48 ; ' ENDEAVOUR " SCIENTIFIC RESULTS. 



extremity broad, rounded below and truncately rounded to 

 the back. Dorsal line slightly sinuous, concave in the 

 middle. Ventral border straight. Posterior extremity 

 obliquely truncated below, bearing off to a blunt point at 

 the dorsal angle. Beak well developed over the median area, 

 with a broad, blunt termination. Surface of valve round the 

 anterior border depressed and flange-like, the posterior 

 extremity being similarly depressed. Surface smooth, except 

 for some faint pitting.s in the rostral area, and faint lineations 

 on the terminal part of the beak and on the dorsal area 

 parallel with the hinge margin. 



Dimensions. Length .8 mm., height .365mm. 



Affinities. So far as I am aware there appears to be no 

 species of the genus which closely approaches the above 

 form. The nearest that might be cited is C. wellingtoniense, 

 G. S. Brady 1 , but this differs in the suboval form of the valve 

 in side view, and in the absence of a marked depression 

 at the extremities. C. wellingtoniense, moreover, has a 

 narrow anterior extremity as compared with the broadly 

 expanded form of C. dannevigi. 



Named in honour of Mr. H. C. Dannevig, Director of 

 Fisheries, under whose auspices these soundings were col- 

 lected. 



Station 36, east of Tasmania, 777 fathoms. One left valve. 



CYTHEROPTERON FIMBRIATUM, sp. nov. 

 (Plate iii.. figs. 3a-6.) 



Description.- Seen from the side, shell elongate ovate, 

 narrow at the anterior extremity, acuminate posteriorly. 

 The dorsal margin is evenly and strongly convex ; ventral 

 margin sinuous and concave. Beak prominent, somewhat 

 arched and produced into a sharp point, the margin beneath 

 bearing a short fringe of sharp spines. Surface of shell finely 

 punctate. 



Dimensions. Length .54 mm., height .327 mm. 



Affinities. This species is related both to C. antarcticum, 

 Chapman 2 , and to C. abyssorum, var. wilesensis. From 

 C. antarcticum it differs in the inflation of the median area 

 of the shell, in its punctate surface, and in the fimbriate 



1. Brady Rep. Chall. Zool., vol. i., pt. iii., 1880, p. 136, pi. xxxiv., 



figS. 4A-D. 



2. Chapman Rep. on Ostracoda from a Raised Beach above the Dry- 

 galski Glacier, South-east of Mount Larsen. (Now in the press.) 



