234 



Part III. — Twelfth Annual Report 



Delavalia cemula, T. Scott. 

 Dermatomyzon gibberum, T. and A. 



Scott. 

 Hersiliodes littoralis (T. Scott). 

 ** Heteropsyllus curticaudatus, T. Scott. 

 *Laophonte denticornis, T. Scott. 

 ,, depressa, T. Scott. 

 ,, inopinata, T. Scott. 

 ,, littorale, T. and A. Scott. 

 ,, simulans, T. Scott. 

 ** Laophontodes typicus, T. Scott. 

 ** Leptopsyllus typicus, T. Scott. 

 Lichomolgus hirsutipes, T. Scott. 

 Longipedia minor, T. and A. Scott. 

 Neobradya pectinifer, T. Scott. 

 Paramesochra dubia, T. Scott. 



Parartotrogus richardi, T. and A. 

 Scott. 

 ** Pontopolites typicus, T. Scott. 

 * Pseudocyclopia caudata, T. Scott. 



,, crassicornis, T. Scott. 



,j minor, T. Scott. 



** Pseudowestwoodia andrewi, T. Scott. 

 Stenhelia dispar, T. and A. Scott. 

 Stephos minor, T. Scott. 

 Tetragoniceps bradyi, T. Scott. 



„ consimilis, T. Scott. 



,, incertus, T. Scott. 



,, m.acronyx, T. Scott. 



Thalestris forficuloides, T. and A. 

 Scott. 



In the 'Monograph of British Copepoda' 131 species are described and 

 figured exclusive of the fresh- water forms. In list No. I., 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, 

 In List No. II. 10 species are recorded, 

 In List No. III. 8 species (new to Britain) are recorded, 

 In List No. IV. 46 species (new to Science) are recorded, 



95 

 10 



8 

 46 



Total number of species of Copepoda recorded for the Forth, 



including those described in the present Report, . . 159 



fTotal number for the British Islands in 1880, . . . 131 



Excess of Forth species over those for the British Islands 



in 1880, 28 



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, Acartia 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. 

 t This number is taken from the Index at the end of vol. iii. of the 'Monograph 

 ' of British Copepoda. ' 



