690 Proceedings of the Royal Irish Academy. 



Dexiobranchaea ciliata (Gegenbaur), Sp. ? 



Dexiohranchcea ciliata, ^oas (1886); Pelseneer (1887); Gregenbaur 

 1855). 



Only a few larval stages with ciliated bands were taken in 

 tbe harbour in 1896, on August 4th and 8th, and September 

 2nd. 



All the specimens were of about the same age, and agreed in 

 general appearance with a figiu'e given by Gegenbaur (1855, 

 Taf. iv., fig. 11). 



This species has been recorded from the Faeroe Channel and 

 other parts of the JS'orth Atlantic, and also from the Mediter- 

 ranean. 



Phoeonidea. 



Phoronis hippocrepia, Wright. 



AcUnotrocha. 



The larval stage commonly called Actinotrocha was only taken 

 during the spring. 



1895. It was not uncommon during April and May. A stage, 

 5 mm. in length, about ready to start its sedentary 

 life, was taken on May 13th. 



1897. A single specimen was seen on March 23rd. 



The larval form has been recorded for Scotland and the south 

 coast of England, but I have not met with any records of it for 

 the west coast of Ireland. August and September appear to be 

 the principal months for its occurrence at Plymouth and Fal- 

 mouth. 



Hemichoedata. 

 Balanoglossus. 



Tornaria hrohnii, Bourne, 1889, Journ. Mar. Biol. Assoc, voi. i., 

 n.s., pp. 63-68, pi. vii. 



The larval form commonly called Tornaria was taken only 

 on two occasions. 



1897. July 3rd, four specimens. 



1898. July 22ud, two specimens. 



These specimens agreed in general appearance with the 

 species which is at times not uncommon at Plymouth in August 

 and September. 



