58 DUBLIN NATURAL HISTOET SOCIETY. 



ADDENDUM TO SUPPLEMENTAL DUBLIN LIST OF CEUSTACEA (SEE MEETING, 

 APRIL 17, 1857). BY JOHN R. KINAHAN, M. B. 



The Galathea referred to in the above list as Q. nexa proves to be an un- 

 named species ; it is therefore figured, and a further description of the 

 species is appended ; also a description of the new Iphimcdia figured in 

 the same plate, from a drawing ftimished me by C. Spence Bate, Esq., 

 P. L. S., who has kindly described the species, though too late for in- 

 sertion in its proper place. 



Galathea Andrewsh {mihi). Plate XVI., Fig. 8, a, h, c, d. 



G, rostro brevi, 3-5 dentibus utrinque omatis. Pedibus anticis 

 rotundatis elongatis, angustis sparse tuberculatis, tuberculis spinos 

 saepissime terminantibus. Chelis digitis paraUelis, elongatis angustis ricto 

 minute denticulate, apice adunco ; maxillepedibus extends articulo se- 

 cundo tertium sequante. 



Habitat: '* Sinum Maris Hibemicae, 'Dublin Bay,' dictum." 



This species combines the characters of the genera Munida and Ga- 

 lathea to a great extent : it manifestly belongs, however, to the latter 

 genus. I have named it after William Andrews, M. R. I. A., whose re- 

 searches into our native zoology and botany have so often been laid be- 

 fore this Society. 



The characters of the narrowed, elongated hands, their comparative 

 freedom from spines, the small size of the species, and the character of 

 the beak, separate it from aU described species. For further particulars 

 concerning it, see Supplemental List : it is extremely common. 



ON A NEW AMPHIPOD. BY SPENCE BATE, F. L. S. 

 PLATE XVI. 



Iphimedia {RathTce, n. a. xx.). I. Eblan^ (mihi). 



Head produced into a rostrum ; antennae unfurnished with secon- 

 dary appendage, subequal ; the last segment of the pereion and each of 

 the three anterior segments of the pleon armed, lateral to the dorsal 

 ridge, with two parallel rows of teeth. 



The three anterior segments of tlie pleon each a/rmed with a well de- 

 veloped tooth in the median dorsal line. 



[/. capite rostrato. Antennis simplicibus subaequalibus. Corporis 

 segmentis 8-11, duabus dentium paraUelium seriebus, lateraliter arma- 

 tis, 9-11, forte dente medio dorsi, omatis.] 



This species differs from /. ohesa, on which Rathke founded the 

 genus, in several very important points. The rostrum is more incurved ; 

 the infero-posterior edge of each segment is more pointedly produced ; 

 but that which most strongly strikes the notice is the elevation of a 

 well-developed tooth on the centre of the dorsal surface of each of the 



