THE SESSILE BARNACLES. 349 



Plate 40. 

 Balanus crcnatiift Bruf^iiitTo. Page 105. 



Fig. 1. Newfoundland Rank, in 35 fathoms. Alhatrnsa station 2443. Cat. 

 No. 48029, U.S.N.M. Characteristic Rroup, growing on shell of 

 Buccinum. 



2. Newfoundland Bank, 39 fathoms. Albatross .station 2449. Soli- 



tary columnar form. Cat. No. 48030, U.S.N.M. 



3. Sable Island, Nova Scotia. Growing on bark. Cat. No. 48031, 



U.S.N.M. 

 4, 4a. Inglelield Gulf, Greenland., Cat. No. 24911, U.S.N.M. Lateral com- 

 partment and interior view of rostrum. 

 5, 5a, 5b. Newfoundland Bank. Cat. No. 48032, U.S.N.IM. Flaring and bell- 

 shaped solitary specimens, one having the lateral compartments 

 removed on one side to show the strong sutural ridges in the 

 cavity. 

 G. Fishing baidcs. Cat. No. 9215, U.S.N.M. Growing on the shell of 

 C II rt 0(1 a via, which also supports a coral (gift of Gloucester 

 tisherman). 



All figures except 4 and Aa are natural size. 



Plate 41. 



Fig. 1. Balanus crcnatus ciirriscutuin I'ilsbry. Unalaska. Cat. No. 9201, 

 U.S.N.M. Interior of tergum, showing narrow spur. See fig. 4. 



Page 175. 



2-2b. Balanus crewo/HS Bruguiere. Tacoma, Washington. Cat. No. 48033, 



U.S.N.M. Nearly smooth specimen on a smooth pebble. Page 171. 



3, 3rt. Balanus crcnatus V,r\v^\wYe. Bering Sea. .47&flYro.ss station 2462. 



Cat. No. 48034, U.S.N.IVI. Ribbed form, on gastropod. Page 171. 



4. B. c. curviscutum Pilsbry. Unalaska. Cat, No. 9201, U.S.N.M. 



Entire individual and ba.ses of four others, on Hfi/tilus edulis. 

 See also fig. 1. Page 175. 



5. B. crenatus Bruguiere. Alaska. Cat. No. 48035, U.S.N.M. 



Page 171. 



G-6c. B. crcnatus Bruguiere. Alaska. Albatross station 851. Cat. No. 



4803G, U.S.N.M. Smooth cylindric or liliaceous forms, witli 



wide radii when crowded ; more conic, with narrow radii when 



growing alone (fig. G). Page 172. 



Plate 42. 



Figs. 1-1 ?>. Balanus crcnatus curviscutum Pilsbry. Bristol Bay, Alaska. Cat. 

 No. 48037. U.S.N.M. Fig. 1 is 11.5 mm. high. Page 175. 



2-2(7. B. c. curviscutum. Albatross station 3232, Bristol Bi\y, Alaska. 

 Cat. No. 32948, U.S.N.M. Crowded, cylindric form. Fig. 2c rep- 

 resents specimen 20 mm. long. Page 175. 

 3-36. Balanus crenatus delicatus Pilsbry. Humbolt Bar, California. Cat. 

 No. 48039, U.S.N.M. Altitude of fig. 3, 13.25 mm. Page 177. 



