2 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 65. 



have no transverse septa; they are often wholly filled up in the 

 fossils. In the largest specimens there are about 26 tubes in the 

 rostrum. The basis is densely porose, the pores septate towards 

 the peripheral parts. Many specimens retain part of the color, 

 being pink or clouded with pink. Opercular valves unknown. 

 Carinorostral diameter 24 mm.; height 18 mm. 

 This barnacle does not differ in the walls from B. concavus p(wifi- 

 cus, recent and Pleistocene in southern and Lower California; but 

 as the several subspecies of B. concaims differ in the sculpture of 

 the opercular valves, it is quite possible that these, when found, 

 will show differences from the west coast form. At present the 

 special name eseptatus is given to the Haitian form. Until the 

 opercular valves can be examined, this seems less likely to lead to 

 error than a provisional identification with the Californian B. c. 



pacificus. 



It differs from the Miocene subspecies of concamis from the 

 Atlantic coastal plain and the Panama Canal Zone by various 

 features of the walls, especially the entire absence of transverse 

 septa in the parietal pores. 



Station 9464 (W 151 F). Departement de I'Ouest, north edge 

 of Port au Prince, along road leading up to dwelling houses of 

 Haytian-American Sugar Co. From beds of Miocene age, 75 m. 

 above the sea. Numerous specimens collected by W. P. Woodnng. 



Type.— C^t. No. 352257, U.S.N.M. 



BALANUS POLYPORUS, new species 



Plate 1, fig. c. 



The walls are somewhat roughened but not ribbed, the radii wide. 

 The parietal tubes are narrow and very numerous, 33 in the rostrum 

 of the type, not transversely septate. The basis is calcareous, and 

 where examined near the edge is not porose. 



In the type specimen the rostrum is notably longer than the other 

 plaies, as in Memlranohalanus, bwt this is doubtless merely an ac- 

 cident of station. ^ 



Carinorostral diameter 13 mm.; length of rostrum 1^ mm. 



The numerous narrow and nonseptate tubes of the parietes differ- 

 entiate this form from known American species; but as the opercular 

 plates have not been obtained, its affinities are uncertain. Like all 

 of the species treated in this paper, it belongs to the typical sub- 

 genus of Balanus. , 



Station 9750 (B 358 F) . Miocene beds, same locality as 9464. One 

 specimen collected by J. S. Brown. 



Type.— C^i. No. 352258, U.S.N.M. 



