PYCNOGONIDA. 
39 
three stout sub-equal joints, followed by a fourth nearly as long as the three together, 
only a great deal more slender, and terminating in a very minute claw; a conical 
abdomen lies at the extremity of the trunk, the posterior part of which is provided 
with a small number of very long setae. 
LEIONYMPHON. 
Prof. Mobius’(23) has described this genus as follows:— 
“ Korper kurzhaarig. Rumpf breit. Beintrager am Grande zusammenstossend. Hals kurz and 
breit. Augenhiigel konisck mit 4 Augen. Russel walzenformig. Finger ohne Zahne. Palpen 
neungliedrig. Brutbeine zehngliedrig, 7. Glied beim Mannchen kurz und dick ; alle Glieder nur kurz 
behaart.” 
Leionymphon, n . g * 
Rumpf ebenso breit wie lang. Die beintragenden Seitenforsatze der Rumpfglieder stossen 
zusammen. Kopfsegment breit. Augentrager konisch. 
Russel walzenformig. Scheren kurzer als der Russel. Finger ohne Zahne. Palpen neungliedrig. 
Brutbeine zehngliedrig ohne eigentiimlich geformte Dornen oder Zahne an den 4 letzen Gliedern. 
An den mannlichen Brutbeinen ist das 7. Glied sehr kurz, aber viel dicker als die andern 3 Endglieder. 
This genus was established for the reception of a remarkably fine species, L. 
striatum (Mobius), of which however only two examples were taken, and both of them 
immature. A species in the same collection described by Prof. Mobius as Colossendeis 
gibbosa appeared to me to be closely related, and an examination of the two species 
which I have been permitted to make fully confirmed this suspicion. The ‘ Discovery ’ 
has brought from the Antarctic several species which are unquestionably very closely 
related. The ‘ Frangais ’ (2) has also found two species. Two more were described 
some years ago by Dr. Pfeffer (24), from South Georgia, and placed by him in the genus 
Ammothea. 
That the genus Leionymphon is very closely related to Ammothea is beyond all 
question. To this latter genus not less than thirty species have been ascribed, but 
many of them present such peculiar characters that they cannot fairly be included. It 
is not possible here to revise the genus, but I have considered it desirable to modify 
Prof. Mobius’ definition of the genus Leionymphon, and to give a list of those species 
which I consider should be included therein. 
Leionymphon. 
Body more or less robust, with transverse ridges developed to a greater or less extent, 
lateral processes widely separated or otherwise ; spurs rather than spines, or traces of them, occur on 
the lateral processes #nd first coxes. 
The Proboscis is large, cylindrical or pyriform. 
The Palps are nine-jointed, the last five joints being short. * 
* “Xeio? glatt. Die 4 letzten Glieder der Brutbeine sind nicht mit eigentiimlich geformten Zahnen oder 
Dornen besetzt.” 
VOL. III. 
R 
