DuERDEN — On 8ome new and rare Irish Polyzoa. 133 



Geographical Distribution. — Near Bergen, in 120 fathoms, on the 

 carapace of Calcocaris macandrei, Bell ; Bohuslan, on the same 

 (G. 0. Sars). 



4. Triticella pedicellata, Alder. PI. V., figs. 3, 5, 



Farrella pedicellata, A.lder. Northumb. and Durh. Cat. of Zoophy. 

 p. 68, pi. vi., figs. 1-3. 



Farrella pedicellata, Alder. Quart. Jour. Micros, So. vol. v. 24, 

 pi. xiv., figs. 1-3. 



Triticella pedicellata, Hincks. Brit. Mar. Polyz. p. 547, pi. Ixxx., 

 figs. 3-5. 



Zocecia ovate ; oblong ; transparent ; scattered along a delicate 

 creeping stem (in young colonies), or rising in tufts from a continuous 

 horny crust ; dorsal side only slightly curved outwards ; front side 

 occupied almost entirely by the membraneous area ; no angular pro- 

 jection at the base of the area ; truncate above ; wrinkled and slightly 

 narrowed towards the base ; connected with the peduncle without any 

 definite joint. Frenaculwn wanting. Peduncle very slender and 

 variable in length, usually two or three times the length of the cell. 

 Polypide with 12 tentacles. Length of cell -gV inch. 



The zooecium in this is smaller, more delicate, and regular than in 

 the others. There is no frenaculum. The peduncle is not sharply 

 separated from the zooecium by a well-defined joint, as in T. Icorenii 

 and T. loecTcii. The wrinkling at the base of the zooecium passes also 

 on to the peduncle. The whole surface of the former shows very fine 

 transverse lines, of which the more basal wrinklings seem but 

 exaggerations. Although the usual length of the stalk is two or 

 three times that of the cell, in many specimens it is not more than 

 half the length. In some colonies the individuals are numerous, and 

 here the formation of a continuous homy crust can be observed, as in 

 the other two species, showing that the example, which Alder 

 described as "scattered along a delicate creeping stolon," was not a 

 fully -formed colony. 



The only locality from which this species has up to the present 

 been recorded is from Northumberland, where it was obtained by 

 Alder growing on Buccinum undatum and Fusus antiquus from deep 

 water. I have found it from the dredgings of the Eoyal Dublin 

 Society Survey of 1890, from two localities on the west coast of 

 Ireland, in each case growing on old shells. On an old Natica shell 

 from Station 114, oif the Skelligs, the zooecia were very numerous, 

 and the horny crust had formed. 



