320 Prof. D. M. S. Watson on 



along the costal region ; Sc long, cell \st M.2 relatively 

 small, tending to be open by the atrophy of m ; cell M^ 

 lacking. 



Male. — Length 12 ram. ; wing 11 mm. 



Female. — Length 20 mm. ; wing 15 mm. 



Rostrum and palpi brownish black. Antennae short in 

 both sexes, black. Head brownish black, paler adjoining 

 the inner margin of the eyes. 



Thorax brownish black, sparsely dusted with brown. 

 Ilalteres and legs brownish black. Wings with a strong 

 brown tinge, the costal region more saturated, this intense 

 coloration including the costal and subcostal cells and the 

 radial region to the wing-apex; veins dark brown. A^eua- 

 tion : Sc very long, ;S'Ci ending approximately opposite ?•, 

 Sc2 some distance from the tip of Sc-^, the latter alone being 

 about equal to the deflection of /?4_,_5 ; Rs elongate, arcuated 

 at origin; cell \st M2 open or closed, tn tending to be 

 evanescent; veins beyond cell Isl ^Ifj very long and parallel; 

 cell Ml lacking; l)asil deflection of Cui beyond the fork 

 of M ; Cmj and the basal deflection of C'ui subequal. 



Abdomen black with a brown pollen. Abdomen of 

 female relatively elongate; valves of ovipositor elongate, 

 acicular, black, the apices of tergal valves horn-coloured. 



Hub. Caraeroun. 



Holotype, (^ , Metet, 200 miles inland, east of Batanga, 

 June 20, 1918 (A. I. Good). 



AUotopotype, ? , in ccpula with type. 



Carnegie Museum, Accession No. 6317. 



Type in the collection of the Carnegie Museum. 



XXIX.— Ou tlie CceJacanth Fish. 

 By D. M. S. Watson, University College, London. 



FOH some years I have been interested in Coelacanth fish, 

 because, although commonly included with the Osteolepids, 

 they differ from those forms in many respects, and have in 

 s me ways marked resemblances to the Teleosts. I therefore 



investigated the structure of Macropouia in specimens partly 

 of my own, partly lent me by Mr. G. E. Dibley, F.G.S. 

 Whilst I was actually writing this paper I received from 

 Dr. E. A. Stensio a copy of his great work on the ' Triassic 

 Fishes from Spitzbergen' (Viennaj AdoU Holzhausen, 1921), 



