16 Oti some new Parasitic Copepods on Fish. 



Fig. 2. Male of same. 



2 a. Anterior portion of cephalotliorax. 2 b. Hamulus. 2 e. Pos- 



terior antenufe. 2(1. Last joint of first maxilliped. 

 2/. Second luaxilliped. 

 Fig.Z, Calic/Ks cyhii, 5, sp. n., enlarged. 



3 a. Anterior portion of cephalothorax. 3 b. Furcula. 3 c. First 



pereeopod. 3 rf, e,f. Second, third, and fourth perajopods. 

 3 h. Caudal plate. 



Plate HI. 



Fig. 1. Caligus hirsufus, $, enlarged. 



1 a. Anterior portion (if cephalothorax. 1 /;. Furcula. 1 c. Last 

 joint of fourth pera^opod, higlily magnified. Id. Caudal 

 plate. 

 Fig, 2. Male of same, enliirged. 

 Fig. 3. Caligiis IViipsoni, 5, sp. n., enlarged. 



8(1. Anterior portion of cephalothorax. Sb. Caudal plate. 

 3 c. Second maxilliped. '3(1. Fourth pcrceopod. 3e. Furcula. 

 JPig. 4. Male of same. 



Plate IV. 



Fig. 1. Caligus hngicmidus, 2 , sp. n., enlarged. 



1 a. Cephalothorax from beneath. 1 h. Furcula. 1 c. Fourth 



per£eopod. 1 d. Angle of genital segment and fifth peraeo- 

 pod. \e. Caudal plate. 1/. Third peroeopod. 

 Fig. 2. Male of same. 



2 b. Second antennae. 2 c. Second maxilliped. 

 Fig. 3. Caligus (^Scicniophilus) Bcnedeni, $. 



3 a. Cephalothorax from below. 3 b. Fourth peraeopod. 



3 c. Caudal plates. 3 d. Second maxilliped. 



Plate V. 



Fig. 1. Ilellcria annata, $, gen. et sp. n. 



1 a. Cephalothorax from beneath, much enlarged. 1 b. Seen 



from the side. 1 c. Margin of second maxilliped. \d. Mouth- 

 organs. 1 e,f, g. First, second, and third peraeopods. 

 1 h. Anterior antennce, much enlarged. 

 Fig. 2. Male of same. 



2 a. Cephalothorax from beneath, much magnified. 26. Caudal 



extr'miity. 2 c. Caudal appendage. 2 d. Second antenna), 

 terminal joint. 2f. Lower lip and one of the styles. 



Plate VL 



Fig. 1. BrachieJla appetidiculosa, $, much enlarged, seen from side. 



1 a. Organ of adhesion. 

 Fig. 2. Ditto, seen from underneath. 

 Fig. 3. Male of same. 



3 a. Mouth-organs. 3 b. Antennae. 3 c, d. First and second 



maxillipeds. 

 Fig. 4. Chondracanthus elongafus, $ , much enlarged, from underneath. 

 Fig. 5. Ditto, seen from side. 

 Fig. G. Male of same, highly magnified. 



6 a, b. First and second maxillipeds. 



