= 
.) 
fathoms and which in comparison with the specimens of Neomenia hith- 
erto observed, appear to be ofa gigantic size, one measuring 105, the 
other 143 millim. They both belong to the same species, of which 
I gave a very short diagnosis in the „Zoologischen Anzeiger n° 70”, 
dedicating it to the enthusiastic zoologist who has since exchanged 
the arctic regions for the tropies. The excellent state of preserv- 
ation, which after two years immersion in spirit permits of delic- 
ate histological detail being clearly made out, is due to his care- 
ful treatment. 
The method according to which I have made the anatomy of 
these specimens was dietated 1) by the rarity of the specimens, 
2) by the state in which one of them was when it was handed 
over to me. This latter specimen had been slit open from end to 
end along the back in a rough and unmethodical way and though 
this allowed me to study the situation of different parts by ma- 
eroscopic dissection, it seriously interfered with the accurate prepa- 
ration of many others. Those parts of which the minute anatomy 
was required were afterwards decalcified, stained with pierocarmine 
and cut into series of sections, which were all preserved in their 
order of succession and mounted in balsam. 
The second uninjured specimen was not dissected but similar 
series of microscopie sections, made after treatment with MAYkRr’s 
mixture of pierie and hydrochlorie acid (22) and imbedding in 
parrafin were obtained through those portions of the body where 
the first set required further elucidation and controlling. In this 
wav no appreciable part of the specimens has been lost and all 
ihe anatomical facts, hereafter to be mentioned, may at any time 
be verified in the preparations. 
Finally I have to give my special thanks to Dr. SPENGEL, 
Prof. v. GrRAFF and Prof. Ray LANKESTER. All-the preparations 
which have served Prof. v. GRAFF for his paper above mentioned are 
at present in possession of Dr. SpEnGeL. Both gentlemen kindly 
‚and readily agreed with my request to be allowed to compare 
these sections with my own and in consequence | obtained a much 
‚more reliable basis for the comparison of v. GrArr’s account of the 
