114 Mr. G. Hodge on the British Pycnogonoidea, 



dredging expedition to the Dogger Bank, under the auspices of 

 the British Association. 



I have now to increase this list by the addition of ten species, 

 seven of which are new to science, and three new to Britain. 



The new species are contained in the following genera : — 

 Ammothoa, a genus not before represented by any British 



form. 

 Achelia, a new genus which I found it necessary to establish. 

 Pallene and Phoxichilidium. 

 The genus Ammothoa is in some respects like Nymphon, the 

 most decided diflFerence being the greater number of joints of 

 the palpi, Ammothoa possessing eight*, whilst Nymphon has only 

 five. The footjaws in Nymphon are always as long as or longer 

 than the rostrum ; in Ammothoa they are much shorter. 



I have two new species to describe, for which the specific 

 names of brevipes and longipes are proposed. 



Ammothoa brevipes (Hodge). PI. XII. figs. 1-4. 

 Limbs short and robust, furnished with moderately long, strong 

 spines. Rostrum conical, with the apex truncate. Footjaws 

 nearly two-thirds the length of the rostrum ; palpi equal in 

 thickness throughout, — if anything, slightly thicker at the 

 free end. Oculiferous tubercle terminating in a pointed wart 

 directed backwards. Abdomen long, slightly tapering. 



Several specimens have occurred on the Durham coast, from 

 deep water. Length ^-^ of an inch. 



Ammothoa longipes (Hodge). PI. XII. figs. 5, 6. 



Animal slender. Rostrum stout, as long as the thorax, tapering 

 to a blunt point. Palpi long and slender, the four terminal 

 joints of equal length. Footjaws long ; fingers destitute of 

 teeth. Oculiferous tubercle slightly tapering. 

 A single specimen from Polperro. Length ^-^-q of an inch. 



Achelia is distinguished by the possession of two pairs of 

 palpi — one pair long and slender, the other short and stout. 

 The genus may be thus characterized : — 



Antenna two-branched, one pair long and slender, eight-jointed; 

 the other pair short and stout, two-jointed, and produced imme- 

 diately in front of the oculiferous tubercle. 



In some respects this genus agrees with a form possessing 

 two pairs of palpi, which Kroyer named Zetes ; it may, however, 

 at once be distinguished by the very difi'erent character of the 



* The foreign forms are said to possess nine. 



