36i^ APPENDIX. 



wliite, with blueish spots on the basis; the tentacula 

 dark blue ; the seizers a very little greenish, almost 

 transparent. The disk of the body measured, in 

 diameter, one inch, the seizers nearly two. 



I must here repeat w^iat I said respecting the 

 difference of the species of the velella^ Porpita 

 nuda. Lam. Hist. Nat. des Anim. s. Vertebr. tom. ii. 

 p. 484-. n. 1. is probably an individual with its seizers 

 torn off, such as we also have frequently caught, 

 because their seizers easily remain hanging in the 

 net, and tear off. — Porpita appendiculatdy Lam. 1. 

 c. n. 2. is a common Porpita^ mutilated by small 

 crabs, of the exterior skin of the edge of which 

 only three fragments remained ; we likewise met 

 with such. 



Porpita glandifera^ Lam. 1. c. n. 3. gives the de- 

 scription of an uninjured individual; also the Porpi- 

 ta gigantea. Lam. 1. c. n. 4. which (if it is really so) 

 can be distinguished from the preceding by the 

 blue colour of the seizers. 



In conclusion, I will observe, that the Physalia 

 are furnished, besides the suckers, only with arms 

 for seizing their prey ; the Velella only with ten- 

 tacula, but the Porpita with both. 



