260 
Mr. Dancer exhibited a number of Slides of various new 
and interesting objects. 
June 20th, 1860. 
The Secretary read a few extracts from a private letter 
from Mr. Frembly, of Gibraltar, in which he refers to the 
rotifera found in that neighbourhood : they vary very little 
from the British species described by Carpenter, Henfrey, &c. 
He found with them, free vorticella with spiral stalk or tail, 
whilst in England the free vorticella is generally found with- 
out tail. Its utility in the case of those living with such 
neighbours is manifest, for the vorticella would now and again 
become involved in the eddy made by the cilia of the rotifera, 
but invariably before coming in contact did they succeed in 
escaping by the muscular power of the tail, which by suddenly 
coiling enabled them to throw themselves out of the influence 
of the current. 
Mr. Frembly had found one of the Algae of the chlorosperma 
order, which was new to him, and of which he had not found any 
description. He intends to send specimens for examination. 
A letter was read from Mr. Hep worth, of Crofts Bank, 
accompanying specimens of Sarcina, injected kidney, spores of 
Equisetum, Euglina, Batrachospermum monaliformis of two 
kinds, some diatoms, &c. 
Mr. Samuel Hardman, of Davyhulme, presented a few 
well mounted specimens of larva, wire-worm, willow cotton, 
cimex, and curculia. 
Mr. Mosley exhibited the living (so-called) skeleton 
larva and pupa of the corethra plumicornis (Pritchard), pupa of 
Ephemera, marine gammarus from Gibraltar, and aquatic 
