48 THOMAS HENRY HUXLEY 



March 23, 1859. Sci. Mem., ii, ix, p. 157). — Two 

 bones, belonging respectively to a large species of pen-, 

 guin and a porpoise-like Cetacean are described in this 

 paper. 



6. " On the Dermal Armour of Crocodilus Hast-. 

 ingsiae" (op. cit., xv, 1859, pp. 678-80. Read March 

 2 3» I %59- Sci. Mem., ii, x, p. 166). — Here an account 

 is given of the bony scutes belonging to an extinct 

 crocodile. 



7. "On the Anatomy and Affinities of the Genus 

 Pterygotus" (Mems. Geol. Survey U.K., Monograph I, 

 1859, pp. 1-36. Sci. Mem., ii, xi, p. 170). — This 

 important monograph describes in detail the structure 

 of a typical genus of an ancient extinct group, perhaps 

 most nearly represented at the present day by the king- 

 crabs. The conclusion is reached that the group may 

 be regarded as an order of the Crustacea, an opinion 

 which more recent research has to some extent modified. 

 The relation to the extinct trilobites is also pointed out. 



8. " On Dasyceps Bucklandi (Labyrinthodon Buck- 

 landi, Lloyd)" (op. cit., 1859, pp. 52-6. Sci. Mem., ii, 

 xiii, p. 263). — The memoir describes the skull of one 

 of those extinct armoured Amphibians which were 

 dominant until their supremacy of the land was usurped 

 by Reptiles. 



9. " On a Fragment of a Lower Jaw of a Large 

 Labyrinthodont from Cubbington" (op. cit., 1859, pp. 

 56-7. Sci. Mem., ii, xvi, p. 269). — This paper has 

 reference to another Amphibian belonging to the group 

 just mentioned. 



10. " Observations on the Development of Some Parts 

 of the Skeleton of Fishes" (Q. J. Micros. Sci., vii, 

 1859, pp. 33"4 6 - Sci - Mem., ii, xv, p. 271).— The 

 greater part of this particularly interesting memoir deals 



