Miscellaneous. 119 



confusalis it follows closely the iiiaer edge of the dark fascia, 

 and the fascia itself is darkest in the centre, and becomes 

 again tinged with violet towards the hind margin. There is 

 generally present a third much smaller white sp:>t towards the 

 base of cell of fore wings. In both forms the white fringes 

 have a broad dark basal line, which is interrupted above the 

 anal angle of both wings, and the whole of the fringe at the 

 middle of each margin is dark from base to apex. 



Expanse of wings 34 millim. ; condusalis expands 26 to 

 28 millim. 



In Walker's description of condusalis he calls the first of 

 the two white spots in the fore wings a white " dot," and tlie 

 spot is, in fact, very small in the type specimen ; but, as a 

 rule, the first spot forms an oblique oval ; in violalis both 

 spots are in general narrower towards the inner margin than 

 in condusalis. 



[To be continued.] 



MISCELLANEOUS. 



On a Collection of Barnacles. By H. A. Pilsbrt. 



The barnacles described were obtained from the bottom of the 

 iron ship ' Puritan ' of Glasgow, which had been dry-docked in 

 Cramp's shipyard after a voyage from San Francisco to Hong Kong, 

 and to Philadelphia via Java and India. The forms represented 

 were BaJanas tintinnahulum, L., B. tintinnahulwn zebra, Darwin, 

 B. tintinnahulum S2}inosHS, Gm., Tetradita porosa patelluris, Darwin, 

 Lepas anatifera, L., and L. Hillii, Leach. The forms ranked as 

 varieties of B. tintinnahidum retain their individuality perfectly, 

 although growing side by side under apparently identical external 

 conditions, so that their differential characteristics can scarcely be 

 attributed to unlike environmental factors. The variety of Tetra- 

 dita porosa seems to be a rare form, originally described by Darwin 

 from three examples taken off a ship's bottom in Boston by Dr. A. A. 

 Gould. It is very unlike the ordinary form of the species. Speci- 

 mens of Ostrcea rivularis, Gld., are attached to some of the barnacles. 

 As this is a species of East-Asian seas, it is very probable that the 

 load of barnacles was obtained in China, although the Balanidae them- 

 selves have been so widely diffused by commerce that alone they 

 afford but little evidence of their original patria. The specimens 

 were procured and presented to the Academy by Master Lester 

 Bernstein, — Proc. Acad. Nat, Sci. Philad., March 31, 1896 

 p. 208. 



