390 = Dr. Strahl on new Thalassine from the Philippines. 
there are two lateral ridges running near and parallel to the 
margins, and united by a transverse ridge which runs near the 
articular margin. The lateral appendages are fringed all round; 
the inner one exhibits a central ridge, and the outer one two 
slightly bent faint lines on the outer half. 
The subcheliform fifth pair of feet connects this species with 
Audouin’s Gebia stellata in the text to Savigny’s ‘ Description 
de Egypte.’ Judging from the forehead, indeed (with regard 
to its projection and denticulation), the latter might be either a 
Gebia or an Azius; but the scale is wanting on its external an- 
tenne, and therefore it can be approximated only to Gebia. The 
admirable figure on the tenth plate, however, shows us that 
this Gebia stellata cannot be a Gebia at all, but that it must 
form a new genus. Audouin has not given a description of the 
Crustacean in question ; I will therefore give one here from the 
figure, under the name of 
CALLIADNE, nov. gen. 
To the species figured I give the name of C. Savignit. The 
cephalothorax exhibits in front only a small rounded frontal 
process, which is finely pointed in the median line, but is sepa- 
rated laterally by gentle sinuosities from the projecting lateral 
ridges, which bound the epigastral region on the sides. These 
ridges are beset with a row of fine teeth directed forwards, and 
run in the furrow which bounds the epigastral region. This 
region is smooth posteriorly ; the larger anterior part, as far as 
it is bounded laterally by the denticulated ridges, and including 
the frontal process, is densely covered with fine teeth obliquely 
directed forwards. These teeth, however, are symmetrically dis- 
tributed in five series, in such a way that one series exactly oc- 
cupies the median line, and on each side of this two rows are 
placed at an equal distance between it and the lateral ridges. 
This structure of the forehead removes this genus more from 
Gebia than De Haan’s Laomedia, with which our genus is pro- 
bably most nearly allied on account of the cheliform first pair of 
feet. I must remark here that Dana’s diagnosis of the genus 
Laomedia, in as far as it represents the pedes quinti as obsoleti, is 
founded upon a misapprehension of De Haan’s statements. De 
Haan says, pedes quinti desunt; that is to say, in the example 
before him they had been destroyed, as may be seen distinctly 
from the figure of it given by him. If we had any knowledge 
of the fifth pair of feet in Laomedia, we should know with more 
certainty whether Calliadne and Laomedia should remain sepa- 
rate or be brought together in one genus. 
The antennz and the first two pairs of feet of Calliadne are 
richly clothed with long hairs on their lower surface. The joints 
