THE SESSILE BARNACLES. 



115 



Locality. 



Donor or collector. 



Notes. 



San Diego, California 



Hagdalena Bay, Lower California 



Head of Conception Bay, Gulf of California . 



Manzanillo , Colima, Mexico 



Panama 



lyo, Japan 



Japan 



Hayama, near Kamakura, Sagami 



Misaki, Sagami 



Hirado, Hizen, Japan . . . 

 Kagoshima Bay, Japan . 



Kagoshima, Japan 



Philippines 



Cape Cod, on whaler from West Indies. 

 St. Michael, Azores 



R. E. C. Stearns 



C. R. Orcutt 



Paul Bartsch 



C. R. Orcutt 



Dr. W.S. W.Ruschenberger 



Y. Hirase 



Imperial University, Tokyo 



A. C. Hartshorne 



Imperial University of To- 

 kyo. 



Y.Hirase 



North Pacific exploring 

 expedition. 



Imperial University of To- 

 kyo. 



Walter Hough 



A. E. Verrill.. 



On Tcgula. 



On drifted pile. 

 Coll. A. N. S. P. 

 Do. 



Coll. A. N.S. P. 

 On Fusus. 



Coll. A. N. S. P. 



No opercular valves. 



On Charonia lampas 

 ( Tritonnodiferus). 



BALANUS SPONGICOLA Brown. 

 Plate 25, figs. 2, 3, 4-4c. 



1827. Balanus spongicula Leach MS., BROWN, x Illustrations of the Conchology 



of Great Britain and Ireland, pi. 7, figs. 6, 14, 15. 

 1844. Balanus spongicola BROWN, Illustrations of the Recent Conchology of 



Great Britain and Ireland, ed. 2, p. 121, pi. 53, figs. 14, 15, 16. 

 1854. Balanus spongicola Brown, DARWIN, Monograph, p. 225, pi. 4, figs, la-lc. 

 1907. Balanus spongicola Brown, GRUVEL, Bull. Soc. Zool. de France, vol. 32, 



p. 164. 



Type. Present location unknown; from Weymouth, Devon. 



Distribution. Southern England, Wales, and Ireland to the Med- 

 iterranean; Lagulhas Bank, Cape of Good Hope; off Patros Island, 

 Brazil (Rathbun); La Guayra and Caracas (Weltner); Chagos Archi- 

 pelago, and Seychelles (Gruvel). 



The barnacle is conic or conic- tubular; pompeian red, deep helle- 

 bore red, or varying in tint to nearly white on the rostral side; 

 radii red or white; walls smooth, the orifice toothed. 



Scutum with unequal radial grooves, part of them deeply engraved, 

 cutting the strongly developed growth-ridges into small beads. 

 Articular ridge small; adductor ridge small and short, merely forming 

 a raised border of the adductor pit. There is a rather deep and 

 narrow pit for the lateral depressor muscle. 



The tergum has the apex tinted, produced into an acute beak project- 

 ing above the scuta; exterior nearly flat, band running to the spur 

 being but very slightly sunken. Spur is about one-third the width 

 of the valve, obliquely truncate at the end, the basal margin on the 

 carinal side sloping into it in a nearly straight or slightly concave 

 line (fig. 30a, &, Exmouth.) Crests for the depressor muscles are 

 rather weakly developed. 



1 The original spelling spongicula was corrected by Captain Brown in the later edition of his work. We 

 may assume that it was a typographical error. 



