Land, Fresh- Water, and Marine Crustacea. 313 



with the dredge. This species frequents the fronds of 

 Laminaria and other seaweeds, to which it can adhere very 

 firmly; and from its colour and very flattened form it is, 

 though not uncommon, easily missed unless the weed be 

 carefully examined. 



Genus (34) Aspidiscus, Norman, 1868. 



68. Aspidiscus littoralis, G. 0. Sars. 



1880. Scutellidium fasciatum, G. S. Brady (not Norman), Mono- 

 graph, vol. ii. p. 178, pi. lxviii. fig. 11; pi. lxix. figs. 

 1-9. 



1904. Aspidiscus littoralis, G. 0. Sars, I. c, vol. v. p. 79, pis. xlvi. , 

 xlvii. 



Hab. — This species was obtained very sparingly in a shore 

 gathering near the mouth of the estuary. 



Genus (35) Tisbe, Lilljeborg, 1853. 



69. Tisbe fur cat a (Baird). 



1837. Cyclops furcatus, Baird, Mag. Zool. and Bot., vol. i. p. 330, 



pi. ix. figs. 26-28. 

 1850. Canthocamptus furcatus, idem, Brit. Entomostraca, p. 210, 



pi. Xxv. figs. 1 and 2; pi. xxx. figs. 1-6. 

 1863. Tisbe furcata, Claus, Die frei-lebenden Copepoden, p. 116, 



pi. xv. figs. 1-10. 

 1880. Idya furcata, G. S. Brady, I, c, vol. ii. p. 172, pi. Ixvii. figs. 



1-11. 



Hab. — Various parts of the estuary. Common, especially 

 within the littoral and laminarian zones. 



70. Tisbe gracilis (T. Scott). 



1895. Idya gracilis, T. Scott, Thirteenth F. B. Rept., pt. iii. p. 171, 

 pi. iv. figs. 13-21. 



Hab. — -In an old quarry at Granton, open to the sea; rare. 

 Collected by hand-net near low -water. 



Genus (36) Thalestris, Claus, 1863. 



71. Thalestris longimana, Claus. 



1863. Thalestris longimana, Claus, Die frei-lebenden Copepoden, 

 p. 130, pi. xviii. figs. 1-11. 



Hab. — In rock pools near high-water on Cramond Island ; 



