34 



TITE VOYAGE OF H.M.S. CHALLENGER. 



Depth in Fathoms, 



(?) 



(?) 



(?) 



Name. 



Geographical Distribution. 



Phoxichilidiiim jolinstonianum. While (sp. ). Nymplion South Seas. 

 joknstoiiianum, White, Proc. Zool. Soc. of London, 

 vol. XV., 1847. There can be no doubt that this species 

 belongs to Plwxich Hid turn : eyes situated above the 

 insertion of the chelicera (mandibles) ; beak (pro- 

 boscis) springing from the under side of the head ; 

 cliolicera with two basal joints, &c. The description, 

 however, is hardly sufficient. What White describes 

 as palpi are in all probability the ovigerous legs. 

 (1) Phoxichiliilium phusma, Wliite (sp). Nipniihoii phasma, South Seas. 

 White, Proc. Zool. Soc. of London, vol. xv., 1847. 

 Whether this species also belongs to this genus or is 

 to be considered as a Pallene (it is certainly not a 

 Nymphon) is not to be ascertained. White says it may 

 possibly be the other sex of the preceding 



Oomerus, Hesse (1874). 



Oculiferous tubercle plac id at the base of the proboscis ; mandibles with long pincers ; 

 palpi represented by small knobs ; ovigerous legs not present in the female. 



(i) Oomerus st/'gmatopliorus, Hesse, Ann. d. Sc. Nat. Zool., 

 Sitoe s^j.jg^ XX., 1874, art. 5, p. 18, pi. viii. In all 

 probability this is a species of the genus Phnxiduli- 

 dium, Milne-Edwards. Only a female without oviger- 

 ous legs, and with highly developed ovaries in the 

 fourth joint of the leg, was observed by Hesse. 



Brest (Bretagne). 



Family IV. Phoxichilid^. 



Contains those Pycnogonida, which have neither mandibles nor palpi, or have them 

 rudimentary. Ovigerous legs, as a rule, only in the males, whereas Hannonia possesses 

 them in both sexes ; always without denticulate spines. Genera : Hannonia, Phoxicliilus, 

 Pycnogoniini. 



