116 Mr'.G. Hodge on the British Pycnogonoidea. 



Pallene pygmaa (Hodge). PI. XIII. figs. 16 & 17. 

 Thorax robust. Legs long and slender, constricted at the joints, 

 last joint falciform, with a strong toothed shoulder at the 

 base ; two strong spines on the sixth joint. Rostrum short, 

 stout. Footjaws closely approximated. Oculiferous tubercle 

 moderately long. Abdomen stout. 



This species was taken by Mr. Spence Bate in the neighbour- 

 hood of Plymouth, so far back as 1853, and by him noticed in 

 a paper of that year, read before the British Association at Hull. 

 It was, however, neither named nor described, his remarks bear- 

 ing upon the larval stages of these animals. I have also taken 

 a single specimen upon the Durham coast. Length -pvo" of ^^^ 

 inch. 



The three species new to Britain all belong to the genus 

 Nymphon. They were described by Kroyer in Gaimard's Scan- 

 dinavian ^ Voyage.^ One species [Nymphon Stromii) has been 

 taken in Shetland by the Rev. A. M. Norman ; the other two 

 [Nymphon mixtum and N. longitarse) have been taken by myself 

 on the Durham coast. 



The following list contains all the species at present recorded 

 as inhabiting the British seas : — 



Nymphon, Fabricius. Achelia, Hodge. 



gracile, Leach. echinata, Hodge. 



grossipes, Fabricius. ■ hispida, Hodge. 



femoratum. Leach. Isevis, Hodge. 



pictum, Pallene, Johnston. 



giganteum, Johnston. brevirostris, Johnston. 



longitarse, Kroyer. circularis, Goodsir. 



mixtum, Kroyer. pygmaea, Hodge. 



Stromii, Kroyer. Phoxichilidium, M.-Edwards. 



hirtum, Fabricius. coccineum, Johnston. 



brevitarse, Kroyer, globosum, Goodsir. 



Johustoni, Goodsir. olivaceum, Gosse. 



• spinosum, Goodsir. petiolatum, Kroyer (Pallene 



pellucidum, Goodsir. attenuata, Hodge). 



simile, Goodsir. vireseens, Hodge. 



minutum, Goodsir. Pasithoe, Goodsir. 



brevirostre, Hodge. vesiculosa, Goodsir. 



Ammothoa, Dana. Phoxichilus, Latreille. 



• brevipes, Hodge. spinosus, Montagu. 



longipes, Hodge. Pycnogonum, Fabricius. 



littorale, Strom. 



There can be little doubt that a careful examination of the 

 species found on various parts of our coast would add many new 

 forms to this list, especially amongst the smaller species. 



Whilst most departments of marine zoology have made rapid 

 strides within the last few years, our knowledge of the Pycnogons 

 has scarcely advanced. No doubt this is owing, in a great mea- 



