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 falax^ Heller, 

 in form except for the great size of the abdomen. 



EXPLANATION OF THE PLATES. 



Plate IIL 



Fig. \. Califju^ brenipedis, sp. n., 2 . X G. 



a\. Frontal plate with anterior antenna, a 2. Posterior an- 

 tenna. Ha. Hamulus subsidiarius anterior. Md. Mandible 

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

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

 mentary lifth perajopod. C.P. Caudal plate. 

 Fig. 2. Caligus scomberi, sp. n., 2 . X 6. 



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

 C. Caudal plate. 



Plate IV. 



Fig. 1, Lepeophtheirm jJollacMus, SY).x\., ?. X 6. 



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



F. Furcula. 4 P. Fourth peraiopod. 

 Fig. 2. Caligus obsmrus, Baird, $ . X (5. 



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



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



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

 Fig. 3, Ehjtrophiora brachyptcra, Gerstaecker, $ S in situ. 



3 a, 3 b. Spermatophores detached. 



Fig, 4. Mouth of Chondracanthus trigke, §, X 20, showing maxillaa, first 



and second maxillipeds. 

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

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



Plate V. 



Fig. 1. Chrmidracanthus davutus, sp. n., 2 • ^^^t. size. 



1 a. Anterior portion of head, with antennae. 1 b Male. 



1 c. Mouth-organs of male. 

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



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



antennae. 2 c. Maxilla and second maxilliped. 



Plate VI. 



Fig. 1. BrnchieUa mo'luccii, sp. n,, 2- ^'at. size. 



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

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

 1 e. Maxilla of female. 



Fig. 2. Brachiella insidiosa, Heller, c? • Much enlarged. 



Fig. 3. JJrachiella triglce, Claus, J ■ Much enlarged. 



