Dr. Arnott on some new or rare Indian Plants. 85 



guineus : a name first suggested for it by Mr. Jenyns in his 

 ' Catalogue of British Vertebrate Animals/ and referred to as 

 a synonym for the fourth species of Syngnathus in his ' Ma- 

 nual of the British Vertebrate Animals/ page 487. 



The British Syngnathi, as suggested by Mr. Jenyns, con- 

 sist of 6 species : 2 marsupial pipe-fish, S. Acus and S. Typhle, 

 having true caudal fins ; 4 ophidial pipe-fish, which may be 

 again divided into 2 sections, the first of which contains 2 spe- 

 cies, S. cequoreus and S. anguineus, having each a rudimentary 

 caudal fin ; the second section also containing 2 species, S. 

 Ophidion and S. lumbriciformis, in which there is no rudi- 

 mentary caudal fin, the round tail ending in a fine point. 



In the recent works on British Fishes, one by Mr. Jenyns 

 the other by myself, we had considered the figure of Blocks 

 Ophidion as representing the true Ophidion of Linnaeus, which 

 as here admitted is not the case : Mr. Jenyns has described 

 the true Ophidion under the name of lumbriciformis, and I 

 inserted the true lumbriciformis but omitted the true Ophidion 

 altogether. I acknowledge with pleasure my obligations to 

 M. Fries for setting me right. 



Ryder Street, Feb. 18, 1839. 



X. — Descriptions of some new or rare Indian Plants. By 

 G. A. W. Arnott, Esq., LL.D. 



[Continued from p. 23.] 

 Balsamodexdrox, Kunth (Burseracece) . 



In the e Prodromus Florae Peninsulae Indiae Orientalist i. p. 

 176, Dr. Wight and I united this as a subgenus to Protium, 

 and it still appears to me doubtful if the two be separated by 

 sufficiently important characters : the habit is, however, very 

 different. In consequence of the addition of several new spe- 

 cies, the character given by Dr. Wight and me, will require to 

 be slightly altered, as follows : 



Calyx late vel tubuloso-campanulatus : torus disciformis in fundo 

 calycis ovarium cingens, externe inter singula stamina verrucula ele- 

 vata instructus : stamina octo : drupa ovata : nux obtusa angulata. 



From this it is obvious that the shape of the calyx and nut 



