Mr. W. Thompson on the Crustacea of Ireland. 285 



course will not apply to the allied species P. pinna. On one occa- 

 sion I found a female Pinnotheres, of adult size, alive in a Modiolus 

 vulgaris six days after it had been taken from the sea — the shell-fish 

 died on the fourth day. 



" Pinnotheres pinna." 



In the collection of Mr. J. V. Thompson there is a specimen so 

 named and marked as Irish. It is imperfect, but appears to be the 

 P. veterum of Leach, made synonymous by this author with P. pinna. 

 Writing on Pinnotheres in the 'Entomological Magazine' (vol. iii. 

 p. 89) Mr. J. V. Thompson remarks — " On this part [Cork] of the 

 Irish coast but two species have been hitherto observed, viz. P. pi- 

 sum and P. pinna, the latter being found in Pinna and Modioli." 



Gonoplax angulata, Edw. Crust, t. ii. p. 61. 

 G. bispinosa, Leach, Mai. pi. 13. 



Mr. J. V. Thompson's collection contains an Irish specimen of 

 this crab, marked "rare." Mr. R. Ball has found the species in the 

 stomachs of cod-fish, purchased in the markets of Youghal and 

 Dublin, and commonly in those brought to the former place — four 

 of these crabs is the greatest number he has obtained from the sto- 

 mach of a single fish. In the Ordnance collection is a fine example 

 of G. angulata, labelled as procured at "Bangor [co. Down] , January 

 1839." 



On examination of several specimens of Gonoplax preserved by 

 Mr. Ball, I cannot — judging from Leach's figure of the one and 

 Desmarest's of the other — see any grounds for considering G. angu- 

 lata and G. rhomboidalis as distinct species. My specimens accord 

 better with the latter, but may at the same time be considered in- 

 termediate : instead of the second spine on each side is the little 

 knob or protuberance characteristic of G. rhomboidalis. From the 

 descriptions of the two species there appears to be little more of 

 difference than the relative length of spine — and this certainly is 

 most trivial — on each side of the carapace. 



Ebalia Bryerii, Leach, Mai. pi. 25. f. 12 ; Edw. Crust, t. ii. p. 129. 



The first native example of this species which came under my ob- 

 servation was obtained in the autumn of 1838 by Mr. Hyndman, 

 when dredging in deep water in Belfast bay. In the Ordnance col- 

 lection are two specimens similarly obtained from the same locality 

 in the following year. 



Capt. Beechey, R.N., brought up two examples of this species 

 alive in the dredge from 50 fathoms water off the Mull of Galloway. 

 See p. 21 of the present vol. 



Ebalia Cranchii, Leach, Mai. pi. 25. f. 7 — 11 ; Edw. Crust, t. ii. 

 p. 129. 

 A single specimen was dredged from deep water in Roundstone 

 bay, Connemara, by our party in July 1840. Mr. R. Ball subse- 

 quently found several on the beach at Portmarnock after a storm. 



