48 
Sterrelse, yed 0inenes ringe Udvikling, Antermebladenes 
St 0 rrelse saint den meget charaeteristiske Bevaebning af 
det midterste Halevedhaeng. 
Beskrivelse af Hannen. Legemets Form er (se PL 
Y, Fig. 5 og 6), som hos de tidligere bekjendte Arter af 
denne Slsegt, meget kort og plump, med stierkt opsvulmet 
Forkrop og betydelig tyndere Bagkrop. 
Rygskjoldet dackker Forkroppen nsesten fuldstsendigt 
og viser en meget skarpt markeret Cervicalfure, der er 
stserkt udbuet bagtil. Pandepladen springer tydeligt frem 
mellem Roden af 0inene og er af trekantet Form samt 
nsesten retvinklet, 
0inene er ussedvanlig smaa, og, skjpndt de i Midten 
er adskilte ved et temmelig betydeligt Mellemrum, rager de 
dog ikke, som hos de pvrige Arter, ud over Sideme. De 
er af kort kplledannet Form og forsynet med et lyst gulredt 
Pigment, der paa de nylig optagne og endnu levende Ex- 
emplarer viste et sserdeles brillant guldglindsende Skjser. 
lste Par Fpleres Skaft er som hos Skegtens pvrige 
Arter tykt og plumpt, med Basalleddet forholdsvis kort og 
sidste Led meget stort og ligesom opsvulmet. Det bserer 
ved Enden det for Hannerne eieridommelige haarede Appen- 
dix, der er af betydelig Stprrelse og konisk Form samt 
udtrukket i et spidst Bjorne. Naar de talrige kostformigt 
divergerende Bprster, hvormed dette Appendix er besat, 
fjernes, viser det sig, at alle disse udspringer fra et Here 
Gauge zigzagformigt bugtet baandformigt Felt, der slynger 
sig langs ad Yedlisengets nedre Flade (se Fig. 7). 
2det Par Fpleres Blad (se Fig. 8) er i Sammenlig- 
ning med de pvrige bekjendte Arter af Slaegten, forholdsvis 
temmelig stort og overrager kjendeligt lste Par Fpleres 
Skaft. Af Form er det aflangt-rhomboidalt, omtrent 3 
Gange lsengere end bredt og med Enden meget skjaevt af- 
skaaret i Betningen indenfra udad. Den ydre glatte Rand 
lpber fortil ud i et kort tandformigt Fremspring ; den indre j| 
Kant og Enden er forsynet med et meget betydeligt Antal 
af lange Randbprster. Svoben er vistnok af meget anselig 
Lsengde, da dens Skaft er sserdeles kraftigt bygget; men 
dens ydre Del var paa de underspgte Exemplarer afbrukket 
ligesom Svpberne paa lste Par Fplere. 
I Munddelenes Bygning er ikke nogen vsesentlig Af- 
vigelse fra de 0vrige Arter at notere. 
Ogsaa Fpdderne viser det for Slaegten charaeteristiske 
Udseende. Deres ydre Parti (Fig. 9) er omtrent af det | 
foregaaende Leds Laengde og bestaar, foruden den tydeligt 
udviklede Endeklo, af 3 med lange Borsteknipper forsynede 
Led, hvoraf det fprste er stprst og ved en meget skjsev 
Sutur forbundet med det meste. Svpmmegrenene er ikke 
meget stserkt forlsengede, men af sserdeles kraftig Bygning, 
med Basaldelen stserkt pladeformigt udvidet og muskulos. 
De til Bagkroppens Yentralside fsestede Lemmer (se l 
considerable size, by the slight development of the eyes, the 
size of the antennal scales, and the highly characteristic 
armature of the telson. 
Description of the Male. — Form of the body (see 
PI. V, figs. 5, 6), as in the previously known species of 
this genus, exceedingly short and clumsy, with the cephalo- 
thorax greatly swollen and the abdomen, by comparison, 
very slender. 
The carapax covers almost entirely the anterior division 
of the body, and has a very sharply defined cervical groove, 
strongly arched posteriorly. The frontal plate triangular, 
almost right-angled, in form, and distinctly projecting between 
the bases of the eyes. 
The eyes are unusually small, and, though separated 
in the middle by a rather wide space, do not, as in the 
other species, project over the sides. They are clavate in 
form, and furnished with a light yellowish-red pigment, 
which, in recently taken and still living specimens, had an 
exceedingly brilliant, golden lustre. 
The peduncle of the 1st pair of antemue is, as in the 
other species of the genus, thick and clumsy in shape, with 
the basal joint comparatively short, and the last joint ex- 
ceedingly large and, as it were, swollen. It has at the 
extremity the hair-clothed appendix peculiar to the males, 
which is of considerable size and conical in form, and 
produced into a sharp-pointed corner. On removing the 
numerous, scopi form, diverging bristles with which this 
appendix is beset, they are all found to issue from a zigzag, 
riband-shaped tract, winding along the lower surface of the 
appendage (see fig. 7). 
The scale of the 2nd pair of antennae (see fig. 8) is, 
compared to that in the other known species of the genus, 
rather large, and projects perceptibly over the peduncle of 
the 1st pair of antennae. In form it is oblongo-rhomboidal. 
about three times longer than broad, and with the end 
very obliquely truncate, from within to without. The smooth 
outer margin is produced anteriorly into a short dentiform 
projection; the inner margin and the end are furnished 
with a very considerable number of long marginal bristles. 
The flagellum must certainly attain a very considerable 
length, the structure of its peduncle being exceedingly 
powerful; but its outer portion in the specimens examined 
was broken off. as also the flagella on the 1st pair of 
antenna'. 
The structure of the oral appendages exhibits no 
essential deviation from that observed in the other species 
of the genus. 
The legs, too, have the usual characteristic appearance. 
Their outer portion (fig. 9) is about equal in length to 
the preceding joint, and consists, exclusive of the dis- 
tinctly developed terminal claw, of 3 -joints, furnished with 
long fascicles of bristles, the first joint being the lai'gest, 
and connected by an exceedingly oblique suture with the suc- 
ceeding one. The natatory branches are not very elongated, 
but remarkably powerful in structure, with the basal portion 
greatly dilated, and muscular. 
The limbs attached to the ventral side of the abdomen 
