THE SESSILE BARNACLES. Gl 



is a medium-sized barnacle; diameter 1^, height 1 inch; radii shaded 

 bluish and white; parietes vertically striate, hghter than the radii, 

 of a reddish color, thickly beset with spines for haKway up from the 

 base. Smaller opercular plates are white, the larger (scuta) are 

 dai'k blue with sculpture of serpentine (geschldngelten) transverse 

 striffi. 



Schroter's figure represents a profusely spinose barnacle very 

 similar to well-developed B. t. occator. The blue radii and scuta also 

 favor this variety, which is usually mai'ked with violet. The form 

 of the terga and color of the sheath, characteristic marks of occator, 

 are not mentioned or figured by Schroter, so tliat I do not think we 

 would be justified in substituting the name crispatus for occator. 

 Unless the type can be found, crispatus would better be dropped as 

 not certainly identifiable. 



Darwin states of the form (or forms) which he included under var. 

 cnspatus Schroter, that they have "scuta with theii' exterior surface 

 either plain or with radiating fines formed of hoodlike projecting 

 points;" and on page 201 he adds that the scutum is "broader and 

 flatter than in var. communis, and the adductor ridge is very feebly 

 developed." This last character does not agi*ee with the type lot of 

 B. t. volcano, which has scuta with the adductor ridge rather strongly 

 developed and massive, but some specimens before me from ships' 

 bottoms have it only moderately developed. It seems likely that 

 Dai'win's specimens ^vitll "plain" scuta (that is, witli growth-ridges 

 only) belong to another race. 



Under the circumstances, it seems best to describe the Japanese 

 form as a new subspecies, in view of the suspicion that at least two 

 and perhaps three races have been kno^vll as cnspatus, and the 

 practical certainty that the form now called volcano is not the original 

 Lcpas crispata of Schroter. I may add that tJie specimens of Schroter 

 and Darwin were off of ships, and no locality is laiown for them, 

 though they may be presumed to be of East Indian origin. 



Another obscure spinose barnacle is Lcpas ccliinata Spengler.* 

 Wliile I have not been aide to match the figure of this form, it seems 

 rather characteristic, and may prove recognizable when the exact 

 race is encountered again. 



BALANUS TINTINNABULUM ROSA, new subspecies. 



Type.— Cat. No. 43494, U.S.N.M., from Azabu, Japan. 



The barnacle is conic or subcylindric, witli a rather large, broadly 

 and acutely ovate aperture; roseate (between pomegranate-purple 

 and Indian-lake of Ridgway's Color Standards), the parietes of 

 rostrum and lateral compartments paler than the carina, the radii a 

 deeper shade of the same color. Parietes smooth. Hadii with 

 horizontal summits. Sheath a duller shade of the extermd color. 



1 Skrivter af Naturhistorie Selskabet, vol. 1, 1790, p. 177. 



