366 Proceedings of the Royal Physical Society. 



271. Monstrilla gracilicaiida, Giesbrecht. 



1892. Monstrilla gracilicauda, Giesb., I. c, p. 587, pi. xlvi. figs. 9, 



16, 18 et seq. 

 1904. „ ,, T. Scott, Twenty-second F. B. Rapt, 



pt. iii. p. 245, pi. xiii. figs. 8-10; 



pi. xiv. fig. 15. 



Hah. — Taken with tow-net above Queensferry, 26th June 

 1890; and off' Musselburgh, 29th September 1892. Also 

 captured east of May Island on 20th August 1903. All the 

 specimens were females. 



272. Monstrilla diibia, T. Scott. 



1904. Monstrilla diihia, T. Scott, Twenty-second F. B. Rept., pt. iii. 

 p. 247, pi. xiii. fig. 14; pi. xiv. figs. 16-18. 



Kah. — This species was captured east of Inchkeith on 14th 

 August 1891, and is apparently rare. It resembles Monstrilla 

 Dance, Claparede, but that author shows only three setae 

 instead of four on each f ureal joint ; there are also one or 

 two other differences. 



Genus (119) Thaumaleus, Kroyer, 1849. 



273. Thaumaleus rigidus (I. C. Thompson). 



1888. Cyinhasoma rigidum, I. C. Thompson, Jour. Linn. Soc, (Zool.), 



vol. XX. p. 154, pi. xiii. figs, 1-4. 

 1892. Thaumaleus Claparedei, Giesb,, op. cit., p. 381, pi, xlvi. 



figs. 5, 15, 21, 26. 

 1904. ,, rigidus, T. Scott, Twenty-second F. B. Rept., 



pt. iii. p, 248, pi. xiii. figs. 15-17; pi. xiv. 



fig. 19. 



Hah. — Captured off St Monans, by tow-net, on 6th 

 September 1890 ; apparently rare. 



Division CALIGOIDA. 



Family Caligid^. 



Genus (120) Caligus, 0. F. Miiller, 1785. 



274. Caligus curtus, Miiller. 



1785. Caligus curtus, Miiller, Entomostraca, p. 130, pi. xxi. fig. 1. 

 1850. ,, diaphanus, Baird, British Entomostraca, p. 269, 



pi. xxxii. fig. 1 ( (J ). 

 1850. ,, MilUeri, idem, I. c, p. 271, pi. xxxii. figs. 4 and 5, 



Hah. — Frequent on different kinds of fishes, especially 



