of the Fishery Board for Scotland. 



299 



The mollusks again were still procured in considerable numbers. The 

 majority of the bivalves seemed to be mussels, though larval forms of other 

 species were probably present. The size of these bivalves ranged from 

 •012 to "016 inch in the bottom-net, in which they were present in larger 

 numbers. Larval univalves (Gastropods) were also obtained, though, as a 

 rule, they were not numerous on any occasion. A young Spirialis 

 occasionally appeared amongst them. 



In the surface-net the young univalves were sometimes more abundant 

 than in the bottom-net, but the bivalves seemed to be fewer. The latter 

 varied from "Oil to '017 inch. 



The post-larval fishes in the mid-water net were comparatively rare, and 

 they were procured in the first half of the month, viz., on the 8th and 

 16th. They consisted of young Clupeoids varying from 11*5 to 18 5 mm., 

 the former having no permanent rays in the fins, while the latter presented 

 them. A gurnard 16 mm. long, was the only other form. The smaller 

 gadoids had now for a time passed out of the upper regions of the water, 

 and were either close inshore, or frequented the ground. The only other 

 form was a young pipe-fish (Sygnathus aeus) 2 inches long, obtained off 

 the east rocks by the mid-water net. 



November. 



The surface- and bottom-nets gave many Diatoms, spores of Algae, and 

 fragments of the latter. 



Instead of the numerous and varied representatives of the group so 

 characteristic of the preceding months, the surface-net in November 

 exhibited a very few Pleavobrachice, the place of the ordinary Hydromedusae 

 being taken by Circe, which was in considerable numbers, though none 

 were large. 



In the mid-water net, however, Beroe was represented by numerous 

 large examples, which swam in the deeper parts of the water instead of 

 seeking the surface as in the warm months. Many Pleurobrachice — 

 some well grown — were also captured in this net. 



In the bottom-net only a few examples of the latter (Pleurobracldw) 

 were obtained. 



The surface-net gave a very few small specimens of Tomopteris, while 

 the bottom-net, besides one or two similar specimens, added a few 

 Nematodes. 



Sagitta, again, of considerable size, viz., fully three-fourths of an inch, 

 occurred in all the nets, and often in great numbers. They took the place 

 of the absent Hydromedusae. 



During November opportunities for examining the Bay were few, since 

 the weather was often unsuitable, and hence the data for this month are 

 less numerous. In the surface-net, however, Acartia longiremis was 

 occasionally abundant, along with a few exuviae of Balani. The 

 bottom-net gave the same Copepod. Many specimens of Pseudocalanus 

 elongatus, Hyperia mednsarum, and Mysis flexuosa, while Crangon 

 vulgaris also appeared occasionally. 



The mollusks of November were a few bivalves (apparently mussels) 

 0*16 inch, some larger mussels, and a few minute univalves, both groups 

 occurring only in the bottom tow-net. 



The post-larval fishes had not quite disappeared from the Bay, for a 

 Pleuronectid 11*5 mm., apparently a flounder, was procured in the 

 mid- water net on the 1st, the left eye just appearing over the ridge. On 

 the same date a few Clupeoids 14 '5 to 16 5 mm. were also obtained. 

 The contrast, however, to the preceding months was marked. 



