198 MR. GEORGE HODGE ON 
This species might at first sight be mistaken for Phowi- 
chilidium olivaceum (Gosse), but the closely approximated foot- 
jaws at once show its distinct character. 
Pallene pygmea (Hodge). Plate V., 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. Ros- 
trum short and stout. Foot-jaws closely approximated. 
Oculiferous tubercle moderately long. Abdomen stout. 
Length +é, inch. 
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. TI have also taken 
a single specimen upon the Durham coast. 
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 Strémit, has been 
taken in Shetland by the Rev. A. M. Norman; the other two, 
viz., Nymphon mixtum and Nymphon 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) 
gracile, Leach. 
Nymphon similis, Goodsir. 
minutum, Goodsir. 
brevirostre, Hodge. 
Ammothoa (Dana) 
brevipes, Hodge. 
longipes, Hodge. 
Achelia (Hodge) 
Achelia echinata, Hodge. 
hispida, Hodge. 
grossipes, Fabricius, 
femoratum, Leach. 
pictum. 
giganteum, Johnston. 
longitarse, Kroyer. 
miatum, Kroyer. 
Strémii, Kroyer. 
hirtum, Wabricius. 
brevitarse, Kroyer. 
Johnstoni, Goodsir. 
spinosum, Goodsir. 
pellucidum, Goodsix. 
levis, Hodge. 
Pallene (Johnston) 
brevirostris, Johnson. 
cireularis, Goodsir, 
pygmea, Hodge. 
