(sect, a), balanus tintinnabulum. 195 



Lepas tintinnabulum. Chemnitz. Neues. Syst. Conch., 8 B. 



(1785), Tab. 97, tigs'. 828-831. 

 Balanus tulipa. Bruguiere. Encyclop. Metli., 1789; sed non 



B. ttdipa alba, in Chemnitz; necnon 



B. tulipa, 0. F. Midler, Zoolog. Dan. ; 



nee non B. tulipa, Poli, Test. nt. Sicilian. 

 — G. B. Sowerby. Genera of Recent and Fossil 



Shells, Tab. Genus Balanus. 

 Lepas crispata (var.) Schroter. Einleitung Conch, vol. iii, Tab. 9, 



fig. 21. 



— spinosa (var.) Gmelin. Linn. Syst. Nat. 



— TINTINNABULUM, SPINOSA, CRISPATA ET PORCATA. W. Wood. 



General Conchology, 1 815, PL 6, figs. 1, 2. 

 PL 7, figs. 4, 5. PL 8, figs. 1—5. 

 Balanus tintinnabulum. Chenu. Illust. Conch.* 



— d'Orbignii (var.) Chenu. Illust. Conch., Tab. G, fig. 10, 



sed non Tab. 4, fig. 13. 



— crass us (Poss.) Sowerby (!). Min. Conch., IS] 8. Tab. 



84. 



Shell varying from pink to blackish purple > often striped 

 and ribbed longitudinally : orifice generally entire, sometimes 

 toothed. Scutum with the articular ridge broad and reflexed. 

 Tergum with the basal margin generally forming a straight 

 line on opposite sides of the spur. 



Var. (1) communis (PL 1, figs. a, b,f supra : PI. 2, figs. \a, \c, Id, 

 \e, \i, \k): conical or tubulo- conical ; smooth or moderately ribbed longi- 

 tudinally ; colours varying from purplish-pink to blackish-purple ; often 

 in obscure longitudinal stripes ; orifice of shell rounded-trigonal . 



Var. (2) vesiculosus (young) (PI. 2, fig. 1^): exterior sm face of 

 the scuta impressed with small square holes, arranged in two or more 

 rows, radiating from the apex of the valve. 



Var. (3) validus (PI. 1, figs, c, f infra) : globulo-convex ; coarsely 

 ribbed, ribs flexuous ; either smooth or rugged ; pale chocolate purple or 

 pink ; shell extremely strong ; orifice almost circular. 



Var. (4) zebra (PL 1, tig. g) : conical ; rich chocolate purple with 

 broad snow-white ribs ; sheath bright chesnut colour ; summits of alee 

 oblique ; orifice almost circular. 



Var. (5) crispatus (Schroter) (PL 1, fig. h) : pale blueish or pinkish- 

 purple, with irregular rough projections, or with short, sharp, needle- 



* Chenu gives several admirable figures of this species ; but he confounds 

 some forms certainly distinct under this name, for instance the B. tulipiformis 

 of this work. 



