110 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



spot distinguish this species from the others of the genus. 

 JVestiooodia nohilis, Baird. (PL XXXIII, fig. 4.) 

 Length 1. mm. Occasionally found in rock pools at 

 Hilbre and Puftin Islands. The one jointed inner branch 

 of the feet of the first pair at once distinguishes this species. 

 Harpacticiis chelifer, Miiller. (PL XXXIII, fig. 5.) 

 Length 1.25 nnn. Common throughout the district as 

 a free swimmer and in dredged material. The chelifate 

 posterior foot jaw (c) clearly distinguishes this species. 

 Harpacticus fulvus, Fischer. (PI. XXXIII, fig. 6. a.b. c.) 

 Length 1.25 mm. Abundant in rock pools at Puffin 

 Island, generally of a bright red colour and very conspicu- 

 ous on the green alga Enteromorpha. 



Prof. Herdman's experiments as to the capacity of this 

 crustacean to adapt itself to various degrees of salt and 

 fresh water are given in Keport III of the Marine Biologi- 

 cal Station on Puffin Island, 1889, p. 36. 



Harpacticus flexus, Brady & Bob. (PI. XXXII, fig. 6.d.e.f.) 

 Length 1.25 mm. Very similar in general appearance 

 and characters to H. chelifer, but smaller and recognizable 

 by the second foot jaw which is slender and without the 

 excavated toothed hand so characteristic of that species. 

 Zaus spinatus, Goodsir. (PI. XXIII, fig. 7.) 

 Length 0.65 mm. A pretty minute species frequently 

 found in tidal pools at Hilbre and Puffin Islands, &c. ; 

 also dredged in Port Erin Bay. 



Zaiis goodsiri, Brady. (PL XXXIII, fig. 8.) 

 Length 1.30 mm. Dredged off the Calf of Man m 20 

 fathoms and off the Little Orme, and in Colwyn Bay. 

 In some of the specimens from the first locality the three 

 central body segments are of a brilliant crimson colour. 

 Alteutha dcpressa, Baird. (PL XXIV, fig. 1. c.) 

 Lengtli 1.30 nnn. Common throughout the district, 

 chiefly a litt(jral s})ocies, also ficriueutly found in tlic inglit 



