90 THE VOYAGE OF H.M.S. CHALLENGEE. 



to vol. i. 761, he describes Entosthymenium, the single species being Entosthymenium 

 tristichum, which he says was sent from Dax by Grateloup to De Candolle's Herbarium. 

 No specimen is said by C. Miiller (Synopsis, ii. 635) to be now in Bridel's Herbarium ; 

 but if the description be compared with specimens of Gymnostomum curvirostrum, it will 

 be found to agree in all particulars, especially in his statement that the foliage is sub- 

 tristichous, a specific character elsewhere entirely overlooked. 



Two genera were thus described by Bridel without his claiming the European species, 

 Gymnostomum curvirostrum, which must belong to the first, and which is really identical 

 with the last ; so that of the species originally placed in Gymnostomum by Hedwig there 

 remained to represent that group only Gymnostomum tenue. 



It is a curious coincidence that Bridel (Bry. Univ., i. 376) finishes his account of his 

 Coscinodon verticillatus with "Cave ne cum Gymnostomo curvirostro habitu colore et vita 

 in calcareis satis simili commisceas," and the position assigned to these mosses in the last 

 edition of Schimper's Synopsis, showing that both had arrived at the same conclusions 

 as to their affinity, but also without seeing that they stood in the same relation to each 

 other as that observable among the species of Zygodon and Orthotriclmm, and thus that 

 Eucladium might be the peristomate state of Gymnostomum = Hymenostylium. 



Tortula melanocarpa, Mitt. 



Tvrtida melanocarpa, Mitt, in Journ. Linn. Soc. Lond., xv. 60. 

 Gymnostomum barbula, Schwaegrichen, ii. 1. 77, t. 175. 



Hyophila barbula, Hampe in Bot. Zeit., 1846, 267; C. Miiller, Synop. Muse. Frond., i. 558; Mitt., 

 Muse. Austr. Amer., in Journ. Linn. Soc. Lond,, xii. p. 136 (sub Weisid). 



Bermudas. — On calcareous matter. 



This species was wrongly described in the Journ. Linn. Soc. Lond., xv. 60, as having 

 a peristome, the capsule from which the description of that organ was taken being after- 

 wards found to belong to Tortula bermudana, with which it had been intermixed. The 

 figure given by Schwasgrichen well represents the moss, which was originally gathered in 

 Cuba, from whence Wright distributed his specimens. It is not recorded from any other 

 locality. On dissolving out the calcareous white substance in which the Bermudan 

 specimens were imbedded, the stems are found to have short branches, some of which 

 bear a male flower. The species is therefore monoecious ; and the male flower, which, 

 in all acrocarpous mosses, is the first produced, becomes lateral from growth of the 

 innovation bearing the female and at length the fruit, leaving the male, which had 

 been terminal, as if it were a secondary growth on a proper branch. 



Hyophila, Bridel (Bry. Univ., i. 760), was founded on a species now referred to 

 Entosthodon = Entosthodon roUleri, the Gymnostomum rottleri of Schwaegrichen, and 

 the Gymnostomum javanicum, Nees et Blume. This last, with some other similar or 

 allied mosses, stands in C. Midler's Synopsis as Section III., Hyophila, of his genus Pottia. 



