234 | Part I1]—Twelfth Annual Report 
Delavalia emula, T. Scott. Parartotrogus vichardi, T. and A, 
Dermatomyzon gibberum, T. and A. Scott. 
Scott. ** Pontopolites typicus, T. Scott. 
Hersiliodes littoralis (T. Scott). * Pseudocyclopta caudata, T. Scott. 
** Heteropsyllus curticaudatus, T. Scott. a crassicornes, T. Scott. 
*Laophonte denticornis, T. Scott. minor, T. Scott. 
* ie depressa, T. Scott. ** Pseudowestwoodia andrewt, T. Scott. 
a inopinata, T. Scott. Stenhelia dispar, T. and A. Scott. 
i littorale, T. and A. Scott. Stephos minor, T. Scott. 
. st simulans, T. Scott. , Lebragoniceps bradyi, T. Scott. 
** Laophontodes typicus, T. Scott. is consimilis, T. Scott. 
** Leptopsylius typicus, T. Scott. 5 incertus, T. Scott. 
Lichomolgus hirsutipes, T. Scott. macronyx, T. Scott. 
Longipedia minor, T. and A. Scott. Thalestris forficuloides, T. and A. 
Neobradya pectinifer, T. Scott. Scott. 
Paramesochra dubia, T. Scott. 
In the ‘ Monograph of British Copepoda’ 131 species are described and 
figured exclusive of the fresh-water forms. In list No. L., given above, 
95 of these are recorded for the Firth of Forth, or nearly 72 per cent. of 
the total number of species, exclusive of the fresh-water forms recorded 
for the British Islands in 1880. It will be observed from these state- 
ments that 36 of the marine species described in the ‘Monograph of 
British Copepoda’ have not, so far, been recorded for the Forth area. On 
the other hand, a considerable number of species have been discovered 
in the Firth of Forth, in addition to those described in the Monograph 
referred to, and the majority of these have been recorded for the first time 
for the British Islands, either as species that have been described by 
European and other writers, or as species new to science, as shown by the 
following summary of the four preceding Lists :— 
In List No. I. 95 species are recorded for the Forth, . 95 
In List No. II. 10 species are recorded, 4 10 
In List No. II]. 8 species (new to Britain) at are recorded, 8 
In List No. IV. 46 species (new to Science) are recorded, 46 
Total number of species of Copepoda recorded for the Forth, 
including those described in the present Report, . ) low 
7+Total number for the British Islands in 1880, . 4 mse | 
Excess of Forth species over those for the British Islands 
in 1880, ewe 
A few of the species included in this enumeration of the Copepoda of 
the Firth of Forth are probably somewhat doubtful, and may ultimately 
be set aside, as, for example, Acarteva bifilosus, Giesbrecht, and Oithona 
setiger, Dana; but making all due allowance for such doubtful species, it 
will, I think, be acknowleged that, even in the department of Marine 
Natural History, a fairly successful endeavour has been made to take full 
advantage of the great and almost unique opportunities enjoyed for the 
prosecution of such studies. 
I will now proceed to describe the various species of Invertebrates that 
have been discovered in the Firth of Forth since the publication of the 
Eleventh Annual Report of the Fishery Board for Scotland ; and the 
Copepoda will be taken first in order. 
* New species described for the first time in this Report. 
** New genus and species described for the first time in this Report. 
+ This number is taken from the Index at the end of vol. iii. of the ‘Monograph 
‘of British Copepoda.’ 
