LEPAS. 25 



diameter, and an inch, or near an inch and a half high ; it is 

 composed of six strongly ribbed valves, which, with their six 

 interstices, divide the outer surface into twelve triangular 

 compartments, and the transverse striae are beautifully cre- 

 nulated on the former, but not on the latter ; within are six 

 plates forming a funnel-shaped cavity, and at the bottom of 

 the shell these are seen to be connected with the outer cir- 

 cumference, by numerous radiated partitions forming narrow 

 cells : the colour is dirty white. 



bal^enaris. 24. Shell depressed ; valves with 

 longitudinal ribs of which the upper halves 

 are smooth, and the lower parts as well as 

 the interstices striated transversely. 



Lepas balaenaris. Gmelin, p. 3208. Wood's Conch, p. 35. 



t. 5. f. 1. t. 3. 

 Lepas, No. 12, Schroeter Einl. iii. p. 530. 

 Balanus cucullus. Museum Geversianum, p. 478. 

 Rumphius, t. 14. f. H. Petiver Amh. t. 1. f. 11. Chem- 

 nitz, viii. t. 99- f- 845 and 846. 

 Inhabits the Northern Ocean on Balaena Boops. Gmelin. 

 This shell is smaller and much more depressed than L. Dia- 

 dema, from which it also differs in having a smaller aperture, 

 and in the cavity not being funnel-shaped, but broadest at the 

 bottom ; the longitudinal ribs also are much flatter, and are 

 only marked with transverse stria? towards the base ; it is 

 said to be found only on the pectoral wrinkles of the Balana 

 Boops. 



testudinaria. 25. Shell oval-depressed, with nearly 

 smooth valves, and deep narrow transversely 

 striated interstices. 



Lepas testudinaria. Linn mis Syst. Nat. p. 1108. Born. 



Mus. p. 10. Chemnitz, viii. p. 328. t. 99. f. 847 and 



S48. Schroeter Einl. iii. p. 51 6. Gmelin, p. 3209. 



Barbufs Verm. ii. p. 12. t. 1. f. 8. Wood's Conch, p. 



37. t. 5. f. 4. 

 Balanus ovatus. Gronovius Zoophyl. p. 257- 

 Balanus testudinarius. Bruguiere Erie. Method, p. 172. 

 Bonanni Kirch. 1. f. 36. and Rec. Sup. f. 1. Rumphius, 



t. 40. f. K. Plancus Conch, t. 5. f. 2. Gualter, t. 106. 



f. M. Petiver Mus. t. 9. f. 9. Phil. Trans, l. t. 34. 



f. 12. Klein. Ost. t. 12. f. 99. Knorr. iii. t. 30. f. 3 



