97 
larus, neither is the tip so much deflexed as in that species. The 
raptorial legs are rather slender, and are considerably compressed, the 
base of the terminal joint is very slightly thickened, the terminal part 
elongated and knife-shaped, the inner edge with two teeth; tarsi of 
the three last pair of legs styliform ; abdomen with the lateral mar- 
gins of the first five segments thin and membranaceous, the fifth with 
a notch at the hind angle; the sixth segment with six slight crests 
terminating in short spines, the two middle approximating; the seventh 
segment with a sharp crest which rises nearly as high above its dor- 
sal surface, as the space between its base and the edge of the segment ; 
the end of this crest is pointed; the marginal teeth of the seventh 
segment are long and sharp, and have a slight ridge behind; the 
penultimate joint of the outer branch of the appendages to the sixth 
ring long, and furnished on the outer edge with a series of nine spines, 
which are depressed, and cover each other at the base. In the G. 
scyllarus there are twelve of these spines. 
This species is about four inches long; in its dry state the greater 
part of the upper surface is tinged with a reddish hue, and along the 
middle of the back there is a pale line. 
The species of the genus Gonopactytus are,—1. G. chiragra; 
2. G. scyllarus; 3. G. Edwardsii, Berthold, Act. Gottingen. 1845, 
t.3.f.6; 4. G. eultrifer; 5. G. styliferus; 6. G. graphurus; 7. G. 
trispinosus. The G. Edwardsii is the species met with in nearly 
every box of insects and fish imported from China. 
On the same plate with the G. cultrifer is figured an Amphipod, 
which may be the species figured by Colonel Montagu in the ninth 
volume of the ‘Linnean Transactions,’ t. 5. f. 5, under the name of 
Oniscus Testudo. I have named this on the plate dcanthonotus Tes- 
tudo: it belongs to Prof. Owen’s genus Acanthonotus: in the British 
Museum it bears Dr. Leach’s manuscript name, Vertumnus Cranchii. 
The head is produced and pointed between the antennz, and instead 
of the small number of segments assigned by Colonel Montagu to his 
Oniscus, there is the normal number of the various genera of Amphi- 
poda. 
3. DESCRIPTION OF A NEW PUPINA AND TWO NEW HELICINAS, 
FROM THE COLLECTION or H. Cumine, Esa. By Dr. L. 
PFEIFFER. 
1. Puprna sruineuis, Pfr. P. testd oblongo-ovatd, tenui, pellu- 
cidd, nitidd, corned; spird sensim attenuatd, obtusiusculd ; 
suturd impressd, viz callosd ; anfractibus 6, supremis 3 converis, 
confertim striatis, sequentibus subplanis, levigatis, ultimo 4 lon- 
gitudinis paulo superante ; aperturd verticali, subcirculari, bi- 
canaliculatd, canali utroque aperto, ascendente, supero lamind 
validd, linguiformi, triangulari formato; peristomate subincras- 
sato, breviter expanso, margine columellari plano, linguiformi, 
acuto. 
Long. 10, diam. 5 millim. 
Hab. in Australia orientali. 
No. CCVII.—Procrepineés or THE ZOOLOGICAL SOCIETY. 
