Report on the Crustacea Schuopoda of Ireland. 225 



Nyctiphanes Coucliii (Bell). 

 Plato XVI., fig. 1 ; and fig. I., p. 226. 



Thysanojioda Couchii, Bell, "British Stalk-eyed Crustacea,'' 18.53, p. 346. 



Bell's figure, the only drawing of the species with which wc are acquainted, is 

 on a very small scale, and not wholly satisfactory. By the kindness of Mr. C. 

 Green, B.A. (T.C.D.), we are able to give a more detailed illustration of the 

 whole animal, the subject in this case being a male from Valentia Harbour. We 

 are indebted to Mr. M. F.Woodward for a dissection and draAving of the branchial 

 apparatus of the same specimen, and of the copulatory processes of the first 

 pleopods of this and the preceding species. We take tlie subjoined diagnosis, 

 with slight verbal alteration, from Norman. 



Carapace without lateral spines, its lobes not jiroduced over the eyes. Rostrum 

 broadly and bluntly triangular, concealing the base of the eye-stalks. A spine 

 over tlie base of the telson and a small siniple ventral preanal spine. In the male 

 the antennulcs, in addition to the usual reflexed membranous leaflet at the end of 

 the first joint, have another reflexed membranous leaflet at the end of the second 

 joint of the peduncle, the distal portion of the leaflet being cut into digitated 

 processes. 



The copulatory apparatus of the inner plate of the first pleopod (fig. I., p. 226, 

 8) in a specimen of 12 mm. is not unlike that of N. australis, G. 0. Sars {cf. Sars, 

 Challenger Report, xiir., PI. xxi., fig. 6). It is much less complicated than in 

 full-grown N. norvegica [cf. fig. I., 9). We have had no opportunit}^ of exami- 

 ning males of the last-named species at sizes corresponding to what appears to 

 be the fully-developed condition of N. Couchii. (See Note added in Press, p. 250.) 



Not in the Survey Collection. 



Valentia Harbour, surface, September 30th, 1898, per Miss C. Delap. 



Previous Irish Record. — Off Valentia (A. M. N.*). 



Distribution. — Banff ; coast of Cornwall (A. M. N.*) : off Penlee Point, and in 

 Cawsand Bay, Plymouth : Firth of Tay (per W. T. Caiman). 



Genus Thysanoessa, F. Brandt. 

 Thysanoessa neglecta (Ki'oyer). 



Survey. — Station 130, Kenm are river, off Sneem, 24 fathoms, mud. March 30th, 

 1891 (in net attached to trawl, day-time). 



Station 144, west of Inishmore, Aran Islands, about 45 fathoms, April 7th, 1891 

 (in large tow-net, near surface, midnight). 



