5 2 MISS MAT E. BAINBEIDGE ON 



of this claw is a small papilla with a single hair. Near the base of the terminal joint is 

 a small seta. 



First Maxillipeds. — Short and separate along their whole length. At the base of 

 the cup-shaped organ of attachment they are united. The parasite was so firmly 

 fastened to its host that it was necessary, in order to obtain the specimen undamaged, to 

 cut away some of the tissue of the host. The structure of the tenaculum will be 

 described in another paper. 



mm. 



Length (without posterior process) 5'5 



„ of posterior process 2 



Kurz gives 8 mm. as the length of his specimen, but he does not say whether this 

 measurement includes the posterior processes or not. 



(?) Brachiella parkeri, Thompson. (PL 9. figs. 16-17 ; PI. 10. figs. 18-23.) 



1889. Brachiella parkeri, Thompson, Trans. New Zealand Inst. vol. xxii. p. 374, pi. 28. 

 figs. 8 a, b. 



One specimen of what I take to be this species, or one closely allied to it, was obtained 

 from the gills of the Long-nosed Skate (Maia oxyrhynchus) in May. It was a female 

 without ovisacs. The parasite was so firmly attached to its host that it was only 

 dissected out with great difficulty. 



General Appearance (female). 



The position of this creature is very remarkable (PL 9. fig. 16), the head 

 being bent backwards almost at a right angle with the body, so that the head 

 and first maxillipeds are nearly in a straight line. The arms are very long aud 

 slender, almost the same thickness throughout their length, and only tapering 

 slightly at the distal ends, where they are united in a disc-shaped tenaculum deeply 

 imbedded in the tissue of the host. The head to the bend of the neck measures more than 

 half the length of the neck and genital segment together. The neck is slender and 

 short, passing gradually into the genital segment. Prom the ventral surface this 

 portion of the body is somewhat bottle-shaped, widening posteriorly. Near the hinder 

 margin the sides curve in, ending in two short lobes. The abdomen, which is roughly 

 square, lies between these lobes and projects a short distance beyond the genital segment. 

 On its dorsal surface near the sides are two stout processes borne on very short stalks. 

 On the ventral surface of the abdomen two indistinct segments can be made out : the 

 anterior is the shorter of the two and has a small thick-lipped slit down the centre. At 

 the sides and slightly posterior to this slit are two knobs ; between the raised folds of 

 these lie the genital openings (PL 10. fig. 22, G.O.). The posterior segment is bluntly 

 rounded and has a slit down the centre, the opening of the anus (PL 10. fig. 22, a.). In 

 the preserved specimen it was not possible to determine with certainty whether the two 

 slits were continuous or not. 



The head is elongated, wider posteriorly, and becoming narrower towards the anterior 

 end, where it is bent over so that the mouth-tube is on the ventral surface. The dorsal 

 surface of the head is flattened. At the anterior end, where it is bent over, is a small 

 prominence with uneven edges (PL 9. fig. 17, x) ; the first pair of antennas, which are 



