THE CRUSTACEA OF NEW JERSEY. 163 



Section Coronul.E. 



Scutum and tergum (when both present) not overlapping 

 each other, or articulated together. Basis membranous. Parietes 

 often deeply folded, with outer lamina, towards basis, generally 

 imperfect. Each branchia composed of two plicated folds. 

 Shells attached to living vertebrata. 



Genus CORONULA Lamarck. 



Tlic IVhalc Barnacles. 



Corouula Lamarck. Ann. Mus. H. Nat. Paris, I, 1802, p. (468) 473. Type 



Lcpas balccnaris Gmelin, monotypic. 

 Diadema Schumacher, Ess. Nouv. Syst., 181 7, pp. 39, 40. Type Lepas diadeiiia 



Linnaeus, monotypic. 

 Cefopirus Ranzani, Mem. Stor. Nat., 1820. p. — . Type Lcpas balccnaris 



Gmelin. (Not consulted.) 

 Polylepas (Klein) Gray, Ann. Philos. (n. s.), X, 1825, p. 105. Tj-pe Lcpas 



diadema Linnaeus, first species. 



Compartments six. of equal sizes. \\'alls thin, deeply folded, 

 with folds forming cavities, open only on under side of shell. 

 Opercular valves much smaller than orifice of shell. 



Species world-wide in distribution, found attached to Cetacea. 



Coronula diadema (Linngeus). 



Plate 49. 



IV hale Barancle. 



Lcpas diadema Linnseus. Syst. Nat., Ed. 12, 1767, p. 1108. Marc Mcditcrra- 



neiim et IndiciDu. 

 Coronula diadema De Kay. N. Y. Fauna, Moll., V, 1S43, p. 250. Off Sandy 



Hook, N. J. (on whale). 



Darwin, Monogr. Cirrip., 1854. p. 417. PI. 15, figs. 3, 3a-3b, PI. 16, figs. 



I, 2, 7. United States. 



S. L Smith, Rep. U. S. F. Com.. L 1871-72 (1873), p. 579. Whole North 



Atlantic (on whales south of Cape Cod). 



]\L J. Rathbun, Occas. Papers Boston Soc. N. Hist., VH, No. 5, 1905, 



p. 80. On whales north and south of Cape Cod. 

 Coronula bala:naris (nee Gmelin) De Kay, N. C. Fauna, Moll., V. 1843, p. 

 251. Off Sandy Hook, New Jersey (on whale). 



