76 Eev. T. R. E. Stebbing on some 



Kroyera arenaria, Spence Bate. PI. IV. fig. 3. 



The genus Kroyera was separated from Monoculodes of 

 Stimpson only on the ground that the animals belonging to it 

 have the eyes apart and the second pair of gnathopoda chelate. 

 It so happened that, while the 'British Sessile-eyed Crustacea ' 

 was passing through the press, the authors became acquainted 

 with a new species on all accounts demanding admittance into 

 the genus, except from its having the eyes confluent. The 

 separateness of the eyes can no longer, therefore, be reckoned 

 among the characters of the genus ; and the genus itself might 

 well be cancelled, and the species assigned to Monoculodes. 

 As far as the confluence of the eyes is concerned, it is not only 

 Kroyera altamarina that possesses this Cyclops-like appear- 

 ance ; it belongs also to the species Kroyera arenaria^ on which 

 the genus was founded. At least, if specimens taken in South 

 Devon may be trusted, the eyes, which are situated on the 

 projection of the head, meet in the centre, being distinct, indeed, 

 from one another, but closely united ; they are magenta in 

 colour, prettily picked out by white facets. The boundaries 

 are determined by two concentric curves across the head, 

 and at the sides by the shape of the projection of the head, 

 the lines of which they follow. The white median line 

 which divides and unites the two organs pursues a straight 

 course. 



It will often be in vain to seek for the eyes in specimens 

 that have been long dead ; the pigment invariably loses its 

 colour, and generally becomes dispersed or invisible. As 

 the specimens described by Messrs. Bate and Westwood 

 appear to have reached them from a distance, it is probable 

 that the eyes were not in a condition to admit of accurate 

 description. 



Lilljehorgia Normanni. PI. IV. fig. 4. 



This species was described in the 'Annals ' for July 1874, 

 from specimens taken at Salcombe. In those specimens the last 

 pair of pleopoda were wanting; and as the closely allied species 

 Lilljehorgia slietlandica (B, & W.) was described by Messrs. 

 Bate and Westwood from specimens in a similar predicament, 

 the present opportunity is taken of giving an account of these 

 organs as seen in the female of Lilljehorgia Normanni. There 

 is not likely to be much difference between the two species in 

 this respect. The stem of the pleopoda in question is stout, 

 widening towards the distal end, and projecting as far as the 



