of the Fishery Board for Scotland. 



277 



Other Forms. 



Several Polyzoa. 

 2 Aidolyti. 



Numerous examples of Portunus holsatus. 

 1 Corystes cassivelaunus. 

 1 Crangon vulgaris. 



Very many examples of Mysis fiexuosa (young). 

 Very many examples of Diastylis Rathhii. 

 A few examples of Nicea Lubbockiana. 

 A few examples of Atylus Sivammerdamii. 

 A few sand-stars. 



1 Ampliidotus. 



2 examples of Pleurobrachia. 

 Various hydroid zoophytes. 



At the beginning of June Rhizosoleniez were very abundant, but they 

 gradually diminished as the month progressed. A few were generally 

 present in the various nets, but their numbers were insignificant in contrast 

 with the previous month. 



The peculiar gelatinous algoid was procured on various occasions, in 

 considerable abundance, and extended some miles up the Eden. 



Diatoms were abundant, some of them growing on the valves of the 

 Cypris-$t&ge of Cirripedes. Various spores of Algae also were plentiful. 



Amongst the Infusoria were Tintinnus dentieulatus and Ceratium fusus, 

 C. divergens, C. tripos, and Peridinium. All were found in the bottom 

 tow-nets. 



A feature of considerable interest this year was the comparative scarcity 

 of Ccelenterates in the surface-net in June. No entry indeed is recorded, 

 and this agreed with the observations made from the shore as well as at 

 sea. It is rare that so few Medusae and Hydromedusse are seen, a fact 

 perhaps in connection with the low temperature so characteristic of the 

 month. Only on one occasion were a few examples of Gyanea, 6 to 7 in. 

 in diameter, thrown on the west sands by the tide. In former years not 

 only did they abound in the Bay (and towards the surface) in June, but 

 far out at sea they were cajotured by the surface-net in great profusion. 

 It would appear, therefore, that warm, sunny weather is connected with 

 the presence of these and other marine forms at the surface. Our waters 

 differed from the southern, as at Sheerness-on-Sea, during this month, 

 chiefly in the absence of Nodiluca, which were plentiful in the latter near 

 the surface. 



While the surface-waters were thus comparatively barren of Ccelenterates, 

 the mid-water net, on the other hand, demonstrated their great abundance 

 in the deeper regions. In no group was this more marked than in the 

 Hydromedusae, which were seldom absent from any haul. 



Thus Thaumantias pilosella occurred in swarms almost every day, 

 and considerably larger as a rule than during the previous month, though 

 not quite mature. The same may be said of Thaumantias melanops, except 

 that one (about -f s inch) had fully developed ova on the 13th June. A few 

 examples of a form referable to T. pileata were obtained at the beginning 

 of the month. T. hemisphairica of Gronovius, so long known to marine 

 zoologists, was perhaps the most conspicuous of the group both in regard 

 to size and numbers ; and it is often stranded on the west sands in great 

 profusion, and nearly an inch in diameter. Moreover, it had an additional 

 interest, since it is very frequently selected by the larval Peachice for 

 attachment by the widely open mouth and tentacles. The young anemomes 

 (Plate V. fig. 5) are thus carried about by the Medusae without effort on 



