NOTES ON COPEPODA FROM FIRTH OF FORTH 93 
variety of Longipedia were observed after the above Notes 
had been prepared. This variety agrees in size and with the 
detailed figures and description of Longzpedia coronata in Dr. 
Geisbrecht’s work on the free-living Copepoda of Kiel 
Fohrde, but differs from the description and figures of the 
“male” in “ British Copepoda,” and from Longzipedia coronata, 
partially described and figured in the present Notes, in the 
following particulars, viz: 
(1st) In the armature of ate first pair of swimming-feet 
being more slender ; (2nd) in the outer branches of the second 
pair being proportionally longer. The two first joints of the 
outer branch are about equal in length to the two first joints 
of the inner one, and the large spiniform seta on the outer 
edge of the long third joint of the inner branch has a position 
nearly intermediate between the two smaller sete on the inner 
edge; and (3rd) the middle lamellz of the fifth pair of feet in the 
female are much narrower and more elongate. These differ- 
ences, so far as we can make out, appear to be constant. For 
the purpose of provisionally distinguishing this variety, we 
page oP to call it variety mzzor. Length of variety, °85 mm. 
(J5th of an inch). On the other hand, the form partially 
Beenibed here as Longipedia coronata (type) agrees practic- 
ally in size and in structure with the so-called “male” of 
Longipedia described in “British Copepoda” and in “ Die frei- 
lebenden Copepoden,” while that described here as Canuella 
perplexa agrees in structure with the so-called “female” of 
Longipedia in “ British Copepoda.” We have not seen Boeck’s 
description, and are unable to say which of the forms now 
referred to agrees with that described by him. 
(5) In 1867 M. Hesse recorded! a new Copepod (Suna- 
vistes pagurt) living as a commensal in the same shell with 
Pagurus (a kind of hermit-crab), and which in some respects 
agrees with the form described by us here as Canuella perplexa, 
but differs from it in the following important points. The 
first abdominal segment in the female is “aussi long que les 
quatre autres; il est séparé du thorax par un espace assez 
écarté et arrondi qui facilite les mouvements du corps,” and 
each of the two ovisacs “forment un ovale tres-allongé et 
1 «Ann. Sc. Nat. (Zool.),” 5th series, vol. vii. p. 205, Plate IV. Figs. 11- 
25; also of. ced. p. 211. 
