108 



BULLETIN 93, UNITED STATES NATIONAL MUSEUM. 



i This locality, if authentic, carries JB. c. pacificus well north of the greater part of its faunal associates 

 in southern California. The distribution of the species on the coast above Monterey needs further 

 investigation. 



BALANUS CONCAVUS COOSENSIS Dall. 



1909. Balanus tintinndbulum coosensis DALL, The Miocene of Astoria and Coos 

 Bay, Oregon, U. S. Geol. Survey, Professional Paper No. 59, p. 138, pi. 19, 

 figs. 1, 6. 



This is a very large form from the Miocene of Coos Bay, Oregon, the 

 greatest diameter 50 mm. Parietes smooth; radii with oblique 

 summits, thereby agreeing with most forms of concavus, but differing 

 from B. tintinnalulum and B. concavus pacificus. The parietal tubes 

 of one of the type lot have no transverse septa. There are about 

 39 tubes in the rostrum. The radii are not porous. It is therefore 

 not related to B. tintinnabulum, which has not been found fossil in 

 America, and is represented in the recent fauna by quite different 

 forms. The opercular valves of B. c. coosensis have not been found, 

 so that the reference to B. concavus, though probable, is provisional. 



A rather strongly ribbed barnacle from the Lower Miocene or 

 Upper Oligocene of Ventura County, California, has been referred to 

 B. concavus by Kalph Arnold. 1 It resembles B. c. glyptopoma exter- 

 nally, but the opercular valves and structure of the wall are unknown. 



BALANUS REGALIS, new species. 

 Plate 21, figs. 4, 4a. 



Type. Cat. No. 43485, U.S.N.M., from Point Abreojos, west coast 

 of Lower California. Albatross, March 14 , 1911. 



A large, strong barnacle. The walls form a cone strongly bent 

 toward the rostrum. Parietes rather finely, irregularly ribbed and 

 with large folds near the base. Color, from old rose to Vandyke red 

 and dahlia carmine, clouded with white, the sheath and ulterior pale 

 flesh-tinted. Aperture broadly ovate. 



The carina and carinal latera are closely united by linear sutures, 

 externally visible with difficulty. The other sutures are deep, narrow 

 clefts. Radii are extremely narrow, almost wanting, or represented by 

 irregular, roughened ledges, their summits very oblique, their edges 

 very irregularly crenulated, and not in contact with the broad, 



U. S. Geol. Surv. Bull. 309, pi. 32, fig. 5. 



