NATURAL SCIENCES OP PHILADELPHIA. 473 



4. Genus Bryopa, Gray. 1840. 

 Bryopa, Gray, Syn. Brit. Mas. 1840. 



" Proc. Zool. Soc. p. 314, 1858. 

 H. and A. Adams, Genera, ii. p. 649, 1858. 

 Clavagella,* Lamarck, Anim. Sans. Vert. v. p. 430, 1818. 



" (Desh. edit.) Anim. Sans. Vert. vi. p. 22, 1835. 



Ferussac, Tabl. Syst. p, 45, 1822. 

 Delia Chiaje, Anim. Senza Vert. 

 Sowerby, Genera. 

 Blainviile, Malacol. p. 575, 1825. 

 Crouch, Introd. Lam. p. 5, 1827. 

 Rang, Man. Moll. p. 33S, 1829. 

 Broderip, Zool. Proc. London, p. 115, 1834. 



Zool. Trans. London, i. p. 261, 1835. 

 Owen, " " " i. p. 269, 1835. (Anatomy.) 



Cuvier, Regne Anim. (Audouin's edit.) 1836. 

 Th. Midler, Syn. Test. Viv. 1836. 

 Philippi, Weigmann's Archiv. fur Naturg. i. 1840. 



" Enum. Moll. Sicil. i. p. 1, 1836 ; ii. p. 1, 1844. 

 Reeve, Conch. Syst. 1843. 

 Hanley, Descriptive Catalogue, p. 2, 1842. 

 Cailliaud, Guerin's Mag. Zool. 1842. 



" Chenu's Illustrations Conch. 



Forbes, Report on JEgean Invert., Brit. Assoc, p. 142, 1S43. 

 Deshayes, Traite Elem. i. pt. 2, p. 16, 1843 '50. 



" Expl. Sci. de l'Algerie, Mollusques, p. 1. 



Catlow, Conch. Nomenc. p. 2, 1845. 

 Jay, Catalogue, 4th edit. p. 3, 1850. 

 H. and A. Adams, Genera, ii. p. 337, 1854. 

 Gray, Figs, of Moll. Anim. v. 1857. 

 Teredo, (partim,) Brocchi. 



Description. Valves flat, irregular, unequal, the right free, the left always 

 imbedded, when adult. Pallial sinus deep. Anterior muscular impression 

 small, posterior one large. 



Tube elongated, cylindrical, open at the posterior end, and furnished with 

 siphonal fringes ; the anterior or lower end compressed, clavate, simple, with 

 a minute central fissure. 



Subgenus Dacosta, Gray. 1858. 

 Dacosta, Gray, Zool. Proc. London, p. 315, 1858. 



H. and A. Adams, Genera, ii. p. 649, 1858. 



Posterior or upper end of the tube destitute of siphonal fringes. 



Subfamily 3. CLAVAGELLINiE, Gray. 1858. 



Distinguished from Bryopinae by the presence of radiated tubuli on the lower 

 end of the tube, thus forming a connecting link between Bryopinse and Peni- 

 cillinae. 



(Contains the fossil genus Clavagella.) 



Subfamily 4. PENICILLINS, Gray. 1858. 

 Shell with both valves imbedded in the walls of the tube, with their urn- 

 bones visible externally. Base of the tube ornamented with radiated tubuli, 

 containing tentacular processes originating in the animal's mantle. 



* The genus Clavagella, as characterized by Lamarck, includes those species (only 

 known in a fossil state) in which the lower end of the tube is surrounded by hollow 

 spinous processes. Lamarck included the recent species in his genus, under the impres- 

 sion, probably, that their tubes were incomplete. 



1861.] 



