CRUSTACEA. 
83 
12. Pagurus pedunculatus.* Oliv., Encycl. Meth. Ins. 8. p. 647. sp. 31. 
Cancer pedunculatus. Herbst, 3. heft 4. p. 25. taf. 61. fig. 2. 
A peculiar characteristic of this species, viz. the neat white band that girts the eye-peduncle, is 
obliterated in Herbst’s figure by the carelessness of the colourer, who has passed the tint over it, though 
it is distinctly indicated in the engraving, and particularly mentioned in the text.f 
In Olivier’s account of this species, three dentations are described in the front of the carapace, 
which are exaggerated in the figure, whilst he altogether omits the white zone of the eye-stalk. 
In the present specimen the colour of the thorax is white, with a slight lilac stain in the middle. 
The claws are a yellowish white, clouded with lilac. The left chela is much larger than the right, the 
inner margin of the ulna is produced in form of a dentated crest, the carpus is dentated above, and, 
together with the manus , is tuberculated externally. The antepenultimate joints of the second and 
third pairs of claws have two teeth superiorly at their distal extremity; the last joints are elongated, 
dentated superiorly, with a longitudinal line externally, hirsute, and terminated by sharp black claws. 
Most of the hairs in this species have a beautiful green colour. 
The external foot-palpe has the first joint trihedral, with the internal margin minutely dentate, 
the teeth of a black colour; the anterior margin has also three small teeth, and the second joint is 
similarly armed on the same aspect ; the other joints are simply hirsute. The flag-rum is nearly as 
long as the foot-palpe, the first joint is enlarged, compressed, and extends to the third joint of the 
foot-palpe. 
13. Pagurus pxctus. n. s. 
Pag. parvus, chelis inoequalibus , digitis granulatis , sinistra majore ; pedihus albis rubro armillatis , tertiis infra penicil - 
lato-hirsutis. 
Long . corp. unc. 1, lin. 9. 
Two specimens of this beautiful species were taken at Oahu, Sandwich Isles. The thorax is 
slightly punctate, of a white colour, and with faint indications of the tridentate character at the 
anterior margin. The ophthalmic peduncles are long, of a pink colour, with the scale at the base of 
a bright scarlet hue. The mesial antennse do not exceed in length the greater chela: they are of a 
yellow colour. 
The joints of the pedipalpus are slender; it is nearly equalled in length by the flagrum, whose 
second joint is dilated, having a transparent scale externally. The chelcc are obtuse, of a bright 
yellow colour, smooth, except the digits, which are studded with small white tubercles ; the manus 
of the right chela is notched at the upper margin. 
* The nervous system of this species consists, as in all annulosa, of ganglions regularly disposed, and brought into 
communication by a double nervous chord. The first or cephalic ganglion lies beneath the middle of the anterior margin 
of the thorax ; it is square-shaped, and has four lobes faintly indicated ; it gives off first the nerves to the eyes, below 
these, nerves to the antennas, and then two small filaments, that pass down one on each side the stomach, and join a 
ganglion which supplies the instrumenta cibaria and branchiee. The third is a large oblong ganglion, situated at the 
base of the chelcc, and extending to the base of the second pair of claws, both of which it supplies. The connecting chords 
then proceed separately for a short distance, and join a ganglion smaller than the preceding, which supplies the third 
long pair of legs. From its posterior part, this ganglion also gives off three pairs of nerves ; the two inferior pairs go to 
the fourth and fifth diminutive claws; the remaining pair, which are very minute, are continued along the concavity of 
the liver, partly imbedded in that gland, and when they reach the anus, join a small ganglion which supplies the claspers 
at the extremity of the abdomen. The larger nerves evidently arise from the ganglions by a number of separate small 
fibrils. 
t “ Die Augenstiele selbst sind etwas gedriickt, roth, mit einer weissen Binde in der Mitte,” p, 26. 
