122 Rev. A. M. Norman’s Notes on British Amphipoda. 
Distribution. Hardanger Fiord and Aalesund, Norway, 
80-100 fath. (G. O. Sars); Christiania Fiord and Hange- 
sund (Boeck). 
The specimens found by me had all lost their antennules 
and antenne, and, as genera were in 1868 understood, ap- 
peared to me to be most nearly allied to Atylus. Melphidippa 
belongs to the Gammaride, which family has a secondary 
appendage to the antennules. In M. borealis, Boeck, and MZ. 
spinosa, Goés, this appendage is well developed, consisting of 
two or three articulations; but it will be seen that Boeck 
states that in the present species it is rudimentary, “ fere 
obsoleto ;”’ indeed, his figure shows no trace of it. 
Genus III. Mecaturopus, Norman, 1889. 
Dr. P. P. C. Hoek, in his ‘ Crustacea Neerlandica,’ has 
just described the type of this genus, and has used my name, 
which was MS. at the time he wrote, an act of the greater 
courtesy, inasmuch as I was unaware that he had met with 
the form, which, however, has been long known (twenty- 
five years) to myself and friends in Britain. Dr. Hoek has 
placed the genus in the family Pardaliscide, a position which 
in my opinion it cannot retain. The mouth-organs are quite 
different from those of Pardalisca. It does not, moreover, 
agree in the following very important characters :—“ Antenne 
superiores . . . articulis anterioribus apud marem coalitis et 
articulum magnum, intus fasciculis setarum instructum, junctis 
formantibus ”—or with the following particulars :—“‘ Pedes 
tertii et quarti paris [=first and second pereeopods] validi, 
articulo tertio brevi. Pedes trium parium ultimorum... 
unguibus longis.” Had Dr. Hoek been acquainted with the 
male or fully seen the mouth-organs he would not have 
assigned the genus to the Pardaliscide. His figures of the 
mouth-organs are very good as far as they go, except that 
the mandible was evidently seen by him in his dissection in 
an unsatisfactory position, while my own drawing also was 
defective as representing a broken specimen. I now give 
(Pl. X. figs. 15 and 16) illustrations of that member in two 
positions. The inner lamina (Pl. X. fig. 17) of the maxilli- 
peds also escaped his observation, while the outer lamina and 
palp are accurately figured ; this inner lamina is furnished at 
the extremity with about four blunt teeth, very similar in 
character to those of the outer lamina, and short sete, and on 
the distal portion of the side are a few plumose sete. The 
inner lamina of the first maxillz is very small, rounded, and 
bearing two or three sete. 
