bevsebnet. fortil gaaende ud i en bred horizontal Pande- 
plade. 0ienloberne tydeligt adskilte. men meget smaa, be- 
bggende ved Hovedets ydre Hjorner. lste trie Eorkrops- 
segment. jevnt afrundet til Siderne og forsynet med smaa 
°g stuinpe Epimerer. Bagkroppen for holds vis kort, med 
sidste Segment lidet smalere end de pvrige, lste Par Fo- 
lere vidt adskilte. med Skaftets lste Led meget storr og 
pladeformigt. sidste Led ganske lidet, Svoberne forholdsvis 
korte. den ydre bos Hannen betydelig stserkere udviklet end 
bos Hunnen og forsynet med tsstte Knipper at Sandseboi stei . 
-det Par Folere meget tvnde, simple, uden Biplade, med 
kort Svobe. Kindbakkerne vel udviklede, med de bag det 
tandede Parti tcestede Tomer simple, Tyggetortsatsen smalt 
cylindrisk. Palpen sserdeles tynd og sparsomt bprstebesat. 
Saxfodderne med de 2 Haanden forudgaaende Led smale 
bos Hannen sserdeles stserkt forlamgede, selve Haanden 
stserkt opsvulmet med ln.uge tilspidsede Fingre; et lidet 2- 
leddet borstebesat Yedhaeng (rudimentser Exopodit) ved Basis. 
Oravei'sdderne kraftigt byggede. uden A edhaeng ved Basis, 
med de ydre Led pladeformigt udvidede og bevafonede med 
stserke Toruer. hos Hannen enormt forlfflngede. Gangfed- 
berne smmkre og svagt byggede samt sparsomt horstebesatte. 
Bagkroppens Buglemmer alle vel udviklede. med den ydie 
Blade bestaaende af 2 tydelige Segmented Halevedhmngeiie 
al et lignende Udseende som bos Slsegten Apseudes, men 
forholdsvis kortere. 
Bemserkninger. Slffigten Sphyrapus er opstillet at 
Norman i en under Arbeide vserendc Afhandling ovei Iso 
Poder indsamlede under de engelske Expeditioner. .leg hai 
ved nievnte Forskers A'elvillie havt Anledning til at under- 
S0 ge 2 meget distincte Arter tilhprende denne Shegt. nemhg 
Sphyrapus hides og malleolus, og har derved kunnet o\ei- 
bevise mig om, at den nedenfor nsermere omtalte I’ oim 
bgeledos er en mgte Spbyrapus. Foruden disse o Aitei 
borer ogsaa herhen den at' mig som Apseudes anomalus charac- 
teriserede uorske Form. Slmgten teller saaledes for Tiden 
I Arter. 
Fra Slsegten Apseudes skiller den sig blandt andet 
meget hestemt ved Mangelen af det eiendommehge blacl- 
foriuige Vedhseng til 2det Par Folere og derved, at kun 
Saxfodderne. men ikke som hos Apseudes tillige Gravefed- 
derne, har en rudimentfer Exopodit ved Basis, fiemde es 
Ve( l den eiendommelige Udvikling af begge disse Fodpar 
sa mt lste Par Folere hos Hannen. endelig derved. at den 
ydre Plade pa a Bagkroppens Buglemmer bestaar at 2 tyde- 
bge Segmenter. 
above, anteriorly protending as a broad, frontal plate. Ocular 
lobes distinctly separate, but exceedingly small, placed at 
the outer comers of the head. First free segment firmly 
connected with the cephalic segment, uniformly rounded 
toward the sides, and furnished with small and obtuse 
epimera. Abdomen comparatively short, with the terminal 
segment but a trifle more slender than the others, bust 
pair of antenna? widely separated, with the 1st joint ot 
the peduncle very large and lamelliiorm, the last joint 
quite small, the flagella comparatively short, the outer one 
in the male much more powerfully developed than in the 
female, and armed with dense fascicles of sensory bristles. 
Second pair of antennae exceedingly slender, simple, without 
secondary plate, and having a short flagellum. Mandibles 
well developed, with the spines attached behind the dentate 
part simple, the molar projection narrow-cylindric. the palp 
exceedingly slender, and but sparingly beset with bristles. 
Chelipeds with the 2 joints preceding the hand narrow, 
and in the male very greatly produced; the hand itseli 
much swollen, with long, pointed fingers; a small two-jointed 
appendage (rudimentary exopodite), beset with bristles, at 
the base. Fossorial legs powerfully developed, without any 
appendage at the base; the outer joints lamelliform-dilated. 
and armed with strong spines : in the male, remarkably pro- 
duced. Ambulatory legs more slender and feeble in struc- 
ture, as also sparingly furnished with bristles. Pleopoda 
all well developed, with the outer plate composed of 2 
distinct segments. Caudal appendages presenting a similar 
appearance to those in the genus Apseudes, but comparatively 
shorter. 
Remarks. — The genus Sphyrapus was established 
by Norman, in a Memoir he had commenced on the Isopods 
collected during the various British Expeditions. By the 
kindness of that naturalist 1 was enabled to examine 2 very 
distinct species of the said genus, — viz. Sphyrapus hides 
and /S', malleolus, and feel convinced, from the result of my 
investigations, that the form described in detail below is 
likewise a. true Sphyrapus. Exclusive of the aforesaid 3 
species, comes the Norwegian form to which I had given the 
appellation of Apseiules anomalus. The genus comprises 
therefore at present 4 species. 
From the genus Apseudes it is. for example, unmis- 
takeably distinguished by the absence of the peculiar squami- 
form appendage on the 2nd pair of antennae, and by the 
chelipeds only — not as in Apseudes the fossorial legs 
a l so __ being furnished with a rudimentary exopodite at, 
the base; moreover, by the peculiar development of both 
those pairs of feet, as also of the 1st pair of antenna; in 
the male; and finally by the outer plate of the pleopoda 
consisting of 2 distinct segments. 
^ en uorske Nordhavsexi>edition. O. Sars: Ciustacea. 
