Class VI. APLYSIA. 79 



Bohaclsch has given us the colors as above, 

 and in tab. iv. f. 21", 22. figures of the lungs, 

 which resemble in some measure a lady's fan. 



A- unicolor, mustelina; mibus phoeniceis. H. Da- o. Muste- 



pulmonibus spicifor- vies. Mss. lina. 



Tawny. 



* This species is of a deep tawny, or yellowish 

 brown color, except the shield, which is a dull 

 brown, and the part, which by its situation 

 corresponds with what Bohaclsch deems the 

 lungs in his subject, which is crimson. Not- 

 withstanding these parts differ so much in color 

 and form, as represented in the figures given 

 by Bohaclsch and Mr. Knapp, they are surely 

 designed for the same use. 



Mr. Knapp observes, " this part apparently 

 " performs the office of spiracles, being in a 

 " constant state of contraction and expansion ; 

 " this fabrication, when the animal is at rest, 

 " is concealed by one of the lobes E* and the 

 " shield." 



The figure is the production of the accurate 

 pencil of j. L. Knapp, Esq. who found the 

 subject in deep water near Tenby, Pembroke- 

 shire. Tab. xxii. 



