA, the point of a sword ; a ge- 



nus of shells. 

 PISOLITIC, pea-like; resembling peas, 



agglutinated together. 

 PLACENTULA, a little cake. 

 PLACUNA, a broad table ; a genus of 



shells. 

 PLAGIOSTOMA, an oblique mouth ; a 



genus of shells. 

 PLANAXIS, flattened axis? 

 PLANORBIS, flat orb; a genus of 



shells. 



PLANORBIS, a freshwater shell, of 

 discoidal form. 



PLESIOSAURUS, an extinct fossil genus 

 of saurian or reptiles, approxi- 

 mating more closely to the lizard 

 than the fish, as the ichthyo- 

 saurus approaches more nearly 

 to ihe fish than the lizard. 



PLEUROBRANCHUS, branchiae at the 

 side ; a genus of shells. 



PLEUROTOM A, having the edge cleft; 

 a genus of shells. 



PLEXUS, a bundle of vessels. 



PLICATULA, lat., plica, a little fold, 

 or wrinkle ; a genus of shells. 



PLIOCENE, the newer groups of the 

 tertiary formations. 



PLUMOSE, feather-like. 



PNEUMODERMON, skin-like lungs; a 

 genus of pteropoda. 



PODOPSIS, like a foot. 



POLLIOIPES, lat., pollex, the thumb, 

 and pes, the foot; a genus of 

 cirrhipoda. 



POLYGYRA, many whorls. 



POLYPARIA, corals. 



POLYSTOMELLA, many-mouthed, 



PORPHYRY, an igneous rock. 



POZZUOLANA, volcanic ashes. 



PRECIPITATE, the chemical deposit 

 of a substance held in solution 

 by water. 



PRODUCTA, an extinct bivalve shell, 

 found in the lower secondary 

 rocks. 



PSAMMOBIA, living in sand ; a genus 

 of shells. 



PTEROCERA, horned wing ; a genus 

 of shells. 



PTERODACTYLS, an extinct winged 

 reptile. 



PTEROTRACHEA, winged trachea. 



PTYCHODUS, wrinkle-tooth fish. 



PUMICE, light, spongy, porous lava. 



PUPA, a puppet. 



PURPURA, a shell producing purple. 



