BRITISH PYCNOGONOIDEA. 195 
XIV.—List of the British Pycnogonoidea, with descriptions of 
several new species.** By Groraz Hover. [Pl. IV. & V.] 
No complete list of the British Pyenogons has appeared, and 
such information as we possess is scanty and scattered: it is 
difficult to account for this neglect, as these animals possess 
considerable interest, both in their life-history, and their pecu- 
liarly degraded physiological features. 
An examination of such records as I have been able to consult, 
has enabled me to compile a list of twenty-two species—the total 
number recorded as British. With two exceptions, that of a 
Phosxichilidium by Mr. Gosse, and a Phowichilidium and a 
Nymphon by myself, no new species have been published since 
Harry Goodsir’s and Dr. Johnston’s time. The former described 
seven species, principally from the Frith of Forth; it is possible, 
however, that two or three of them might not stand a very 
critical examination. The list, as it now stands, contains 
13 species of Mymphon, 
2 5 Patllene, 
4 a Phosxichilidium, 
1 43 Pusithoe, 
1 As Phozichilus, 
1 7s Pyenogonum, 
in all 22 species, including the four which were re- 
corded in my Report of the Pycnogons obtained last year, during 
the dredging expedition to the Dogger Bank. 
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 difference being the greater number of joints of 
* This paper was read also at the Newcastle Meeting of the British Association, 
Y 
