THE SESSILE BARNACLES. 347 



PLATE 35. 

 Balanus balanus (Linnreus). Page 149. 



FIGS. 1-16. Aberdare Channel. Two groups, natural size, and basal view of 



rostrum. 



2, 2ff. Georges Bank, Albatross station 2079. Lateral view of group and 

 basal margin, typically sculptured form with thin wall. 



3. Off Eastport, Maine. Basal view of the lateral compartments of 



two specimens growing together. The exterior is Hke plate 34, 

 fig. 1. 



4. Albatross station 3289, Bering Sea. Cat. No. 48017, U.S.N.M. 



Growing on Chrysodomus. See also plate 33, fig. Gc 



5. Georges Bank. Basal view of part of the rostrum. 



6. Portland, Maine. Part of the base of specimen figured in plate 



34, fig. 2, to show long lamellae depending from outer lamina 

 of the wall. 



7. Cork, Ireland. Cat. No. 12092, U.S.N.M. Basal view of lateral 



compartment to show long lamellae of the outer lamina. 



8. Cape Prince of Wales, Alaska. Cat. No. 48018, U.S.N.M. Lateral 



and carinal views of specimens seated on Chrysodomus. Height 

 of right-hand specimen, 27 mm. 

 Figs. 1, 16, 2, 4, and 8 about natural size, the others enlarged. 



PLATE 36. 



FIG. 1. Balanus rostratus Hoek. Tokyo Harbor, Japan, No. 1814 A.N.S.P. 

 2, 2. Balanus rostratus Hoek. Japan. Cat. No. 48019, U.S.N.M. Lat- 

 eral view and basal view of part of the rostrum. Page 138. 



3. Balanus rostratux apertus Pilsbry. Albatross station 2849. Cat. 



No. 48020, U.S.N.M. Smooth specimen growing on Tercbratulina. 



4. Balanus rostratus apertus Pilsbry. Captains Bay, Unalaska. Cat. 



No. 9191, U.S.N.M. Growing on Pectcn, and reproducing its 

 sculpture. Page 144. 



5. Balanus rostratus apertus. Albatross station 2849, on Terebratu- 



lina. Cat. No. 48020, U.S.N.M. Outer lamina of the lateral com- 

 partment filed, showing the parietal tubes. ' Page 144. 



6. Balanus rostratus apertus Pilsbry. Captains Harbor, Unalaska. 



Typical spongicolous form, spinose and with deeply concave 

 basis. Cat. No. 9190, U.S.N.M. . Page 144. 



7, 7, 8. Balanus rostratus heteropus Pilsbry. Albatross station 2864. 

 Puget Sound, Washington. Cat. No. 48022 U.S.N.M. Type and 

 paratype. Tergum and lateral view of wall, the lateral compart- 

 ment filed to show the parietal tubes. Page 142. 



9. Balanus balanus pugetcnsis Pilsbry. Albatross station 2864. Cat. 



No. 48021, U.S.N.M. Filed to show parietal tubes. Page 163. 



10, 10, 106. Balanus balanus pugetensis Pilsbry. San Juan Islands, Puget 



Sound. Type No. 2040 A.N.S.P. Lateral view, filed to show 



parietal tubes ; tergum, and scutum. Page 163. 



