42 Geological Society. 



rior lymphatic hearts lie on each side upon the great transverse pro- 

 cess of the third vertebra, immediately under the posterior end of the 

 scapula, and they are nearly as large as the posterior hearts. They 

 receive the lymph of the anterior parts of the body, and probably also 

 that of the intestinal canal, in order to transmit it into contiguous 

 veins, which pour their contents into the jugular vein. The author 

 has discovered similar organs in the toad, the salamander, and the 

 green lizard j and is of opinion that they exist in all the amphibia. 



GEOLOGICAL SOCIETY. 

 [President's Address, concluded from p. 475.] 



General Geology and Physical Geography. — Geologists have 

 long felt that a period would arrive, when every geographer would 

 seek to obtain a competent acquaintance with what may be termed 

 the anatomy of his subject; and it is therefore gratifying to remark, 

 that the past year has been prolific in works explanatory of the in- 

 timate association of geology with the physical geography of Great 

 Britain. 



England. — The encouragement which, at the suggestion of Colonel 

 Colby, the Board of Ordnance has afforded to all the surveyors who, 

 during their labours in the field, have kept a register of the mineral 

 changes accompanying variations of outline in the land, is now pro- 

 ducing the happiest results. 



Mr.Wright has already given us ample proof of this, in the geological 

 delineation of a tract of country around Ludlow, which, from repeated 

 personal examination, I can testify to be a model of accuracy. 



Mr. Maclauchlan, another of our Fellows, attached to the Ord- 

 nance Survey, has with equal success illuminated a much larger 

 surface of the Ordnance maps, comprehending the Forest of Dean, and 

 the central parts of Herefordshire. His details respecting the rich 

 coal-field in the Forest of Dean are of singular value, being de- 

 rived from the observations of so experienced a miner as Mr. 

 Mushett. 



Our Society has further been most advantageously connected with 

 the Ordnance Survey, by the appointment of Mr. De la Beche to 

 affix geological colours to the maps of Devonshire, and portions of 

 Somerset, Dorset, and Cornwall. From our acquaintance with the 

 skill of this geologist, and from his long practice in the districts which 

 he has undertaken to represent, it is certain that he will furnish many 

 striking examples of the value of well-defined physical features, in 

 enabling the geologist to explain the relation of the present outline 

 of the land to ancient subterranean movements. 



The adoption of a fixed scale of colours by all English geologists 

 is still an essential desideratum in this department; and I am happy 

 to have it in my power to state, that a systematic arrangement 

 will shortly be submitted to you, after it has undergone the super- 

 vision of our Council, and shall have met with the approval of the 

 Board of Ordnance. This scale, being founded on the principle of 

 employing such colours only as are fixed and distinct from each other, 

 has been suggested by our valued member Mr. Chantrey, who, by 



