16 Part III. — Tirentieth Annual Report. 



The size and age at maturity of the species mentioned were 

 determined, the flat-fishes, in relation to their size, reaching 

 maturity at a later age than the round fishes, and the males 

 becoming mature earlier than the females. The paper is illustrated 

 by a series of plates. 



The Invertebrate Fauna. 



The collections of Crustacea made in connection with the fishery 

 investigations carried on during the past year have in a number 

 of instances proved to be of considerable interest, and are 

 described in a paper by Mr T. Scott. Several apparently un- 

 described species have been obtained in these collections, while 

 others though recorded elsewhere have not previously been 

 obtained in Scottish waters. The number of the former recorded 

 in this paper is ten, and it has been found necessary to institute 

 new genera for five of them, all belonging to the Copepoda. Two 

 rare parasitic forms are described — one parasitic on an Amphipod 

 crustacean and the other on a starfish. 



Mr F. G. Pearcey also contributes a paper on the echinoderms 

 of the Moray Firth, with Tables showing their distribution at 

 various parts of the area. 



We have the honour to be. 



Your Lordship's most obedient servants, 



ANGUS SUTHEKLAND, Chairman. 



D, CRAWFOKD, BepuUj ■Chairman. 



D'AECY W. THOMPSON. 



J. EITCHIE WELCH. 



W. R. DUGUID. 



L. MILLOY. 



D. MEARNS. 



WM. C. ROBERTSON, Secretary. 



