206 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Polycarpa argoensis, n. sp., Killary Lough, 20 fms. 

 Ascidiella aspersa, O.F.M., abundant, Killary Lough, 

 5—10 fms. 



do., form pustidosa, A. and H., many large, Killybegs, 

 5—10 fms. 

 Gorella parallelogramma, O.F.M., Killary Lough, 5 — 15 

 fms., mud. 



Some compound Ascidians which have not yet been 

 sufficiently examined, including a beautiful slate-blue 

 Didemnid and a red Polyclinid, were collected at low tide 

 on Inishbofin. 



The descriptions of the two new species are as 

 follows : — 

 Molgula holtiana* n. sp. (PI. IX., figs. 4-8). 



External appearance. — The body is of oval form, and is 

 attached by nearly the whole of the right side (PI. IX., 

 fig. 4) . The edges and the posterior end are rounded, while 

 the anterior end is flattened, and bears the siphons at its 

 two extremities. The branchial aperture is at the ventral 

 edge on a short rounded projection, while the atrial is 

 placed on a longer, narrower siphon at the dorsal edge. The 

 surface is even, and is not covered with sand, but has 

 merely some fine particles of mud and a matted coating of 

 the Alga Gladophora lanosa, which gives a dull brown 

 colour to the specimen. The length and the greatest 

 breadth are about the same, 2 cm. 



The Test is moderately thick and tough, but flexible. It 

 is of a whitish blue tint on the inner surface. It bears 

 short slightly-branched hairs on the outer surface, which 

 have attached to them a little mud, sand grains, &c, and 

 a great number of algal filaments, which are matted 

 together so as to cover up the greater part of the outside 

 of the animal (PI. IX, fig. 4.) 



* Dedicated to my host, Mr. Alfred Holt. 



