16 On Parasitic Gopepoda of Fish. 



is of extraordinary size for animals in this genus. First pair 

 of maxillipeds placed close to the mouth, well developed; 

 second pair short, opposite to the abdomen and at the base of 

 the neck, thick and completely united, terminating in the 

 organ of adhesion, which has the form of a cup with a long 

 pedicle. This species is much like Anchorella falaXy Heller, 

 in form except for the great size of the abdomen. 



EXPLANATION OF THE PLATES. 



Plate III. ' 



Fig. 1. Cuh'f/us brevipedis, sp. n., 5- X G. ' 



ai. Frontal plate with anterior antenna. « 2. Posterior an- 

 tenna. Ha. Hamulus subsidiarius anterior. Md. Mandible 

 with palp. F. Furcula. 1 P, 2 P, .3 P. Peraeopods. 4 P 

 & 4. Perasopod slightly and highly magnified. 5 P. Rudi- 

 mentary fifth peraeopod. C.P. Caudal plate. 

 Fi'ff. 2. Caligus scomberi, sp. n., § . X 6. 



A 2. Posterior antenna. F. Furcula. 4 P. Fourth peraeopod. 

 C. Caudal plate. 



Plate IV. 



Fig. 1. Lepeophtheirus 2Jollachius, sp. n., §. X 6. 



2 a. Posterior antenna. H.s.a. Hamulus subsidiarius anterior. 



F. Furcula. 4 P. Fourth periBopod. 

 Fig. 2. Caligus obscurus, Baird, 5 . X b. 



A 2. Posterior antenna. H.s.a. Hamulus subsidiarius anterior. 



F. Furcula. 4 P. Fourth peraeopod (see Journ. Marine 



Biol. Assoc, vol. iv. no. 2), 

 Fig. 3. Elytrophora brachyptcra, Gerstaecker, $ J in situ. 



3 a, 3 b. Spermatophores detached. "■' 



Fig. 4. Mouth of Chondr acanthus triylce, 5 , X 20, showing maxillae, first 



and second maxillipeds. 

 Fig. 5. Anchorella quadrata, sp. n. Enlarged. 

 Fig. 6, Lernea lusci, nat. size, with various forms of head-processes, 



Plate V. 



Fig. 1. Chrmidr acanthus clavutus, sp. n., $ . Nat. size. 



la. Anterior portion of head, with antennae, lb Male. 

 1 c. Mouth-organs of male. 

 Fig, 2. Anchorella paradara, Van Bened., $ . Nat. size. 



2 a. Male, highly magnitied. 2 b. Mouth, with first and second 

 antennae. 2 c. Maxilla and second maxilliped. 



Plate VL 



Fig. 1. Brachiella mo'luecii, sp. n,, 2- Nat. size. 



1 a. Organ of adhesion. 1 b. Male, enlarged. 1 c. Mouth- 

 organs of male. 1 d. Head of female, much enlarged. 

 1 e. Maxilla of female. 

 Fig. 2. Brachiella insidiosa, Heller, S . Much enlarged. 

 Fig. 3. Brachiella triglee, Claus, J . Much enlarged. 



