DUBLIN NATUEAL HISTOEY SOCIETY. 
203 
Thompson). I have not verified this last. South of Ireland (J. Y. Thomp¬ 
son). 
“ Yaunthompsonia (/S 'pence Bate), 
*‘ Carapax angulos laterales ante oculos convenientes. Antennas supe- 
riores nullse. Pereii segmenta quinque posteriora carapace nuda. Pleo¬ 
poda pare ultimo excepto, absunt. Telson perparvulum. 
“ The lateral angles of the carapax meeting before the eyes ; upper 
antennse wanting; five posterior segments of the pereion (thorax) not 
covered by the carapax; all the pleopoda, the last pair excepted, absent; 
telson rudimentary. 
“ Yaunthompsonia ceistata (Sp. Bate), 
11 Scoepionuea vulgaeis (J. V, Thompson). 
“ Carapacis regione dorsali medio cristato, denticulato. 
“ The anterior portion of the central dorsal region of the carapace with 
a ridge of minute teeth; lower antennae, four joints, the last a fila¬ 
mentary appendage; posterior pleopoda, with their rami unequally two- 
jointed, as long as the peduncle, and armed with stout spines arranged 
chiefly along the inner margin; telson triangular, squamiferous, ciliated. 
“ Length -25 inch. 
“ The figure and description are from a female carrying ova; there 
are several specimens in the collection, two of them with ova. 
“ This species approximates nearer to Guma Pdwardsii (Kroyer) than 
to any other I am acquainted with. It probably forms with it, as sug¬ 
gested in my memoir on the British Diastylidse ‘ Annals, Hat. Hist.,’ 
1856), a genus distinct from Cuma, and which may be readily distin¬ 
guished by the character of the jive segments of the pereion being per¬ 
fectly developed posterior to the carapace, whereas in Cuma there are 
but four thus developed. 
