LEPEOPTHEIRUS. 275 



Salmo criocV, December. Off a salmon, at a salmon- 

 leap on the river Bush, near Giant's Causeway, June 

 1837; and at Cushendale, April.* From the sea-trout, 

 Donaghadee, April ; f W. Thompson, Esq. 



2. LEPEOPTHEIRUS PECTORALIS. Tab. XXXII, fig. 10. 



LERN^EA PECTORALIS, Miiller, Zool. Dan. i, 41, t. 33, f. 7 ; En- 

 cyclop, method., Vers, t. 78, f. 12. 

 CALIGUS PECTOEALIS, Kroyer, Tidsskrift, ii, 8, t. 6, f. 4. 



M. Edwards, Hist. Nat. Crust., iii, 454, No. 9. 



Thompson, Ann. and Mag. Nat. Hist., xx, 247- 

 LEPEOPTHEIRTJS PECTORAXIS, Nordmann, Mikr. Beitr., ii, 30. 

 PECTORAL LERN^EA, Shaw, Nat. Miscell., viii, t. 295. 



Description. Female. Carapace oval. Frontal plates 

 small, notched in centre. Antennae small. Thorax fully 

 as long as carapace. Penultimate joint very narrow ; last 

 joint nearly as large as carapace ; almost quadrilateral, 

 and slightly lobed at posterior extremity. Abdomen short. 

 Caudal plates small ; terminal setae short. Sternal fork, 

 with simple, sharp-pointed branches. Third pair of foot- 

 jaws large. Fourth pair of feet small. 



Hab. Belfast Bay, W. Thompson, Esq. Off the floun- 

 der, John-dory, mackerel, dab, and sole, in March. The 

 gemmous dragonet (Cattionymus tyro), W. Yarrell, Esq. 



3. LEPEOPTHEIRUS NORDMANNII. Tab. XXXIII, fig. 1. 



CALIGUS NORDMANNII, M. Edwards, Hist. Nat. Crust., iii, 455, No. 10; 



Atlas Regne An. de Cuv., edit. Crochart, 

 Crustac., t. 77, f. 1. 

 Thompson, Ann. Mag. Nat. Hist., xx, 248. 



Description. -Female. Carapace rounded oval, nearly 

 as broad as long, diaphanous. Frontal plates of consi- 



* Amongst these specimens were two or three males, and in oiie instance 

 the male was firmly attached to the female by his strong third pair of foot- 

 jaws. 



f Some of these specimens were of a reddish hue, and shone with a metallic 

 lustre. 



