PROGRESS OF MICROSCOPICAL SCIENCE. 
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shown to be oviducts by Hancock and Huxley, and till something at 
least could be given of the embryology of some brackiopod. For 
these two matters he has visited Eastport, Maine, for the third time, 
and now his heretofore fruitless endeavours have met with success. 
He had before seen the ciliary lining of the oviducts in Lingula 
and Terebratulina, but be wished to see the eggs in their actual 
passage through the tubes. This he has now repeatedly observed in 
Terebratulina. The eggs were soon discharged from the sinuses in 
the pallial membrane, afterwards floating freely in the perivisceral 
cavity ; the eggs were then seen gathered at the trumpet-shaped mouth 
of the oviduct, and have been watched as they were slowly passing 
through the tube, and have been caught as they were discharged at 
the external orifice. These eggs have then been followed in their 
development until they assumed the form of a deeply-annulated 
embryo, composed of four distinct rings, which had a marked vermian 
contraction upon each other. At this stage they appeared to be 
attaching themselves by the caudal segment. During the latter part of 
this examination his embryos were unfortunately lost. He had not 
the necessary appliances to keep the water at the frigid temperature 
they were accustomed to, and the increased temperature of the water 
led to a rapid development of Paramiecia, and other infusoria, and his 
embryos were ruthlessly eaten up. He has, however, nearly three 
hundred outlines of the embryos dining their development. Next 
year it is hoped a complete history of their development will be 
made, as many things have been observed in their proper management 
of which he hopes to profit in his next attempt. There were also 
discovered prominent glands at the external openings of the oviducts 
in Terebratulina, which he has every reason to believe represent the 
testes. These glands surrounded the external orifice of the oviducts, 
which protruded somewhat from the anterior walls of the body, and 
the glands were invariably found filled with spermatozoa. From East- 
port, Maine, he hurried to the St. Lawrence, with the hopes of securing 
some data regarding the embryology or early stages of another 
brachiopod found there, Rhynchonella psitfacea. He was altogether too 
late for this, but had the opportunity of studying Rhynchonella alive, 
to note the ciliary action in the oviducts driving currents outward, and 
to establish the correctness of Owen’s supposition that the arms of 
Rhynchonella can be protruded. A jar of specimens dredged by Dr. 
P. P. Carpenter, who had accompanied him from Montreal, was left 
standing undisturbed for twenty-four hours, when one of the specimens 
protruded its arms their entire length from the partially opened shells. 
He poured the sea water carefully out, and suddenly poured in the 
strongest alcohol, and the specimen is now preserved in this exerted 
position. In a forthcoming memoir of the Boston Society of Natural 
History all the details of these examinations will be given. 
Some New Species of Graptolites have been described by Mr. John 
Hopkinson, F.R.M.S., in the ‘Geological Magazine’ for November, 
1872. The subject may interest some of our Fellows, but the paper is 
impossible to abstract in any reasonable space. 
