Mr. A. Adams on new Species of Acephalous Mollusca. 2238 
alternate, the secondary are trichotomous, each forklet bearing 
three pedicellated flowers at its apex; the pedicles are 1 line 
long, and the flower expanded 3-4 lines diameter. The drupe 
is 11 inch long, 9 lines diameter; the putamen is ligneous, its’ 
sides being 2 lines thick, its cell 5 lines in diameter, with the 
false septum, 1 line in thickness, reaching to the axis of the cell; 
the testa measures 5 lines across, and the tegmen 3 lines, both 
plicated in a horse-shoe form round the false septum. In the 
fruit I examined, the embryo was not perfected*. 
2. Bursinopetalum macrophyllum, Thw. in Hook. Kew Journ. 
Bot. vii. 242; Enum. Pl. Zeyl. 43 ;—ramulis strictis, sub- 
angulatis, opacis, fuscis; foliis ovato-oblongis, imo subacutis, 
. et in petiolum subdecurrentibus, apice rotundato-obtusis, 
marginibus valde revolutis, subcoriaceis, supra fuscis, con- 
vexis, nervis invicem 7-8 venisque reticulatis utrinque promi- 
nulis, subtus subpallidis ; petiolo costaque latiusculis, superne 
_ planis; corymbo terminali.—Ceylon, v. s. im herb. meo; Ram- 
boddi, 5000 ped. altit. (Gardner, 100). 
This+ appears, by comparison with the foregoing, to be a 
very distinct species, as their characters respectively show. The’ 
leaves are 34—4: inches long, 2-21 inches broad, on a petiole of 
9 lines long and 2 lines broad. The fruit is of the same form,’ 
size, and structure as in the preceding species. 
3. Bursinopetalum tetrandrum, Thwaites, Enum. Pl. Zeyl. 1. 42.— 
Ceylon. 
_ I saw long since, in Sir Wm. Hooker’s herbarium, a plant 
collected in Malacca by Griffith, which in its habit and floral 
structure agrees with Bursinopetalum. Although its flowers are. 
tetrandrous, I hardly think it will be found identical with the 
Ceylon plant. : 
XXVI.—On some new Species of Acephalous Mollusca from the 
Sea of Japan. By Artuur Apams, F.L.S. &e, 
Genus Corsota, Bruguiére. 
Corbula amplexa, A. Adams. 
C. testa transversim ovata, subtrigonali, valde ineequivalvi, ssepe 
epidermide tenui fusca induta; valva extra valvam sinistram 
amplectente, tenui, alba, concentrice striata,ad marginem ventralem 
* Structural details of this species will be shown in the ‘ Contributions, 
vol. ii. pl. 73. s 
+ A figure of this plant and section of its fruit will be given in the same 
work, pl. 73. : : ; 
16% 
