PLATE XXX. 
Fig. 1. PINNA iNGENs. 
Pinna ingens, Mont. Test. Brit. p. 180. — Brown in Ency. Brit. vi. p. 424. — Lam. Syst. vi. p. 154. 
Fig. 2. PINNA ELEGANS. 
Pinna elegans. Leach's MSS. — A New Species found on the Devonshire Coast by Mr Prideaux. In the British 
Museum, and Lady Jardine's Cabinet. 
Fig. 3. PINNA PECTINATA. 
Pinna pectinata, Mont. Test. Brit. p. 178. — Lam. Syst. p. 133. — Brown in Ency. Brit. vi. p. 424. 
The animals inhabiting the Pinnae have the power of aHixing themselves at pleasure to any substance, by throwing 
out an extensile member, and discharging from its tip a drop of gluten, which, by the retraction of the same or- 
gan, is formed into a silky filament ; and by frequently repeating this operation a thick tuft is produced ; from this 
a species of silk cloth is manufactured at Palermo and Naples, which is made into dresses, and brings a very high 
price. Stockings and gloves are also manufactured from this substance. This shell was much celebrated amongst 
the ancients on account of the cloth which was made from its byssus. 
In the Mediterranean a small species of crab often takes up its abode M'ithin the shells of the Pinnae, and is said 
to act as a monitor on the approach of danger. Some have attributed this to a kind of hospitality, in the animal 
giving protection to this intruder, who, it is likely, is an unwelcome guest to the proper inhabitant. 
