204 LArUS, LEPTOCEPHALUS. 



Sec. B. Nostrils covered with a cere, 

 parasiticus, (arctic gull,) two middle tail-feathers 



very long 



crepidatus, (black-toed gull,) varied with dirty- 

 white and brown, pale beneath ; two middle 

 tail-feathers a little longer. 16 inches long. 

 cataracteS) (skua-gull,) greyish ; quill and tail- 

 feathers white at the base ; tail sub-equal. 

 See M8. P. 



12. LEMUR. Spec. 13. 



volans, (flying cat,) tailed ; surrounded by a mem- 

 brane formed for flying. 

 See MS. P 



92. LEPAS. Spec. 32. 



intertexta, (acorn -shell,) subdepressed ; valves 

 imbricate and obliquely striate. Adhering to 

 oysters, &c. 



titinnabulum, shell conic, obtuse, bellform, rug- 

 ged ; fixed to bottoms of ships, &c. purplish 

 and bluish. 



anatifera, (duck barnacle,) shell compressed, five- 

 valved, smooth, seated on a peduncle. In clus- 

 ters on ships' bottoms, &c. Bluish-white. 

 See MS. P. 



8 2. LEPISMA. Spec. 7. 



saccharine, (sugar lepisma,) scaly, silvery, lead- 

 colour, with a tripple tail. Runs swiftly. Of- 

 ten found in sugar. 



See MS. P. 



4 1. LEPTOCEPHALUS. Spec. 1. 

 morrisini, (morris,) body almost transparent ; dor- 

 sal fins low and thin, extending the whole 

 length of the back. 4 inches long. 



Set MS. P. 



