4G MISS MAT E. BAINBRIDGE ON 



1900. Bomolochus solece, T. Scott, ibid. 18th, p. 146. 



1900. Bomolochus solece, A. Scott, 14th Ann. Kept. Liverpool Marine Biol. Com. Dec. p. 12. 



1900. Bomolochus solece, A. Scott, Trans. Liverp. Biol. Soc. vol. xiv. p. 139. 



1901. Bomolochus solece, T. Scott, 19th Ann. Rept. Fish. Board Scot. iii. p. 121. 



1902. Bomolochus solece, T. Scott, ibid. 20th, p. 288. 

 1905. Bomolochus solece, T. Scott, ibid. 23rd, p. 108. 



This parasite seems to be very common in the nostrils of the Cod {Gadus morrhua) 

 {cf. A. Scott). T. Scott (1893) gives a short account and some figures of this species. 

 Ilis figure (pi. 5. fig: 3) of the second antenna does not seem to be quite correct. This 

 appendage (PL 8. fig. 3, A. 2 ) is three-jointed. The basal joint articulates with a chitinous 

 plate, with which the mandible and first maxilla are also articulated (fig. 3, Ch.p.). Prom 

 the inner margin of this plate a chitinous rod springs which runs inwards and forwards 

 and is united to the front lip, which is stiffened at this point by a chitinous knob. The 

 second joint is quite short and forms the elbow of the appendage, which is doubled back 

 on itself ; it bears two small setae. The terminal joint is nearly as long as the basal 

 joint and is very elaborate. There is a broad portion, which ends in a sort of paddle and 

 is covered with short spines. At the outer side of this, about the middle of its length, is 

 a strong sword-shaped blade, the outer edge of which bears a fringe of thick pectinate 

 setae. Close to the base of the blade is a strong curved claw (?) or seta. Three longer 

 and more slender setae lie between the blade and paddle. There are also two finer setae 

 on the inner side of these. This appendage is the same in both sexes. 



The Mandible (PI. 8. fig. 4, lid.) has a long tooth and one much smaller at its side, 

 and agrees closely with the mandible of a variety of this species found in the nostrils of 

 the Ling, Molva molva (Linn.), which T. Scott describes and figures {op. cit. 1902, 

 p. 288, pi. 22. fig. 16). 



Behind the first maxilla and between it and the second maxilla is an oval chitinous 

 structure with a stout base (fig. 4, S.I.); the oval portion is covered with fine hairs. 

 Claus, in his account of this sj>ecies {op. cit. 186-1, p. 375), describes and figures 

 (pi. 35. fig. 18 c?) a chitinous plate to which he says the palp (maxilla) appears to 

 belong ; this figure does not agree with mine ; but on the same plate (fig. 23 b) is a figure 

 of the mouth-parts of Bomolochus cornutus, and in this he shows a structure very similar 

 to that observed in B. solece. Claus describes it as " the maxilla-plate with palp." 

 Giesbrecht, in his account of the " Paragnathe " of the Copepoda {op. cit. 4, p. 75), gives 

 his reasons for regarding similar structures in the Hersiliidse and other Copepoda 

 as lateral outgrowths of the lower lip and he calls them, therefore, side lips 

 (Seitenlippen). There can be no doubt, I think, that this is the true explanation of 

 these structures in Bomolochus solece — i. e., they are outhrowths of the lower (hind) lip, 

 and are morphologically quite distinct from the first maxilla. Giesbrecht considers that 

 the correct terms to use for the parts of the mouth are fore lip (Vorderlippe), hind lip 

 (Hinterlippe), and side lip (Seitenlippe). The specimen from which the drawings were 

 made measured 1*53 mm. 



Thp Male (PL 8. fig. 2) is much smaller, one specimen measured - 7l mm., another 

 •8 mm. As the male has apparently not been figured before, a drawing of it, enlarged to 



