374 Transactions. — Zoology. 



thoracic part of the body thin, elongated, and somewhat worm- 

 Hke. The head therefore seems placed at the end of a long 

 neck. The mouth is at the extremity of this neck, and is 

 formed of a conical rostrum or i:)roboscis, at the sides of which 

 are the free maxillary palpi. The antennae of the first pair are 

 indistinctly recognizable ; those of the second pair are pro- 

 duced as more or less hooked organs at the sides of the ros- 

 trum. Behind these are placed the hooked foot- jaws of the 

 first pair. The arm-like second pair are free up to the point 

 and rather long. The genital segment is thick and bag-like, 

 and either oval or quadrate in form. It bears one or two pairs 

 of tube-like posterior lobes or appendages. The oviferous 

 tubes are considerably elongated. 



"&' 



1. Brachiella ^;«rA"cr/, n. sp. Plate XXVIII. , fig. 8, a 

 and h. 



Head and thorax rather stout, about 2mm. in diameter 

 and 8mm. long, forming a nearly-continuous line with the 

 arm-like appendages, and bent at right angles to the genital 

 segment. Rostrum long and conical, considerably exceeding 

 the antennse. The latter organs end in a rounded lobe, and 

 have a small pointed joint protruding near their outer ex- 

 tremity. The maxillary palps are 2-jointed, and are directed 

 backwards and outwards. About 3mm. from the extremity 

 of the cephalothorax stand a pair of conical protuberances 

 which show no distinct segmentation : these probably repre- 

 sent the foot-jaws of the first pair. The arms (modified foot- 

 jaws of the second pair) are 17mm. long, and end in a large 

 dark-coloured disc about 3mm. in diameter. The genital 

 segment is pyriform and slightly compressed in shape, being 

 about 11mm. long, 7mm. broad, and 5mm. deep from back to 

 front. At its base and on each side of the anal papillae two 

 long, narrow, terete appendages about 10mm. long project 

 downwards. The oviferous tubes are long and toleral)ly 

 straight. 



The total length of the animal from the bend of the thorax 

 to the extremity of the oviferous tubes is 33mm. ; that of the 

 tubes alone is 21mm. 



Hah. Found on the gills of the skate {Baja nasuta), and of 

 a stingaree, Trygon sp. (Otago Museum.) 



I have named the species after Professor T. J. Parker, to 

 whom I am indebted for much of the material referred to in 

 tlie paper. 



It is evident from the list of the fishes from which the 

 foregoing species of parasites were taken that the kinds wdiich 

 are chiefly brought into the various markets by fishermen have 

 hardly yet been examined with the ol)ject of ascertaining what 



