of the Fishery Board for Scotland. 231 



over the surface of the skin, each spot having in its centre an opening of 

 a mucous canal. In the old shark the skin has more of a blue tint, and 

 the white spots are absent. Mucous canals open nevertheless in great 

 numbers, particularly in the region of the head, where they are arranged 

 in rows. 



DESCRIPTION OF PLATE X. 



Reproductive organs of young shark — oesophagus cut through, and cloaca slit 

 up, so as to show the two compartments, the openings of the oviducts, and 

 the common urinary opening at the summit of the papilla. 



APPENDIX F.— No. XVII. 



LIST of the MARINE FAUNA collected at the Tarbert Laboratory 

 during 1885. Part 1. By George Brook and Thomas Scott. 



The present list does not pretend to include a com[)lete list of the 

 forms known to inhabit Lochfyne and the adjacent waters, but simply 

 includes those species which have been collected and identified in 

 connection with the enquiries at present in progress in Lochfyne under 

 the direction of the Fishery Board. 



The large group of Amphipods have not been included in the present 

 list of Crustacea, as many species have not yet been identified. Other 

 groups, such as the Coelenterates, Sponges, Annelids. Tunicates, &c,, 

 have not received special attention, and will be worked up later. 



Our thanks are due to the Rev. A. M. Norman for the very valuable 

 assistance he has rendered us in the identification of the Crustacea, who 

 co'ntributes a paper on some of the more interesting forms. 



In order to add to the value of the present list, an asterisk has been 

 placed in front of each species which is known to form a part of the food 

 of fishes. 



