210 Dr. Leach on Cirripedes. 



* Basis cyathiformis aut infundibuliformis. 



^immersa,valvaB indivisae.4 Savignium. 



V immersa,valvaB bipartitae, 



indivisa: basis^ angulares 5 Pyrgoma. 



J immersa, valvae Balani . 6 Megatreroa. 



Tesfa J ^exserta, valvae Balani ..7 Adna. 



4-partita, valvae Balani 8 Creusia. 



/• spinosae,versus apertu- 



, ., , 7 ram hiantes 9 Acasta. 



sexpartita, valvae < , . '^^^a^^.a 



isimphces, ad apertu- 



^ ram attingentes . . 10 Messula. 



** Basis polymorpha. 



^sexpartita 11 Balanus. 



Testa < J. ... Ccellulosa 12 Conia. 



jquadnpartita < 



/ f solida 13 Elminius. 



Familia 3. Clisiad^. 

 Operculum testaceura, univalve, antice elevans. 

 Testa quadripartita, solida; operculum bipartitum. 14 Clisia. 



Genus OTION. 



Species 1. O. Bellianus. 

 O. squamis inferis arcuatis, infra angustioribus : postica infra 

 acuminata ; appendicibus auriformibus mediocribuSj purpu- 

 rascente maculatis ; corpore super pedunculum utrinque 

 vittis tribus purpurascentibus, exteriore obliqua, posterioribus 

 rectis. 

 • Hab. in Mare Hispanico ad Barcelonae littora. 

 Mus. nost. iu Mus. Brit, communicavit mihi amicus carissimus 

 Thomas Bell, Arm. 

 Description. — The lower valves of this Otioa are arched and narrow 

 at the lower part ; the posterior valve acuminated, auriform 

 appendages of moderate size, spotted with purplish, the body 

 above the peduncle with three purplish stripes on each side, 

 the outer of which is oblique and the posterior ones straight. 



