206 dr. (!. s. brady ox the [Feb, 1, 



given by Fischer, though incomplete and otherwise not very 

 satisfactory, are not, at any rate, contradictory, and G. W. Miiller 

 agrees with Dr. Norman and myself in our conclusion. I here 

 give drawings of some of the more important diagnostic details — 

 the shell only having hitherto been figured from British spe- 

 cimens. The figures are from a specimen taken at Hairmyres, 

 near Glasgow, by tbe late Dr. D. Robertson. 



C.fabaformis, though not by any means a common species, is 

 pretty widely distributed in England, Wales, and Scotland. 



Candona hyalina Brady & Robertson. (Plate XXY. figs. 1-5.) 



1870. Candona hyalina B. k R., (8) p. 18, pi. v. figs. 4-11, 

 pi. ix. figs. 5-8. 



1889. Candona hyalina Brady & Norman, (2) p. 247. 



1900. „ „ G. W. Miiller, (5) p. 33, pi. viii. 



figs. 14-21. 



Shell of the female (fig. 1) seen laterally, oblong, subreniform, 

 greatest height situated behind the middle and equal to about 

 half the length ; anterior extremity rather obtusely rounded, 

 somewhat wider than the posterior, which is however more fully 

 rounded off; dorsal margin well arched, ventral very slightly 

 sinuated in the middle : seen dorsally (fig. 2) the outline is much 

 compressed, elongated, with acutely pointed, nearly eqxial extre- 

 mities, the lateral margins evenly curved, greatest width in the 

 middle and equal to one-third of the length. Shell thin and semi- 

 transparent; surface smooth, free from hairs. Length 1*35 mm. 



Anterior antennae slender, the last three joints bearing long 

 apical setae ; posterior antennae stout, sparingly setiferous ; last 

 joint of the last pair of feet bearing three long setae. Caudal rami 

 (fig. 5) armed with two moderately strong claws of nearly equal 

 length, seta of the dorsal margin as long as the terminal claws 

 and arising a little behind the middle of the limb. Grasping 

 portion of the second maxilla of the male not very dissimilar on 

 the two sides, with chisel-like extremities ; that of the right side 

 rather larger and stouter than the left (figs. 3, 4). 



I have seen but one male specimen of C. hyalina — already im- 

 perfectly figured in previous papers, the dissection having been 

 a »ood deal distorted and otherwise injured in preparation. 

 Dr. Thomas Scott, however, records the male as having been taken 

 in Threipmuir reservoir near Balerno, and the female in several 

 Scottish localities. The type specimens are from Bartcn Broad 

 and other parts of the English Fen-district. I have recently 

 received from Mr. Robert Gurney some which were taken at 

 Sutton in Norfolk. The species has very probably been often 

 recorded as C. faboeformis. In my own collection are specimens 

 which have been erroneously so called. 



Candona brevis G. W. Miiller. (Plate XXV. figs. 6-12.) 



1900. Candona brevis G. W. Miiller, (5) p. 20, pi. iv. figs. 5, 20, 

 pi. v. figs. 26 -30. 



