BKACHIEf.LA TRIGL^l. 209 



5. Brachiella triglse Glaus. 

 (Plate LXII, fig. 1 ; Plate LXIII, figs. 21-25.) 



I860. Brachiella triglx Glaus. (30a) Wiirzburger naturwiss. Zeitschr 

 vol. i, p. 32, pi. i, fig. 6. 



1877. Anclwrella triglx Kurz. (71a) Zeitschr. f. wiss. Zool., vol. xxix, 

 p. 404, pi. xxv, figs. 13-15. 



1896. Brachiella triglx Bassett- Smith. (7) p. 163. 



1901. Brachiella triglse T. Scott. (113) p. 133, pi. vii, figs. 24-29. 



Female. Small but moderately stout; cephalo- 

 tliorax moderately short and flexuose ; somewhat 

 vermiform, and about as long as the genital segment. 

 Genital segment considerably expanded, the width 

 being rather greater than the length ; lateral margins 

 more or less irregularly lobate, and the postero-lateral 

 produced into bluntly-rounded lobes; also provided 

 with two short posterior appendages, situated one on 

 each side of the nearly obsolete abdomen. 



Antennules short, tapering, and composed of four 

 joints, end joint rather longer than the preceding one. 

 Antennae moderately short and stout, the end joint 

 with a small terminal spike ; outer ramus very short, 

 biarticulated, and bearing two or three minute apical 

 spines. Mandibles slender and obliquely truncated, 

 the truncated margin being rather coarsely serrated ; 

 maxillas moderately stout, bearing three elongated 

 apical spines, and two others at the end of a small 

 lateral process. First maxillipeds short, robust, and 

 provided with small terminal claws. Second maxilli- 

 peds very short and stout, free except at the tips, 

 where they are joined to a chitinous horn-coloured 

 disk. Length about 4*5 mm., varying slightly in 

 different specimens. 



Male. We have not observed the male of this 

 species, but Dr. Bassett-Smith has figured one which 

 apparently does not differ much from the males of 

 other species of Brachiella,. 



Habitat. Parasitic on the gills and gill-arches of 

 Trir/Ja spp. On Trial a gurnardus, cuculus, and // irundo 

 at Plymouth (Basseti- Smith). On Trigla lin-eata, Firths 

 of Forth and Clyde (7 T . Scott). It has also been 



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