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. Beintriiger am Grundc zusammcnstosscnd. Hals kurz and 

 breit. Augenhiigel konisch mit 4 Augen. Riissel walzenformig. Finger oliuc Zahne. Pal pen 

 neungliedrig. Brutbeine zehngliedrig, 7. Glied beim Miinncheu kurz und dick ; allc Gliedcr nur kurz 

 bekaart." 



LEIONYMPHON, n.g* 



Rumpf cbenso breit wie lang. Die beintragenden Seitenforsatze der Rumpfglieder stossen 

 zusammen. Kopf segment breit. Augentrager konisch. 



Riissel walzenformig. Scheren kurzer als der Riissel. Finger ohne Ziihne. Palpen neungliedrig. 



Brutbeine zehngliedrig ohne eigentiimlich geformte Doruen oder Ziihne 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 ' Francais ' (2) lias 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. The 

 lateral processes widely separated or otherwise ; spurs rather than spines, or traces of them, occur on 

 the lateral processes and first coxaa. 



The Proboscis is large, cylindrical or pyriforni. 



The Palps are nine-jointed, the last five joints being short. 



* "Xti'os glatt. Die 4 letzten Glieder Jcr Brutbeine sind nicht init eigentiimlich geformten Ziihnen oder 

 Dornen besetzt." 



VOL. m. R 



