PROCEEDINGS OF SCIENTIFIC SOCIETIES. 261 
Mr. Sclater also called attention to the extraordinay mimicry of the true 
rectrices by the elongated upper tail-coverts in Ciconia maguari and 
C. episcopus as observable in the living examples of these birds in the 
Society’s Gardens. ; 
Mr. Edward R. Alston exhibited, on behalf of Dr. Elliott Coues, two 
specimens of Synaptomys Cooperi. To this species—the type of Synaptomys, 
proposed in 1867 by Professor Baird as a subgenus of Myodes, full generic 
rank had been accorded by Dr. Coues in 1874. The present specimens 
were, so far as was known, the first typical specimens sent to Europe. 
Professor Huxley read a memoir on the Cray-fishes, in whieh he gave 
a review of the various generic divisions of this group of Podophthalmous 
Crustacea, and pointed out how remarkably these divisions corresponded 
with their geographical distribution. 
Professor W. H. Flower exhibited the skull of a two-horned Rhinoceros 
from Tipperah, and read a note on the peculiarities of its structure. 
A communication was read from Messrs. Godman, Salvin and Druce 
containing a catalogue of the Lepidoptera collected by Mr. S. N. Walter, in 
the Island of Billiton. 
Messrs. Godman and Salvin also read a list of the butterflies collected 
in Eastern New Guinea and some neighbouring Islands by Dr. Comrie, 
during the voyage of H.M.S. ‘ Basilisk.’ 
Mr. A. G. Butler read a paper containing the description of a new 
species of the orthopterous genus Phylloptera from Madagascar, which he 
proposed to name Phylloptera segonoides. 
Messrs. Sclater and Salvin read a report on the collection of Birds made 
during the voyage of H.M.S. ‘ Challenger.’ The present communication, 
forming the eleventh of the series, contained a description of the Stegano- 
podes and of the Impennes. Of the first group the collection contained 
thirty-three specimens belonging to eight species; of the second, thirty-seven 
specimens belonging to six species. 
Prof. E. Ray Lankester read a paper in which he gave an account of the 
structure of the hearts of Ceratodus, Protopterus, and Chimera, with an 
account of certain undescribed pocket-valves in the conus arteriosus of 
Ceratodus and of Protopterus. 
June 18, 1878.—AnrtTHuR Grotr, Esq,, Vice-President, in the chair. 
The Secretary read extracts from a letter addressed to him by Mr. E. L. 
Layard, containing remarks on two species of New Caledonian birds. 
A second communication from Mr. Layard stated that there was an 
example of the recently-described Woolly Cheetah (Felis lanea) in the 
South African Museum at Cape Town. 
Mr. Edward R. Alston read a paper “‘ On the Squirrels of the Neotropical 
Region,” in which he recognised twelve out of fifty-nine described species, 
