of the Fishery Board for Scotland. 177 



Batliyporeia and Ampelisca have been recorded, but the species were 

 apparently not identified. 



Stenotho'e marina has one or two records, but it appears to have been 

 comparatively rare in the tow-net gatherings under consideration. 



Argissa hamatipes is occasionally recorded in the lists of tow-net 

 invertebrates collected at the three outer stations, but less frequent in 

 those collected at the inner stations. 



Metopa alderi appears to have been comparatively frequent at 

 nearly all the stations. 



Perioculodes longimanus is recorded chiefly from the outer stations. 



Iphimedia obesa is only recorded once — in 1892 for Station V. in 

 January. 



Apherusa (two species) and Paratylus are referred to several times in 

 the lists of tow-net invertebrates ; neither of them appears to be rare, 

 though less common than some of the others. 



Melphidippella macera is only once recorded — viz., at Station VIII. in 

 March 1892. 



Amathilla liomari is also recorded once — viz., for Station IV. in 

 December 1892. 



Gammaropsis erytlirophtlialmus is recorded once — for Station V. in 

 December 1890. 



Dulichia sp. and Pariambus typicus are both rarely mentioned among 

 the lists of tow-net gatherings. 



(/) Cladocera. 



Evadne nordmanni is recorded from nearly all the six stations, and 

 was occasionally moderately frequent. 



Podon (V) polyphemoides, though not so common as Evadne, is re- 

 corded several times, and for at least four different stations. 



(g) Copepoda. 



The Copepoda, though usually present in nearly all the tow-net gather- 

 ings, being sometimes common or even abundant, do not usually show 

 much variety of species. The following is a list of the Copepods 

 recorded in the various tow-net gatherings collected during the seven 

 years at the six selected stations : — 



Calanus finmarchicus (Gunner). Anomalocera patersoni, Tempi. 



Pseudocalanus elongatus, Boeck. Parapontella brevicornis (Lub.). 



Temora longicornis (Miiller). Oithona (?) similis, Claus. 



Centropages hamata, Lillj. Tlialestris longimanus, Claus. 



Gentropages typicus, Kr. Tlialestris serrulatus, Brady. 



Metridia hibernica (B. & R,.). Alteutha dcpressa (Baird). 



Candace pectinata, Brady. Dermatomyzon nigripes (B. and R.), 



Acartia sp. (I Clausii and longi- Monstrilla sp. 



remis). Caligus rapax, Miiller 



