248 Horr & Braumontr—Survey of Fishing-grounds, W. Coast of Ireland, 1890-91. 
truncate edge set with numerous unguiform spines; the inner in the form of a 
setose tubercle. Second maxilla small and feeble. Lirst maailliped strong; basal 
joint without an incisive lamina, second joint very short, third rather swollen ; 
penultimate without sete, but strongly spined at the external apex; last joint very 
small and armed with a long, narrow apical spine. Legs small and feeble, sparsely 
setose ; tarsus with few articulations, nail inconspicuous.  Jneubatory pouch of 
female of three lobes on each side, the anterior pair rudimentary. Genital 
appendages of male very long, anteriorly directed, without sete. Pleopods rudi- 
mentary, simple, alike in both sexes. Telson short, anterior part of lateral margin 
naked, posterior part closely spined, a small apical cleft. Uropods short, subequal ; 
otocyst well developed. (Abbreviated from G. O. Sars.) 
Mysidella typica, G. O. Sars. 
(JA, iby ste, G, Wo) 
Mysidella typica, G. O. Sars, Carcinolog. Bidrag til Norges Fauna, I. Monogr. Mysider, Hefte III., 
1879, p. 86, pls. xxxy., XXXVi. 
Body rather abbreviate ; cephalo-thorax short, sub-gibbous ; abdomen much more 
slender, cylindrical, slightly tapering, last segment short; last two segments of 
cephalo-thorax exposed dorsally. Rostrum distinctly angular. yes well developed, 
but not large, rather remote from each other, bright fulvous. Pedunele of antennule 
scarcely one-fourth as long as the cephalo-thorax, its basal joint short, nearly as 
wide as long. Antennal scale three times as long as wide, reaching by scarcely a 
third of its length beyond peduncle of antennule, outer margin nearly straight, 
inner distinctly arcuate, apex bluntly acuminate.  S%rst mazxilliped with the pen- 
ultimate larger than the preceding joint, and armed with three teeth. Legs, first 
hardly longer than second maxillipeds; tarsus shorter than preceding joint, 
2-articulate ; nail slender, setiform ; second to fifth legs sub-equal in length; tarsus 
longer than preceding joint, 3-articulate ; posterior leg much longer than the rest, 
very narrow; tarsus elongate, 3-articulate. Te/son hardly one-fourth as long as 
abdomen, about twice as long as wide, linguiform, tapering distinctly towards the 
apex; anterior half of lateral margin naked, posterior half with about eighteen 
closely set spines of gradually increasing length, apex obtusely rounded, with a 
short, narrow rectilinear cleft; each side of cleft with (about) two to four minute 
spines. Inner uropod a little longer than telson, about seven-eighths as long as 
the outer, its inner margin spined throughout (from the level of the centre of the 
otocyst). Colour, body pellucid with a little red pigment here and there. Length 
