464 Part III. — Twentieth Annual Report 



the mandibles, and the one-branched mandible-palp, it does not agree very 

 well with either of the genera named, which are its nearest allies. 



LaofJionte similis (Claus). 



This species was obtained in the same material with the last, collected 

 off St. Monans ; and it was also taken from the swinimerets of a Spider 

 Crab (Hyas arenarius) from the Bay of Nigg on May 23rd, 1901. 



Laophonte curlicauda, Boeck. 



Specimens of this species were obtained on several occasions on the 

 swimmerets of the common Shore Crab {Carcinus mainas)^ but whether 

 its occurrence on the swimmerets of the Crab was accidental or whether 

 the copepod is associated with the Crab as a commensal, is a question 

 that will require further research to determine. It may be mentioned, 

 however, the Laophonte was obtained as described on almost ever Crab 

 examined. 



Normanella attenuata, A. Scott. PI. XXIII., figs. 2-4. 



1896. Normanella attenuata, A. Scott, Kept, for 1895, on Lan- 

 cashire Sea-Fisheries Laboratory, p. 47, pi. iv., figs. 8-20. 



This species, which was first discovered in a gathering collected one 

 mile off Spanish Head, Isle of Man, from a depth of 16 fathoms, is now 

 added to the fauna of the Firth of Forth ; it was obtained in dredged 

 material from Station VI. (off St. Monans), at a depth of about 10 

 fathoms. Normanella attenuata is a slender species, measuring about 

 a millimetre in length. The rostrum is very small ; the autennules are 

 slender, somewhat elongated, and nine-jointed. The outer branches of the 

 first four pairs of thoracic feet are all three-jointed, but the inner branches 

 of the first three pairs are two-jointed, while in the fourth pair the inner 

 branches, like the outer ones, are three-jointed. The inner branches of 

 the first pair, which are considerably longer than the outer ones, have the 

 end joints short (fig. 3), and armed at the apex with an elongate spine, 

 and two setae of unequal length. The inner branches of the second, third, 

 and fourth pairs are shorter than the elongate outer branches. 



The fifth pair are broadly foliaceous and of moderate size, as shown 

 by the drawing (fig. 4), 



In the female the first segment of the abdomen is larger than those 

 which follow, being composed of two coalescent joints, as shown by the 

 habitus figure (fig. 2). 



In this species the thoracic portion of the body is rather shorter than 

 the abdomen, and gives to the animal a more than usually slender 

 appearance. 



Though, from its occurrence in the Forth, Normanella attenuta would 

 appear to have a moderately extensive distribution, it does not seem to be 

 very common. This species differs from Normanella rhibia, Brady and 

 Robertson, in its general conformation, by its elongated antennules, and 

 by the form of the fifth pair of thoracic feet ; but it differs more 

 particularly in that the inner branches of the fourth pair are three-jointed. 

 In this respect it disagrees with the generic definition of Normanella, 

 and may for this, and perhaps one or two other reasons, require to be 

 removed to another genus. 



