THE SESSILE BARNACLES. 347 



Plate .IG. 



Balanns bahinus (Liimjieus). Page 149. 



Ficis. 1-1 />. Aberdare Channel. Two groups, natural size, and basal view of 

 rostrum. 

 2, 2(1. 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 conii>artnients of 



two specimens growing together. The exterior is like plule 34, 

 fig. 1. 



4. Albatross station 32S9, Bering Sea. Cat. No. 48017, U.S.N.M. 



Growing on ('Inijsoilomus. See also plate 3;>, fig. Of 



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



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



34, tig. 2, to show long lamelLie 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 lamellne of the outer lamina. 



8. Cai»e I'rince of Wales, Alaska. Cat. No. 4801S, U.S.N.M. Lateral 



and carinal views of specimens seated on Chrtjsoitoiitus. Ileiglit 

 of right-hand specimen, 27 nnn. 

 Figs. 1, lb, 2, 4, and S about natural size, the others enlarged. 



Plate 36. 



Fig. 1. Balanns rostratns Hoek. Tokyo Hai-bor, Japan, No. 1814 A.N.S.P. 

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

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



3. Balanns rostratus a pert us Pilsbry. Albatross station 2849. Cat. 



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



4. Balanns rostratus apcrtus Pilsbry. Captains Bay, Unalaska. Cat. 



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

 sculpture. Page 144. 



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



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

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



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



Typical spongicolous form, spinose and with deeply concave 

 l)asis. Cat. No. 9190, U.S.N.M. Page 144. 



7, 7fl, 8. Balanus rostratus heteropus Pilsbry. Albatross station 2804. 

 I»uget Sound, Washington. Cat. No. 48022 U.S.N.INL Type and 

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

 ment filed to show the parietal tubes. Page 142. 



9. Balanus balanus pugetensis IMlsl)ry. Albatross station 2864. Cat. 



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



^(),'\0a, 10b. Balanus balanus puoetensis Pilsbry. San Juan Islands, Puget 



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



parietal tubes ; tergum, and scutum. Page 103. 



