140 
Cotswold Naturalists^ Club. 
lithographic drawings, illustrative of the species described in his 
‘ History of the Birds of Jamaica.’ The figures will be drawn on the 
stone by the author himself, partly from original drawings and partly 
from preserved specimens, with the advantage of his own notes and 
personal knowledge of attitudes, &c. ; and they will be very carefully 
coloured. The number of species proposed to be illustrated amounts 
to about a hundred and twenty ; of which more than one-half are not 
figured in English works, worthy of reference, while a considerable 
number are new to science. 
The work is to be issued monthly, and is not to exceed the extent 
of thirty numbers. 
PROCEEDINGS OF LEARNED SOCIETIES. 
COTSWOLD NATURALISTS^ CLUB. 
At a Meeting of the Cotsw'old Naturalists’ Club, held at Rodbo- 
rough Common, May 18th, 1847, Dr. Wright of Cheltenham exhi- 
bited a beautiful preparation of the Geophilus longicornis, Leach, in 
which he had observed the veneniferous glands of that Myriapod. 
He had found no description of these glands in any of the great 
authorities on the structure of the articulate animals whom he had 
consulted, from which he inferred that these bodies had hitherto 
escaped observation. 
Dr. Wright observed that the salivary glands in the vertebrate 
animals are in general absent in those classes and tribes which live 
habitually in water. In Fishes they are absent, an increased mucous 
secretion being poured into the mouth by a great development of 
the buccal follicles. In Batrachia distinct glands are absent, a com- 
pensative secretion being supplied by the mucous glands of the 
mouth and tongue. In the Cetacea they exist only in a rudimentary 
state. Hence the conclusion that animals that seize their prey in 
the water and swallow it without mastication have no necessity for 
saliva as a preliminary solvent for the digestive process, the gastric 
juice in these animals being sufficient to complete the chemical 
changes in the stomach. In the invertebrate classes salivary glands 
are absent in all the Radiata, nor do we observe these bodies in 
the Tunicated or Acephalous Mollusca ; but they are found in the 
Gasteropoda and Cephalopoda ; they are absent in the Entozoa, but 
exist in a rudimental state in the Annelida and Crustacea. In all 
the classes of the Articulata that respire air, as Myriapoda, Insecta 
and Arachnida, salivary vessels can be demonstrated : these organs 
may be subdivided into simple and compound glands. 
A. When the secretion supplied is a fluid concerned in the di- 
gestive process, the secreting organ is a simple tube wdth its distal 
extremity closed. 
B. When the secretion supplied is used for the destruction of 
prey, the secreting organ is a compound body or gland. 
In the majority of Insecta the salivary vessels are simple ramified 
tubes that open into the gullet, but in Hemiptera simple tubes and 
