ME. WRIGHT ON TEETH OF THE BALLAN WRASSE. 873 



PLATE XIV. 



Fig. i . Cj'pris ornata, female, seen from left side, x 40, 



Fig. 2. ,, ,, ,, from above, x 40. 



Fig, 3. ,, ,, post-abdominal ramus, x 84. 



Fig. 4. Potamocypris fulva, lower antenna, x 210. 



Fig. 5. Xiphichilus tenuissima, female, upper antenna, x 210. 



Fig. 6. ,, ,, lower antenna, x 210. 



Fig. 7. ,, ,) mandible, x 210. 



Fig. 8. „ „ first maxilla, (?) X 210. 



Fig. 9, „ ,, last foot, x 210. 



Fig. 10. ,, ,, abdomen, x 210. 



XXI. — On the Teeth of the Ballan Wrasse (Labrus macalatas), 

 By Joseph Wright, (Plate XV.) 



Having lately had an opportunity of examining the teeth of the 

 Ballan Wrasse (Labrus ?naculatus), and finding them to be in- 

 teresting examples of tipped teeth, similar to those of some of 

 the fossil fish of our Coal-Measures, I venture to lay before the 

 Club the result of my observations. 



About two years ago, in a paper read before one of the scien- 

 tific societies of the metropolis, on the teeth of some fossil fishes, 

 this peculiar structure was pointed out as new, and was consi- 

 dered of such importance that a new genus was based on it. 

 Yet, notwithstanding this statement, the same structure had 

 been described nearly thirty years before by Agassiz, in his 

 great work on the fossil fishes, and was shown by him to exist 

 in Pygopterus and Saurichthys, and also in the recent genera 

 Polypterus and Lepidosteus. In the last part of the Transac- 

 tions of this Club, the same structure is described as being found 

 in the teeth of Gyrolepis, Amblypterus, Pygopteris, and Cyclop- 

 tychius : Mr. Atthey also informs me that he has found the same 

 structure in Acrolepis, which he has obtained from the Marl 

 Slate. But we need not be astonished that the author of the 

 paper referred to had not seen this structure in the fossil fishes 



