ON THE MARINE ZOOLOGY OF THE IRISH SEA. 325 



' Bactylopus rostralus (T. Scott). — A single specimen was obtained 

 among some dredged material collected at Port Erin by Professor 

 Herdman, Easter, 1894. 



' Pseudanthessius Scmvagei (Canu). — A few specimens were obtained 

 by washing a number of Spatangiis pur^nire^is which were trawled in 

 the central area, 21 miles W.N.W. from Morecambe Bay Lightship, on 

 April 3. This rare species was only added to the British fauna last year, 

 when it was found in the Firth of Forth, and the present is the second 

 time it has been observed in the British area.' 



Mr. Thompson reports as follows : — 



' Eleven species of Copepoda new to the district have been recorded 

 during tlie past year, viz., Cyclops magnoctavus, Cragin ; Cyclops Ewarti, 

 Brady ; Caiiuella perplexa, Scott ; Ameira longicandata, Scott ; Acontio- 

 phori'S elongatus, Scott ; Ectinosoma Uerdmani, Scott ; Ectinosoma Nor- 

 mani, Scott ; Ectinosoma elongata, Scott ; Cancerilla tuhulata, Dalzell ; 

 Lepeoptheirus jicctoralis, and Anchorella appendix. Also one species new to 

 science, viz., Fseudocyclopia stephoides, n. sp. This crustacean has not yet 

 been described, but its description and figure will be shortly published in 

 the " Transactions of the Liverpool Biological Society." It combines some 

 of the characters of the genus Stephos with those of Fseudocyclopia, the 

 latter predominating sufficiently to determine its position in that genus. 



'Surface tow-nets have been continuously employed during the several 

 marine expeditions undertaken by the Committee, also tow-nets attached 

 to the rope a few fathoms above the dredge. The latter device has 

 proved a success, collecting some good species of Copepoda as well as 

 Cumacea and Amphipoda, which are seldom or never obtained on the 

 surface. Amongst the Copepoda thus obtained were several specimens of 

 Pseudocalanus armatus, found along with a shoal of Pseiidocalanus elon- 

 gatus. A widely extending shoal of Anomalocera Patersonii was observed 

 off the Isle of Man in May, the only occasion on which we have taken this 

 species during the year. On several occasions, notably in the early part 

 of June, the surface organisms have been singularly scarce. 



' Special care has been taken to wash and sieve through fine silk as 

 much as possible of the material brought up by the dredge during marine 

 expeditions, and it is by this means that several of the above-mentioned 

 Copepoda new to the district have been obtained, as well as the new 

 species Pseudocyclopia stephoides. Large quantities of ophiuroids, chiefly 

 Ophiocoma nigra and 0})hiothrixfragilis, are amongst the dredged material, 

 and it is probably from one or other of these that the two specimens of 

 Cancerilla tuhulata, Dalyell, a male and female, were taken, as the species 

 is parasitic on ophiuroids. The first record of this rare copepod occurs in 

 Dalyell's " Powers of the Creator," 1851, and it has since been taken by 

 Mr. Gamble at Plymouth, and by Mr. Scott in the Forth, but not before 

 in our district. Cyclojis magnoctavus, Cragin, was found along with 

 quantities of Temorella affinis and Tachidius hrevicornis in tow-nettings 

 taken by Mr. Ascroft in low- water marine pools at Lytham. These being 

 brackish species, it is evident that a considerable amount of fresh water 

 finds its way into the Lytham pools. 



' Cyclops Eivarti, Brady, although first taken in the Forth estuary, was 

 suspected by Brady to have a fresh-water origin. Ours are evidently 

 strictly marine, two specimens, both males, having been dredged at 20 

 fathoms by Mr. Thompson off Port Erin. 



' Professor Herdman's fish laboratory has yielded two species of parasitic 



