508 Zoological Society. 
«The granules may possibly be regarded as yolk-globules, in 
which case I apprehend the numerous secondary cysts, or cells, must 
be considered as so many different yolks. 
** On the oval Corpuscles of the Cysticercus. 
“If the opake part near the head of this entozoon be gently 
pressed, a little rather viscid fluid will escape, which on examination 
will be found to be pervaded by a great number of oval corpuscles, 
presenting a very beautiful microscopic object. They have a re- 
markably distinct dark outline, with a brilliant surface, semitrans- 
parent, and apparently homogeneous, except very rarely, when they 
appear to contain an inner corpuscle or cellule. 
«They are generally but slightly oval, their length often scarcely 
exceeding their breadth by a third, as exhibited in the drawing, 
though they may occasionally be seen nearly twice as long as they 
are broad. A common size of the corpuscles is about ;,'5,th of an 
inch long, and z5/,5th broad. 
«The bladder-like body of these hydatids is everywhere pervaded — 
by distinct spherules, presenting a bright oil-like appearance, vary- 
ing in diameter from g5Ag5th to zp 5th of an inch. They have no 
resemblance whatever to the oval corpuscles. 
‘* Hydatids are described as being without discernible generative 
organs. Whether the remarkable oval corpuscles shown in the 
drawing be ova or gemmules, must be determined by future obser- 
vation. ‘That they are the former appears probable, from their form 
and general regularity of size. Besides they are situated in one 
particular part of the parent, never appearing in the walls of the 
transparent sac. If this conjecture should be confirmed, the cysti- 
cercus can no longer be regarded as destitute of any distinct gene- 
rative organ, for the part in which the ova are contained will corre- 
spond to the uterus of the higher entozoa, and probably lead to a 
further knowledge of the method by which the different species of 
this genus are propagated. 
‘«<T am indebted to the kindness of Mr. Siddall for the accompany- 
ing drawings, which have been made by the aid of the camera lucida. 
As they were taken from dried specimens, the internal structure of 
the ova of the Distoma is not well exhibited, though the form is 
faithfully shown.” 
May 26.—William Yarrell, Esq., Vice-President, in the Chair. 
A letter from Hugh Cuming, Esq., was read. ‘This letter is dated 
Manilla, November 5, 1839, and gives an account of some cases of 
specimens forwarded to the Society. Mr. Cuming states that he 
has not yet been successful in procuring a certain Ruminant, known 
by the name Tamaroo, but he entertains hopes of having a specimen 
forwarded to England after him, he being about to return. With 
the exception of this animal, he had procured all the quadrupeds of 
the Philippines of which he could obtain any information. The 
letter, moreover, states that he observed two varieties of the Monkey 
he had sent home (Macacus cynomolgus), and which is the only spe- 
