316 Characters of Three Genera of Indian Plants, 



Frutex ramostis. Rami glabri, purpurascentes, teretes ; novelli complanati. 

 Folia altema, coriacea, glabra, IcBvia, petiolata, exstipulata, repando-serrata^ 

 serraturis mucronatis, penninervia, subcoriacea ; nervis parallelis, simplicibus. 

 Petiolus canaliculatus, bad dilatatus, semiamplexicaulis. Spicae paniculatcB 

 terminales et efoliorum axillis superiorumj folia subcequantes. Fiores sessiles, 

 secundi, bast bibracteati. 



1. S. castaneifolia, Vahl. ; a ; Vahlii, *' foliis parum attenuatis, basi apice 

 acutis." — S. castaneifolia, Vahl in Skrift. Naturh. Selsk. Kiobenh. G. p. 122. — 

 /J. Grahamii, foliis basi apice obtusiusculis.— Pleurodesmia Grahamii, Arn. mss. 

 Hab. Cejlon. 



My specimen, from Dr Graham, has the leaves shorter and 

 more obtuse than Vahl attributes to his plant ; but I cannot look 

 on them as distinct species. I have also altered somewhat the 

 character given by Vahl : thus Vahl mentions only three petals, 

 one of which is larger than the others, and curled ; and one 

 ovary, with three styles ; but all the other points agree so well, 

 that now I have no doubt but two of the petals had fallen off 

 before he examined the flower, and that he was deceived into a 

 belief of there being only one ovary, by the thick coating of white 

 hairs, which at first sight obscures the true structure. It is, as 

 a genus, most allied in habit to Delima, but is easily distinguish- 

 ed by the structure of the stamens : in character it approaches 

 to Pleurandra, particularly to the section called Candolleana, 

 but differs in several particulars. 

 Ablaey, 2d December 1 833. 



ON THE STRUCTURE AND HABITS OF THE LIMNORIA TERE- 

 BRANS, A MINUTE CRUSTACEOUS ANIMAL, DESTRUCTIVE TO 

 MARINE WOODEN ERECTIONS, AS PIERS, &C. Bf/ JOHN 



Coldstream, M, D. M. W. S., Sfc, Communicated by the 

 Author*. 



History. 



The minute crustaceous animal which is the subject of it, 

 claims our attention, both on account of the peculiarity of its 

 habits, and its agency in the destruction of some valuable works 

 of public utility. It inhabits the ocean and its shores, dwelling 



• The description here given may be considered as to a certain extent sup- 

 plementary to that published by Dr Leach, in the Linnean Transactions, 

 vol. xi. p. 370. 



