65 



The species has been referred by Canu and also by Th. Scott to the genus Eu- 

 pelte of Glaus; but in this view I cannot by any means agree, since Glaus ex- 

 pressly states that in this genus the inner ramus of the 1st pair of legs consists 

 of only 2 joints. It is true that the present species differs somewhat from A, inter- 

 rtt/>ta in the structure of the anterior antennae and posterior maxillipeds; but in 

 all other respects it exhibits so great a resemblance to that species, that it can 

 hardly be separated generically. 



Occurrence. This form is not nearly so common as A. interrupt. I 

 have, however, taken it occasionally in several places off the west coast of Nor- 

 way, as also in the Trondhjem Fjord. It occurs in depths varying from 6 to 20 

 fathoms, on a sandy or gravelly bottom. 



Distribution. British Isles (Brady), coast of France (Canu). 



Gen. 17. Peltldium, Philippi, 1839. 



Syn : Oniscidium, Glaus. 

 Reticulina, Cleve. 



Generic Characters. Body short, flattened, strengthened with very con- 

 spicuous anastomosing chitinous stripes. Cephalic segment very large and ex- 

 panded, lateral parts not inflexed vent-rally; rostrum more or less prominent. 

 Epimeral plates of all the segments of metasome, including those of the last, 

 lamellarly produced, tongue-shaped, recurved. Urosome very short, with the 

 genital segment expanded on each side like those of metasome; distal part very 

 small and soft-skinned. Caudal rami narrow, with one of the apical setse 

 considerably elongated. Eye apparently consisting of 3 separate parts, one 

 median and 2 lateral. Anterior antennae comparatively short, 6 8-articulate. 

 Posterior antennae of about the same structure as in Altcutha. Mandibular palp 

 uniramous. Maxillae with the palp imperfectly developed, wanting the exopodal 

 appendage. Anterior maxillipeds with the outermost of the lateral lappets very 

 slender, terminal joint likewise exceedingly elongated and narrow, produced at the 

 tip to a short digitiform process. Posterior maxillipeds with the basal part uni- 

 articulate; hand very large. First pair of legs with the outer ramus resembling 

 that in Alteutha, inner comparatively broad, lamellar, biarticulate. Natatory legs 

 slender, of normal structure. Last pair of legs wholly obtected by the epimeral 

 parts of the body, biarticulate, falciformly curved, distal joint armed at the tip and 

 outer edge with strong spines. 



9 Crustacea. 



