1899.] PAEASITIC COPEPODA ON FISHES. 453 



(48) Caligus trichiuri. ( S Kr., $ B.-S.) 



c? . Caligus trichiuH Kr. Bidrag til Kundskab, 1863, p. 46, pi. iv. 

 fig. 2. 



Host : Trichiurus haumela. East Indies. 



5 (?). Caligus longicaudus B.-S. Ann. & Mag. N. H. ser. 7, 

 vol. i. 1898, p. 8, pi. iv. fig. 1. 

 In Coll. Brit. Mus. 

 Hosts : Trichiurus haumela and Chirocentrus dorab. Bombay. 



Division 3. Abdomen with 3 joints. 



(49) Caligus angustatus. $ . 



Caligus angustatus Kr. Bidrag til Kundskab, 1863, p. 84, pi. vii. 

 fig. 2. 



Sub-Gr. Sci^NOPHiLUS Van Beneden. 



Cephalothorax proportionally very small, rounded. Genital 

 segment elongated. Abdomen having a total length equal to the 

 remainder. Second maxillipeds very large, massive ; other limbs as 

 in Caligus. 



(1) SCI^NOPHILUS TENUIS. 5 . • 



Sdcenojohilus tenuis V. Ben. Bull. Acad. Eoy. Belg. xix. 1852, 

 pt. 3, p. 464. 

 „ „ V. Ben. Eecherch. sur les Crust. Belg. 1861, 



p. 118, fig. xxi. 

 „ B.-S. Journ. M. B. Assn. Plymouth, 1896, 

 p. 156. 

 In Coll. Brit. Mus. 

 Host : gills of Scicena aqnila. Europe. 



(2) Sci.ilNOPHlLUS BENEDENI. $ . 



Scicenopliilus benedeni B.-S. Ann. & Mag. N,H. ser. 7, vol. i. 1898, 

 p. 9, pi. iv. fig. 3. 



Host : gills of Scicena diacaniJius. Bombay. 



Gr. 6. Lepeophtheirus Nordm. 



Carapace large, rounded, scutiform. Frontal border without 

 lunulas. Fourth thoracic segment small, simple. Genital segment 

 without plates or lobes. Abdomen projecting, terminating in two 

 caudal plates. Thoracic limbs as in Caligus. 



Division 1. Abdomen consisting of a single joint. 



(1) Lepeophtheirus brachyurus. 5 . 



Lepeophtheirus brachyurus Heller, Eeise d, Novara, 1865, p. 185, 

 pi. xvi. fig. 4. 



Host : gills of Tetrodon ealamaria [T. stellatus], Java. 

 Proc. Zool. Soc— 1899, No. XXX. 30 



