220 PENTALEPAS. 



PEDUNCLE. See Pedicle. 



PEDUNCULATED. (Pedunculus, a little foot.) Attached to ex- 

 ternal objects by a hollow fleshy tube, called the Peduncle. 



PEDUNCULATED CIRRIPEDES. Lam. An order consisting 

 of molluscs which have multivalve shells, supported on a peduncle. 

 The genera which it contains are thus distinguished : 



1. Pentelasmis. Five valves. Fig. 34. 



2. Cineras. Five very minute valves distant from each other. 



Fig. 42. 



3. Otion. The same, but the animal has two auricles. Fig. 



43. The genus Palmina, Gray, has but one. 



4. Octolasmis. Shaped like Pentelasmis, but with 7 or 8 



valves. Fig. 41. 



5. Lithotrya. Five valves, peduncle scaly with a plate at 



the base. Fig. 39. 



6. Scalpellum. Shape square, valves 13, peduncle scaly. 



Fig. 35. 



7. Smilium. Same, but the peduncle hairy. Fig. 36. 



8. Ibla. Four valves, one pair long, one pair short, peduncle 



hairy. Fig. 40. 



9. Brismeus. Seven valves, even at the base. Fig. 38. 



10. Pollicipes. Principal valves in pairs, with many smaller 

 valves at the base. This genus has been divided into 

 Pollicipes, and Capitellum, the latter of which is founded 

 upon Pollicipes Mitellus, Auct. Fig. 37 and 37*. 

 PELAGUS. Montf. A genus composed of species of Ammonites, 

 which have the spire covered by the last whorl, as in Nautilus and 

 have an umbilicus. Orbulites. Bl. 

 PELLUCID. Transparent. 

 PELORUS. Montf. Polystomella, Bl. A genus of microscopic 



Foraminifera. 

 PELORONTA. Oken. Nerita Peloronta, Auct. Fig. 330. 

 PENEROPLIS. Montf. A genus of microscopic Foraminifera. 

 PENICILLUS. Brug. Aspergillum, Auct. 

 PENTALEPAS. Bl. Pentelasmis, Auct. 



