BRACHIELLA OVALIS. 211 



gurnardus. Moray Firth, in April and May 1900 (T. 

 Scott}. Irish Sea (A. Scott). Apparently more fre- 

 quent on young fishes than on adults. Both Kroyer 

 and P. J. van Beneden record this Brachiella from 

 Trigla gurnardus. 



7. Brachiella bispinosa Nordmann. 

 (Plate L, fig. 9 ; Plate LXIV, fig. 9.) 



1832. Brachiella bispinosa Nordmann. (89) p. 94, pi. viii, figs. 4-7. 



1840. Hrachiella bispinosa M. Edwards. (43) p. 513. 



1877. Brachiella bispinosa C. Vogt. (142) p. 456. 



1901. Brachiella bispinosa T. Scott. (113) p. 132. 



1906. Brachiella bispinosa Norman & T. Scott. (88) p. 220. 



Female. Cephalothorax narrow, rather shorter than 

 the. genital segment and usually more or less doubled 

 back upon it. Genital segment seen from above 

 oblong or somewhat lyre-shaped, nearly twice longer 

 than broad ; posterior end broadly rounded, not 

 angular, and provided with two small submedian 

 spiniform appendages. 



Antennules short, slender, and composed of three 

 or four joints. First maxillipeds strongly uncinate. 

 Second maxillipeds scarcely reaching to the end of 

 the cephalothorax, free but united at the apex to a 

 round chitinous knob. Length about 8 mm. 



We have not seen the male of this species, but 

 Dr. Bassett-Smith states that it resembles the male of 

 Thijsanote impudica (Nordmann).* 



Habitat. Parasitic on the gill-arches of Trigla 

 spp. Plymouth, on Trigla cuculus, Trigla gurnardus, 

 and Trigla lyra (Bassett- Smith). Moray Firth, on 

 Trigla sp. (T. Edward: 'Museum Normanianum '). 



8. Brachiella pastinaca P. J. van Beneden. 

 (Plate LXIV, fig. 8.) 



1851. Brachiella pastinaca P. J. van Beneden. (11) p. 118, pi. 4, figs. 8. 9. 



1877. Brachiella pastinaca Knrz. (71a) Zeitsclir. f. wiss. Zool., vol. 

 xxix. pis. 25, 26, 27, figs. 2, 3, 36, 45. 



1880. Brachiella pastinaca A. Valle. (141a) Boll. Soc. Adriat. Sc. 

 Nat., vol. iv, fasc. i, p. 77. 



1904. Brachiella pastinaca T. Scott. (115) p. 278. 



* ' Journ. Mar. Biol. Assoc.' (N.S.), vol. iv, No. 2 (February 1896), p. 163. 



