OIRRIPEDIA FROAf THE PAOIFIC COAST OF NORTH AMERICA. 201 



Balanus, sp. undct. 



Two very large barnacles were taken at Albatross station 4209, Admiralty Inlet near Port Townsend, ■ 

 Wash., on rocky, coarse sand and shell bottom in 25 fathoms. I have been unable to identify them 

 with any described form, but since they are much worn externally and riddled by boring sponges, study 

 of them is defeiTed until better preserved material comes to hand. The cup is remarkable for the 

 deeply concave pocketdike biUJe and tlie smooth interior walls of tlio jiarietes. 



Balauus glandula Darwin. 

 Biihinns g'.umftilij Barwin, Moiing, IJalanidiii, |>. 20.}. 



Quarantine station. Port Townsend, Wash., on Purpura cri^pata. Albatross station 4219, .Vdmiralty 

 Inlet in tlie same vicinity in about 16 fathoms, on broken ga,stropod shells. Other Alaskan localitie.- 

 are Sitka aiul Unalaska. collector Dr. Benjamin Sharp, in collections of Academy of Natural Sciences of 

 Philadelphia. Specimens were also taken at Nanaimo Bay, on shore, by Prof. H. Heath. This is a 

 common Alaskan barnacle. 



Balanus sj). 



Albatross station 44.')7. off Point Pinos Light-House, Hi fathoms, on a gorgonian. Inimalurc 



Balanus sp. 



Albatross station 45f)l, Santa Cruz Light-House, l.j fathoms. Immature specimens on waterlogged 

 twigs, caught in the tangles. 



Balanus flos, n. sp. 



[PI. IX. lig. 1-7.] 



A species of Darwin's section C, somewhat related to B. spotuiicola Brown. Base and parietes 

 porous, radii solid. 



The wall is high, steep, and tubular, with somewhat square base and aperture, jjink imtside and 

 within. The parietes usually have a few rather strong riljs, lint may be nearly smooth. The radii 

 are smooth, with strongly serrate edges, and slope very steeply from the apices. The alie are smooth, 

 very narrow, with smooth edges. The apices of the plates project as strong teeth around the aperture 

 and are more or less recui'ved, giving it a corolla-like appearance, the aperture being nearly as large as 

 the base. The inner submargins of the ala? are sculptured with slender thread-like transverse raised 

 lines especially developed in the carina and carino-lateral plates. Below the sheath the inner surfaces 

 of the parietes are white and are longitudinally grooved, as usual. The base is rather thin, but porous. 

 The opercular plates are white. 



The scutum (pi. ix, fig. 3, 6, 7) is triangular, with strongly recurved apex and low sculpture of flat- 

 tened, unequal wrinkles parallel to the liasal margin. There are no noticeable radial lines, though an 

 extremely indistinct and fine striation is discernible under a strong lens. Internally (fig. 6) there is a 

 small, low articular ridge and a small adductor ridge occupying the median third of the valve's length 

 and not confluent with the articular ridge. The muscles are inserted so superficially as to leave no 

 pits, the inner faces of the valves being remarkably flat. The narrow occludent margin is marked 

 with ver>' oblique sulci. 



The tergum (pi. ix, fig. 4, 5) is not beaked apically. Very faint longitudinal striae may be traced 

 along the carinal margin, but elsewhere the plate is sculptured with low, wide-spaced growth marks. 

 There is no furrow running to the spur, but the growth-lines are deeply sinuated where it should be. The 

 spur is short and rather wide. Inside there is a strong, elevated, and acute articular ridge, no noticeable 

 articular furrow, and the ridge running to the spur is very low. Crests for the attachment of depressor 

 muscles are very small. The scutal margin of the tergum is evenly concave. 



Length of the wall at l)ase 12 mm., breadth 11. .5 mm., height 16 mm. Length of the aperture 

 from apex of the carina to apex of the rostrum, 10 mm. 



