98 SEVENTH REPORT—1837. 
On the Metamorphism of a Species of Crustacean, allied to Palamon. 
By Captain Ducanr, R.N. 
The remarks and observations of Captain Ducane tended to confirm 
Mr. V. Thompson’s discovery, published some years since, of the ex- 
istence of metamorphosis in this class of animals. (Captain Ducane 
was tequested by the Committee to continue and extend his observa- 
tions.) 
On the Sclerotie Bones forming the Orbit of the Eye in different Birds 
and Reptiles. By 'T. Auuis. 
This paper, which requires illustrations by drawings, will be printed 
entire in the Transactions of the Yorkshire Philosophical Society, in 
whose Museum Mr. Allis’s collection is preserved. 
Notice of Argas Persicus, a species of Bug, found in Mianneh, in Per- 
sia, and reported to be poisonous. By Dr. TRAILL. 
On the Production of Cataract by a Worm. By Professor OwEN» 
Communicated by the Rev. F. W. Horr. 
On Limax Variegatus in the Human Intestines. By Dr. Davin 
WILLIAMS. 
The author gave a statement of a young woman who had voided a 
large slug, after having suffered great pain. The slug, which was ex- 
hibited, appeared to be Limazx variegatus. It was dead when voided, 
but quite unaltered. 
Dr. Billingham gave a corrected description of Trichocephalus dispar, 
noticed the discrepancy of opinion between English and continental 
observers as to the frequency of its occurrence in the intestines of man, 
and recorded the result of his own examination of twenty-eight indivi- 
duals who died during the last twelve months, in St. Vincent’s Hospital, 
Dublin ; eleven of whom were males, and seventeen females, of various 
ages, from 8 years to ’70. The worms were found in the large intes- 
tines of twenty-five of these subjects, in a greater or less number, from 
2or3to119. The three individuals whose intestines contained no 
worms were females, and had been taking certain metallic medicines, 
which may be supposed to be capable of destroying intestinal worms. 
Nothing felt by the individuals during life indicated the presence of 
worms in the intestines. 
