80 THE ZOOLOGIST. 
first examination he (Dr. Dobson) had inclined to regard it as representative 
of a new genus, Metabdella (see ‘ Nature,’ No. 593). 
Dr. J. D. M‘Donald drew attention to its peculiar anatomical structure 
and natural relationships, still further to be elucidated by him shortly in the 
‘Annals and Magazine of Natural History.’ 
Dr. Cobbold agreed in the high importance of the observations as 
not only verifying previous discoveries, but adding novel structural details. 
He regarded the worm as identical with the Ophiostomum of Rudolphi and 
Willemoes Suhm, with Pterygodermatites of Wed], and with Rietularia 
of Frelich. He further looked upon it as ‘an aberrant member of the 
Ophiostomide, whereas Wedl thought the parasite came nearest to the 
Cheiracanthida. 
Dr. Cobbold exhibited five specimens of Distoma crassum, Bush. He 
stated that the Chinese missionary whose parasites had been brought before 
the Society in 1875 had, on his return to China, again become the victim of 
these large flukes. Not only so, but his wife and daughter were attacked, 
and all of them had been compelled to return to England. 
A paper, ‘On the Classification of the Gasteropoda” (part ii.), was read 
by Dr. J. Dennis M‘Donald. In this communication the author gave 
further data in support of his mode of classification of the group dependent 
on anatomical characters.—J. Murix. 
ZooLoaicaL Society oF Lonpon. 
November 30, 1880.—Dr. Epwarp Hamiuton, Vice-President, in the 
chair. 
Mr. Alfred E. Craven read a paper on a collection of land and fresh- 
water shells from the Transvaal and Orange Free State in South Africa, 
with descriptions of nine new species. 
A second paper by Mr. Alfred E. Craven contained the descriptions of 
three new species of land shells from Cape Colony and Natal. 
Surgeon Francis Day communicated a paper by Prof. A. A. W. Hubrecht, 
which gave an account of a collection of reptiles and amphibians made by 
Dr. C. Duke in Beloochistan. 
A communication was read from Mr. J. H. Gurney, containing a 
description of the immature plumage of Dryotriorchis spectabilis (Schleg.), 
a very scarce raptorial bird from Gaboon, now living in the Society’s 
Gardens. 
A communication was read from Mr. Roland Trimen on an undescribed 
Laniarius, obtained by Dr. B. F. Bradshaw on the Upper Limpopo, or 
Crocodile River, in Southern Africa, which he proposed to name Laniarius 
atrocroceus. 
