286 Mr. W. Thompson on the Crustacea of Ireland, 



Captain Portlock informs me that this species was taken by deep 

 dredging in Belfast bay in the course of the Ordnance Survey. 



Ebalia Pennantii, Leach, Mai. pi. 25. f. 1 — 6 ; Edw. Crust, t. ii. 



p. 129; Desm.pl. 7. f. 1. 

 Cancer tuberosus, Penn. vol. iv. p. 12. pi. 10. f. 2. 



Although this species must be considered rare, it is less so than 

 the two already noticed — E. Bryerii and E. Cranchii. A specimen 

 (from Cork ?) is in Mr. J. V. Thompson's collection. In Sept. 1836, 

 one was dredged up from deep water in Belfast bay by Mr. Hynd- 

 man, and, subsequently, another was similarly obtained there by 

 Dr. Drummond. Several were procured in the same locality by the 

 collectors attached to the Ordnance Survey, who likewise dredged 

 a specimen in Larne lough. To Mr. G. J. Allman I am indebted 

 for one which he found in Dublin bay. 



Three examples of the E. Pennantii were brought up alive in the 

 dredge from a depth of 50 fathoms off the Mull of Galloway by Capt. 

 Beechey, R.N. See p. 21 of the present vol. 



Atelecyclus heterodon, Leach, Mai. pi. 2 ; Edw. Crust, t. ii. p. 143. 

 A. septemdentatus, Desm. p. 8. pi. 4. f. 1. 



Mr. Templeton notices a crab of this species as found by him 

 V in the stomach of a cod-fish Jan. 17, 1817." In Mr. J. V. Thomp- 

 son's collection is an Irish specimen probably from Cork. In Jan. 

 1839, I obtained a perfect adult male from the stomach of a brill 

 (Pleuronectes rhombus) taken at Ardglass, county Down ; it some- 

 what exceeds in size that figured by Leach, which again is larger 

 than Montagu represents the species ; the hairs are not confined 

 to the arms and legs, the carapace being likewise covered with 

 them. The circumstance of this species being found in the stomachs 

 of the cod and brill would indicate — were we not otherwise informed 

 — its being an inhabitant of deep water. In the Ordnance collection 

 are examples of this crab from Moville (co. Donegal), Portrush, near 

 the Giant's Causeway, and Carrickfergus. Mr. R. Ball has twice 

 obtained it on the Dublin coast : on one occasion many specimens 

 were found by him on the beach at Portmarnock after a great 

 storm. Montagu remarks that several of the A. heterodon which he 

 procured were all males, and Dr. Leach mentions females as ex- 

 tremely rare. The several Irish examples I looked to with reference 

 to their sex, were likewise males. It may be remarked, that in this 

 species the females might, from the very narrow form of the abdomen, 

 be without due attention regarded as males. 



In the month of September 1835, I obtained several small living 

 specimens of Atelecyclus (carapace about 2 lines in length) in rock- 

 pools accessible at low-water at Bangor, county Down. They dif- 

 fer a little in the contour of the shell (which is not so round) and 

 in the form of the teeth between the orbits from the adult A. hete- 

 rodon, but on account of their diminutive size, and in the absence of 

 specimens of all ages for comparison, it would I conceive be rash to 

 consider them otherwise than this species. 



