248 Mr. W. Thompson's Additions to the Fauna of Ireland. 



This species is brought under the genus Lepeophtheirus by Nord- 

 mann (Mikrog. Beitrage, p. 30), but Kroyer writing on it subse- 

 quently calls it Caligus. M. Edwards marks Muller's Lernea pecto- 

 ralis, Zool. Dan. tab. 33. f. 7, with doubt as being identical with that 

 of the two authors quoted. 



39. Caligus Nordmanni, Edw. vol. iii. p. 455. and Reg. Anim. 



pi. 77. f. 1, 

 I have procured on Gadus morrhua brought to Belfast market in 

 March, November and December 1837. M. Edwards notes this 

 species as found at Nice on the skin of a u Mole " [Orthagoriscus 

 mold] . 



40. Caligus vespa, Edw. vol. iii. p. 456, 



I have found on Salmo trutta taken in Dundrum bay (co. Down), 

 Aug. 1836, and on the same species captured in the sea at Dona- 

 ghadee in March ; on Salmo eriox from the latter locality in Dec. ; 

 on Salmo salar taken on ascending two of the co. Antrim rivers from 

 the sea in June and July. M. Edwards indicates this species merely 

 as found in the gills of a salmon. C. vespa was noticed this year for 

 the first time as found on the English coast. See British Museum 

 Crust, p. 118. 



41. Caligus sturionis, Kroyer, Tidssk. bind i. tab. 6. f. 6. (" Ex- 

 plication" of tab. p. 628) ; Edw. vol. iii. p. 457* — 



I obtained on Trigla hirundo and T. pini brought to Belfast market in 

 November 1839. 



42. Trebius caudatus, Kroyer, Tidssk. bind ii. p. 30. tab. 1. f. 4. 

 (Explication of tab. p. 104) j Edw. vol. iii. p. 458*. 



This truly generic form was obtained by Kroyer on a Squalus galeus 

 taken in the Kattegat. My specimens — both male and female — were 

 found adhering externally over both sides of the body of a Rata batis 

 captured in Belfast bay in September 1838. 



Order Lerneada. 



43. Chondr acanthus gibbosus, Kroyer, Tidssk. bind i. p. 252. 

 tab. 2. f. 4. 



Taken in the pouches of a Lophius piscatorius in Dublin, December 

 1839 (W. T.), and from pouches of three individuals captured in 

 Belfast bay, November 1841. M. Edwards brings this species with 

 doubt under C. Delarochiana (Cuv. Reg. Anim.), which has been 

 found on the tunny, Thynnus vulgaris. C. Lophii, Johnston, Lou- 

 don's ■ Mag. Nat. Hist.' ix. 81. f. 16, already recorded in the 

 ■ Annals ' (vol. v. p. 257) as Irish, seems to me identical with C. gib- 

 bosus, Kroyer. 



44. Lernaopoda galei, Kroyer, Tidssk. bind i. tab. 3. f. 5, a — /; 

 Edw. vol. iii. p. 516 * — 



was found by its describer on the fin of a Squalus galeus, Linn. ; 

 * Kroyer only quoted. 



