1899.] PABASITIC COPEPODA O^T FISHES. 475 



(1) PSEUDOCLAVELL.V OVALIS. $ . 



Pscudoclavella ovalls B.-S. Ann. & Mag. N. H. ser. 7, vol. ii. 

 1898, p. 95, pi. vi. fig. 1. 

 In Coll. Brit. Mus. 

 Host : gills of Serranus sp. Muscat. 



Gr. 11. PsEUDOOYCNus Heller. 



Head oval. Thorax with three segments, bearing small lateral 

 lobes. Genital segment long (3 times that of cephalothorax). 

 Abdomen short, broad. Caudal appendages very small, simple. 

 Anterior antennae 3-joiuted. Posterior antennae small, uncinate. 

 Second maxillipeds as moderately strong biarticulate hooks. Five 

 pairs of rudimentary limbs ; the fii-st and third uniramose, the 

 second biramose ; fourth and fifth minute, stump-like; the last 

 rising from the posterior extremity of the genital segment. 



(1) PSEUDOCYCNUS APPEKDICULATUS. $ . 



Pseudocyciiits appendiculatus Heller, Reise d. JN'ovara, 1865, 



p. 218, pi. xxii. fig. 7. 

 „ „ B.-S. Ann. <fe Mag. N. H. ser. 7, 



vol. ii. 1898, p. 368. 

 Hosts : gills of Ooi'i/jiJueaa and Thynniis macroj^terus. Aden. 



G. 12. Cycnus M.-E. (Gongericola V. Ben.) 



Head rounded. Two distinct free thoracic segments without lobes 

 or caudal plates. Genital segment oval. Abdomen short. Caudal 

 plates small, setiferous. Anterior antennae 6 jointed. Posterior 

 antennae 2-jointed, uncinate ; second maxilliped slender. Pour 

 pairs of rudimentary thoracic limbs, all biramose. 



(1 ) Cycnus geacilis. $ . 



Cycnus c/meilis M.-E. Hist. Nat. Crust, iii. 1840, p. 496, pi. xli. 

 fig. 1. 

 „ „ Heller, Reise d. Novara, 1865, p. 216, pi. xxii. 

 fig. 6. 



Host : Gadus ? Adriatic. 



(2) Cycnus pallidus. § c? . 



Gongericola pallida V. Ben. Bull. Acad. Eoy. Belg. t. xxi. pt. 2, 

 1854, p. 583. 

 „ „ V. Ben. Mem. Acad. Eoy. Belg. xxxiii. 1861. 



p. 148, pi. xxiii. 

 Cycnus pallida B.-S. Journ. M. B. Assn. 1806, p. 159. 

 In Coll. Brit. Mus. 

 Host : gills of Conger vulgaris. European seas. 



