Sjjccics of Sessih-cyed Crustaceans. 79 



evidence can scarcely be needed ; but it will do no harm to 

 place on record the capture of a fine specimen of Tanais vit^ 

 tatus with eggs as described by Rathke. It was taken in 

 August 1875 from the shore-piles on the North Sands at 

 Salcombe, in which, as in similar piles at Torquay, this 

 species abounds along with Chelura terebrans and Limnoria 

 lignorum. 



Apseudes LatreilUi^ Bate and Westwood. 



This species, hitherto recorded only from the North, was 

 dredged this summer at Salcombe. The antennae bear a very 

 close resemblance to those of Apseudes talpa, a fact which 

 could scarcely be guessed from the figures of the two species 

 in the ' British Sessile-eyed Crustacea.' There is, however, 

 apparently no crenulation in the large basal joint of the upper 

 antennae, though it has the uneven outline and setse noticeable 

 in the other species. 



Joira albifrons, Leach. PL V. figs. 5, da, 5 b, 6, 6 a, 7. 



The generic character of Jrera in the * British Sessile-eyed 

 Crustacea ' states that " the pleopoda or branchial appendages " 

 are " covered by a large plate occupying the entire under 

 surface of the pleon." In the remarks which follow, however, 

 it is explained that this plate (or " grande lame operculaire," 

 as Milne-Edwards has called it) is a sexual distinction peculiar 

 to the females. It is necessary to bear this in mind in order 

 to infer, what is not otherwise indicated, that the Joera albi- 

 frons figured and described in the work referred to is a female 

 form, while the Jwra Nordmanni of the same work is a male. 

 One might easily jumjD to the conclusion that they were the 

 sexes of a single species ; nevertheless such a leap in the dark 

 would land us in a mistake. On all the shores near Torquay 

 Jrera alhifrons is very common, and, at least in one spot (on 

 Meadfoot Beach), Jcera Nordmanni is, or till lately was, also 

 abundant. But though in close propinquity, the two species 

 were not mixed, Joira Nordmanni occupying a higher zone of 

 the beach than its congener. Messrs. Bate and Westwood 

 give the same length for each of the species, namely " about 

 one sixth of an inch." This is probably an oversight or a 

 printer's error, since, though the figure of J. Nordmanni hap- 

 pens to be a larger one than that of /. albifrons, in the lines 

 which indicate the natural sizes these dimensions are reversed. 

 As a matter of fact no members of the Meadfoot colony of J. 

 Nordmanni appeared to attain fully even an eighth of an inch 



