On the G^jsophageal Teeth of the Stiomateidie. 249 



head and thorax densely covered with white hair, tinged with 

 ochreous on vertex and scutellum ; tegulao clear testaceous ; 

 wings clear, stigma ferruginous; hind femora and tibiio clear 

 red, with much light fulvous hair; abdomen with very broad 

 felt-like bands. 



Deesa, India, March 1900 {Nurse). 



In Feb. Ib'J'J Col. Nurse collected a male at Deesa which 

 may, I think, be referred liero. It is, of course, smaller 

 (length hardly 11 mm.) and more slender, but it has the 

 same general appearance. Tiie hind femora, however, are 

 dark and their tibiae are strongly int'uscated excej)t apically, 

 while all the tarsi are ferruginous. The flagellum is dusky 

 reddish beneath and the malar space is longer than broad. 

 Tills male is very easily known from C.hi/heiformis, Eversm., 

 by the long mahir space and the total lack of coarse punctures 

 on the exposed parts of abdomen. The face and front are 

 densely covered witii pure white hair, and there is a fringe of 

 very long hair about the ocelli. The hair of the metathorax 

 is pure white, that of the scutellum very faintly yellowisli. 



Specimens of all the new forms described above will be 

 found in the Nurse collection at the British Museum. 



XXVII. — Note on the (Esophageal Teeth of the Stromateida;. 

 By J. D. F. Gilchrist, M.A., D.Sc 



In this family of fishes certain structures, variously described 

 as " teeth," " tooth-like processes," " long barbed teeth," 

 " internal papilhe beset with setiform teeth," &c., are men- 

 tioned as occurring in the oesophagus. The presence of teeth, 

 or structures homologous with teeth, is scarcely to be expected 

 in this region of the alimentary tract, and is therefore of some 

 interest. The fact also that these " teeth " are found in two 

 large saccular outgrowths of the alimentary tract, just behind 

 the branchial region, is suggestive of a pair of closed gill- 

 slits, and is another point worthy of attention. 



These toothed sacs do not seem to have been further 

 investigated or compared in different types, and the examina- 

 tion of species of Pseues, Stromateus, and Nomeus show some 

 noteworthy features and differences. In these, internal 

 papillae — or, rather, lobes — beset with setiform structures were 

 found, and, in one species of Pseues and Stromateus, tooth- 

 like processes with barbs. The last cases present some 



Ann.(h Man. N. Hist. Ser. 9. Vol. ix. 17 



