EEVISED REPOin^ ON L.M.B.C. CUPEPODA. 109 



TJialestrls harpactoides, Glaus. (PI. XXII, fig. 8.) 

 Length 1.25 mm. Frequent in rock pools about Puffin 

 Island and Douglas. This rarer species somewhat resem- 

 bles T. nifocincta in colour. It is however more slender 

 and may be recognised by the aculeate character of its 

 caudal setae. 



Thalestris claicsii, Norman. (PL XXII, fig. 6. b. c.) 

 Length 1 mm. Found in tidal pools at Flesh wick 

 Bay, Isle of Man, and at Puffin Island. The first pair of 

 swimming feet serve to distinguish it. 



Thalestris riifo-violescens, Glaus. (PI. XXIII, fig. 1.) 

 Length 1. mm. A rare species in the district. A few 

 specimens w^ere found in mud dredged from 4 fathoms in 

 Port Erin Bay. The chitinous character of the edges of 

 most of its segments is a very distinguishing feature. 

 This is specially noticable on the joints of the anterior 

 antennae (a) and in the fifth feet {d). 



Thalestris serrulata, Brady. (PI. XXIII, fig. 2. a.) 

 Length 2. mm. One specimen was taken by surface 

 tow^net off Puffin Island. The widely separated serrated 

 markings on the outer edge of the caudal segments (a) 

 seem a strong distinguishing feature. 



Thalestris hibernica,BTSi.dj&Boh. (Pl.XXIII,fig.2.5.— /.) 

 Length 0.80 mm. A few specimens w^ere found in rock 

 pools at Hilbre and Puffin Islands. It may be recognized 

 by the fifth feet (e). 



Thalestris longimaria, Glaus. (PI. XXIII, fig. 3. a. h.) 

 Length 1.30 mm. Gommon in rock pools at Hilbre 

 and Puffin Islands. The pow^erful posterior foot jaw 

 renders it easily recognizable. 



Thalestris peltata, Boeck. (PI. XXXIII, fig. 3. c. d.) 

 Length 0.80 mm. A few specimens were found in 

 material dredged off Little Orme and more recently at 20 

 fathoms off Port Erin. Its ovate form, rostrum and eye 



