460 MR, E. T. BROWNE ON [Mar. 17, 
LrpTomEDvs. 
Thau mantias hemispherica, p. 480. Phialidium temporarium, p. 489. 
Laodice cruciata, p. 482. Phialidium cymbaloideum, p, 491, 
Euchilota pilosella. p, 484. Eutima insignis, p. 492. 
Epenthesis cymbaloidea, p. 487. Saphenia mirabilis, p. 493. 
Phialidium variabile, p. 487. Octorchis gegenbauri, p. 494, 
Phialidium buskianum, p. 488. 
TRACHOMEDUSE, 
Liriantha appendiculata, p. 495. 
NARcOMEDUSE. 
Solmaris, sp. ?, p. 496. 
INTRODUCTION. 
These notes refer chiefly to Meduse taken at Plymouth during 
September 1893, and from the middle of August to the end of 
September 1895, and also during April and May 1895, in Valencia 
Harbour, on the West Coast of Ireland. ar 
I published, last year, a few notes on the Meduse taken at Port 
Erin, Isle of Man, and have avoided in this paper, so far as possible, 
a repetition of those notes, but have revised the nomenclature in a 
few cases. Ihave not yet made sufficient progress with the study 
of our Meduse to justify the publication of anything more than 
a few selected notes on the species which are best known to me. 
The double system of classification, with one name for the 
hydroid and another for the medusa, I no longer intend to use. 
In cases where the hydroid form of the medusa is known I have 
used both the generic and specific names of the hydroids, without 
any alteration ; but in cases where the medusa only is known I 
have given the generic names as used by Haeckel in his monograph, 
but not always his specific names. It is my intention to transfer 
these medusz to their hydroid names as soon as the hydroid forms 
are discovered. 
In some instances the free-swimming medusa has been described 
before the hydroid form was known, but I do not feel justified 
in changing the specific names of the hydroids, which are now 
so well known, as it would lead to a considerable amount of 
confusion. 
The introduction of formaldehyde as a preserving fluid instead 
of alcohol is of great importance to the marine naturalist, especially 
when working in localities where it is difficult to obtain a supply 
of good spirit. I first tried formaldehyde for preserving marine 
animals at Valencia last year. The results both for hydroids and 
medusx were far superior to those obtained by means of alcohol. 
The colour, however, is not permanently preserved. Specimens 
preserved in formaldehyde, even when killed with the usual re- 
agents, are practically useless for histological work, The best 
