44 



DISCOVERY REPORTS 



Table XIV. Analysis of larvae with seven terminal spines 

 on the telson from St. 374 



The letters a-j\n columns 5-7 afford reference to the nine larvae (Fig. 8), which were arranged according 



to increasing development of their appendages. 



Note I. The two specimens measuring 5-71 and 5-88 mm. respectively will definitely have a five-spined 

 telson in the succeeding stage, although they are of small size and have the less developed appen- 

 dages generally found in larvae which will again moult into a seven-spined form. 



Note 2. Into the outermost left-hand terminal spine of the telson there projects a very thin filament, whilst 

 the corresponding spine on the right side has projecting into its interior a definite process similar to 

 those found within the remaining spines. 



Note 3. There will be six well-developed spines in the next stage, the projection into the outermost right- 

 hand spine being completely absent. 



Note 4. Within the integument of the telson there are definite projections into five of the terminal spines. 

 The outermost spines on each side have tiny processes projecting into them. The latter would 

 probably atrophy and the succeeding stage would almost certainly be five-spined. 



Note 5. The outermost spines have processes projecting into them which are almost as well defined as the 

 others, but preparation for the following stage has not gone far enough to say whether the succeeding 

 stage will be seven- or five-spined. 



Note 6. The formation of seven spines is indicated within the integument of the existing terminal spines, 

 but the outermost on each side is much less robust than the remaining five and would possibly have 

 degenerated before the larva moulted. 



