ON THE MARINE ZOOLOGY OF THE IRISH SEA. 535 



Amphihchus melaiwps, n. sp., off Little Orme (see below). 



Metopa horealis, G.O.S., Colwyn Bay and Menai Strait, 2^ fathoms. 



Bletopa ptisilla, G.O.S., Colwyn Bay, 2^ fathoms. 



Metopa Bruzelii, Goes, off Little Orme, 5-10 fathoms. 



Leucothoe spinicarpa, Abild., from Ascidia mentula off Clay Head, and 

 from Pecten off Port Erin. 



Synchelidium hrevicarpum. Bate, Port Erin Harbour. 



Paramphithoe monocuspis, G.O.S., off Puffin Island, &c. (probably im- 

 mature form of P. hicuspis). 



Parampliitlwe assimilis, G.O.S. , Puffin Island, &.c. 



Stenopleustes Malmgreni, Boeck, Rhos Bay, 4 fathoms (not previously 

 known out of Norwegian waters). 



Liljehorgia Kinahani, Bate, 3 miles west of Calf, 19 fathoms. 



Melphidippa macra, Norm., 8 miles west of Port Erin, 33 fathoms. 

 (These show the perfect antennae which were wanting in Dr. Norman's 

 Shetland specimens.') 



3Iaera longimana, Thomp., 3 miles off Port Erin, 20 fathoms. 



Cheirocratus assimilis, Lillj., Port Erin Harbour. 



Photis Beinhardi, Kroy,, off Little Orme. 



Megamphopus cornutus, Norm., 8 miles west of Port Erin, 33 fathoms, 

 and off Little Orme 5-10 fathoms. A comparison of specimens of this 

 from Norway, Shetland, Cumbrae, and Isle of Man shows that the horn on 

 the first epimere diminishes and disappears as the species goes south. 



Podocerus Herdmani, n. sp., off Port Erin, 20-35 fathoms, and 

 Laxey Bay (for diagnosis and figure see pp. 628 and 529). 



Podocerus isopus, A.O.W , Rhos Bay, low water, abundant. 



Eridhonius difformis, M. Edw., Laxey Bay, 10 fathoms (colony of 

 tubes attached to Zoster a). 



Siphoncecetes Colletti, Boeck, Port Erin Harbour, off Garwick Head, 

 and off Little Orme, 5-10 fathoms. Seven of these Amphipoda, Har- 

 pinia crenulata, Aiiiphilochus melanops, Metopa Bruzelii, Metopa pusilla, 

 Paramphithoe monocuspis, Podocerus Herdmani, and Siphoncecetes Colletti, 

 have not been previously recorded in British seaa. 



In regard to the new species, AmphilocMis melanops, Mr. Walker 

 states : — 



' This species is interesting from being very closely allied to A. Marionis, 

 Stebb., from Marion Island, from which it differs chiefly in its larger 

 eyes, and in having the palm and hind margin of both gnathopods less 

 convex. From A. oculatus (Hansen), from the west coast of Greenland, 

 which it resembles in the eye, it differs in having no spiniform process to 

 the anterior margin of the hand of the second gnathopod ; and from 

 A. tenuimanus (Boeck) it differs in the eye, which is described by Sars as 

 being small, impei'fectly developed, and light red ; in the telson, which is 

 much shorter, and in the armature of the outer plates of the maxilhpedes, 

 which are terminated by a single spine, exactly as in 4. Marionis, instead 

 of two spines, as drawn by Sars. The mandibles have the molar tubercle 

 intermediate in character between Amphilochus and Oitanopsis (Sars), to 

 whose Gitanopsis inermis this species also has a great resemblance, but 

 differs in the above character and in the length of the telson, which 

 closely resembles that of A. Marionis. The length of a female with ova 

 is 2 mm. 



' The occurrence of species so closely allied as those mentioned above in 

 • British Association Ecport, 1868, p. 280. 



