of the Fishery Board for Scotland. 



157 



to the fins of ;i porbeagle shark brought to the Fish Market at Aberdeen.* 

 The specimen figured (fig. 32) measured from the front of the head to the 

 end of the caudal furca about seven-sixteenths of an inch (11mm.), and 

 the ovisacs, which were slender, were fully four times the length of the 

 body — about two and one-quarter inches altogether. 



The dorsal plates are adorned with small impressed circular marks, 

 forming a more or less regular pattern, and this, together with the form 

 of the plates, gives to them a fairly close resemblance to the elytra of 

 certain coleopterous insects. This species appeared to be less frequent 

 than the Dinematura producta already recorded. 



Genus Cecrops, Leach (1816). 



Cecrops latreillii, Leach. 



1816. Cecrops latreillii, Leach, Ency. Brit. Suppl., vol. i., 

 p. 20, figs. 1-5. 



1850. Cecrops latreillii, Baird, op. cit., p. 293, PI. XXXIV., fig. 1. 

 1892. Cecrops Idtreillii, A. Scott, Trans. Nat. Hist. Soc. 

 Glasgow, vol. iii., Part III., p. 266. 



Several specimens of Cecrops were obtained on a short sun-fish, 

 Ortliagoriscus mola, captured in the Firth of Forth in October 1890. 

 They were found adhering to the gills of the fish, and do not appear to be 

 very uncommon on this species of Ortliagoriscus. One or two specimens 

 were taken from the gills of a sun-fish captured 14 miles east from 

 Lerwick, Shetland, on 17th August 1893. The specimens recorded by 

 Dr. Baird, which were obtained on sun-fishes captured at different parts 

 of the coasts of England and Ireland, were also taken from the gills. 



Genus Pandarus, Leach (1816). 



The principal generic characters of Pandarus are,' according to Dr. 

 Baird, as follows : — (1) Several pairs of lamellar, elytraform appendages. 

 (2) All the thoracic feet fitted to a certain extent for walking and armed 

 near their extremities with short and thick hooks. There appears to be 

 but one British species of Pandarus, viz., P, bicolor. The Pandarus boscii, 

 described by Dr. Leach and Dr. Baird, is now considered to be a form of 

 P. bicolor; iudeed, Dr. Baird himself suggests that P. boscii is 

 "only a variety" of the more common species. 



Pandarus bicolor, Leach. (PI. VI., figs. 33-38.) 



1816. Pandarus bicolor, Leach, Ency. Brit. Suppl., vol. i., p. 405, 



PI. XX., figs. 1-2. 

 1850. Pandarus bicolor, Baird, op. cit., p. 288, PI. XXX, fig. 10. 



Several specimens of Pandarus bicolor have been obtained during the 

 past autumn on sharks which have been brought to Aberdeen Fish Mar- 

 ket, and known by the name of tope or topers, Galeus canis. The 

 parasites were found for the most part adhering to the fins of the topers, 

 and less frequently on other parts of the fish. 



The specimen figured measured about two-fifths of an inch in length, 

 exclusive of the ovisacs, which were long and slender (fig. 33). The 

 dorsal surface was adorned with dark chocolate-coloured blotches arranged 

 somewhat as shown in the drawing. 



The female antennas are ymall and somewhat rudimentary ; they are 



* The specimens of Echthrogaleus coleoplratus recorded by Dr. Baird were obtained by 

 Dr. Johnston also from a porbeagle shark captured in Berwick Bay. 



