On the Genus Grammatodon. 47 



lected by the late Mr. G. L. E. AndrcEe, to whom the species 

 has been dedicated. 



Signoiet founds his Monophlebid genus Walheriana upon 

 a single species from Ceylon, W. jloriger of Walker. He 

 has made the generic description so minute and close, including 

 even colour and relative lengths of antennal and crural joints 

 &c., that it is really more suitable for specific use, and would 

 exclude anything but the typical species. I think it advisable 

 to widen the generic characters, to admit what are evidently 

 specifically allied insects. I have at least four other species 

 from Ceylon that I propose to place in this genus. 



EXPLANATION OF PLATE V. 



Fig. 1. Female insect, dorsal view, showino: waxy processes as in life. 



Fig. 2. Ditto after maceration, showing spiniferous tracts. 



Fiff. 3. Antenna. 



Fiff, 4. Pai't of one of the marp:inal spiniferous ti-acts, showing (a) tubular 

 spines, (6) collared hair, (c) glandular pores. 



Fig. 5. Part of skin, showing (a) glandular pores from border of spini- 

 ferous tract, (6) larger pores with circular orihces. 



Fig. 6. Foot. 



Fig. 7. Eye. 



VI. — Note on the Genus Grammatodon, 3feek and Hayden. 

 By H. Woods, M.A. 



The genus Grammatodon was founded by Meek and Hayden 

 on a species of ^^Arca''^ from the Jurassic of the Black Hills. 

 The name, with a reference to the type species, was published 

 in 1860, but no diagnosis of the genus was given until 1864. 

 The type species is Area {CacuUoia) inomata, Meek and 

 Hayden, Proc. Acad. Nat. Sci. Pliilad. 1858, p. 51. 



In their description the authors state that Grammatodon is 

 closely allied to Macrodon^ Lycett. The type of the latter 

 genus [Cucullcea htrsonensis, d'Archiac) differs from most of 

 the other species in having the umbones placed very ante- 

 riorly. Alter comparing Grammatodon with a number of 

 species of Macrodoa, 1 am unable to detect any differences 

 which could be regarded as of generic importance, and I 

 consider that the two forms are identical. 



It was pointed out by Meek and Hayden that the name 

 Macrodon had been previously used by Miiller (1842) for a 

 genus of fishes (Characinidae), and they proposed, to substitute 

 for it Parallelodon ; this name has been adopted by some 



