W 33 



TUNICATA. 



BY H. J. BUCHANAN-WOIXASTON. 



ASCIDI^E COMPOSITE. 



Botryllus Schlosserl ^Pallas) Sav Under tones between tide- 

 marks. Generally distributed. 



B. violaceus (H. M.-Edw.) — Under stones between tide-marks. 

 Generally distributed. 



Botrylloldes rubrum (H. M.-Edw.)— Under stones between tide- 

 marks. Generally distributed. 



B. Leach ii (Sav.) — In small masses under stones, at low water mark, 

 S.W. shore. 



Polycllninum aurantium (M.-Edw.)— Very common near Carrick- 

 dorrish, under large overhanging rocks between tide-marks. 

 What appears to be a sandy variety of this species was taken under a 



stone on the S.W. shore, associated with Botryllus. It is a small 



flattened lobular mass, with a thin coating of fine sand covering the 



surface. 



Parascidla Fleming! (Aid.) — Under stones between tide-marks near 

 Carrickdorrish. 



Leptoclinum gelatlnosum (M.-Edw.)— Two or three colonies of 

 what I take to be this species were found under stones between tide- 

 marks on S.W. shore. There were no spicules in the test. The common 

 cloacal cavities were crowded in two of the colonies with loose eggs 

 and spermatozoa, in globular masses. A thin skin seemed to be 

 present over the common orifices, preventing extrusion. 



MARINE MOLLUSCA. 



BY N. COLGAN, M.R.I. A. 



The character of the coast line of Lambay is not such as to 

 raise any strong hopes of its yielding a rich molluscan fauna. 

 For the greater part of its circumference the island is girt 

 with cliffs rising abruptly from water of considerable depth, 

 so that no large area of rock is laid bare at low water. The 

 tidal rocks accessible to the shore collector are almost 

 altogether confined to the west and south-west, where some 

 fairly good ground occurs to the northward of the harbour 

 and in Carnoou Bay and Talbot's Bay. A much smaller area 

 of rock, a few square yards only, emerges at Carrickdorrish on 



c 



