304 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



One large specimen of this species was dredged off the 

 Halfway Rock, near Port Erin, Isle of Man, from a depth of 

 fifteen fathoms, in August, 1885. It forms an irregular 

 mass, nearly 3 cm. in longest diameter, and the sandy 

 investment is about 8 mm. in thickness in some places. 



A smaller specimen from the same locality is probably 

 also referable to this species. Its branchial and atrial 

 siphons are free from sand, and form relatively large clear 

 grey projections. The stigmata in this specimen are relatively 

 larger than in the adult form, but the vessels of the branchial 

 sac have the usual arrangement. 



This species has not been previously found in the 

 neighbourhood, unless it is the form recorded by Forbes 

 [Malacologia Monensis^ p. 57) from the Isle of Man, under 

 the name of Ascidia (Pandocia) conchilega. 



Polycarpa pomaria, Savigny. 



Cynthia pomaria, Savigny, Mem. s. I. Anim. s. Vert., 1816, 



p. 156. 

 Cynthia tuberosa, MacGillivray, Hist. Moll. Aberdeen, p. 311, 



1843. 

 Polycarpa varians. Heller, Untersuchung., iii Abth, p. 19. 

 Sty ela pomaria, Traustedt, Oversigt, etc., p. 415. 



One large specimen of this widely distributed species was 

 dredged off Bay Fine, near Port Erin, Isle of Man, from a 

 depth of twelve fathoms. It occurs on various parts of the 

 English coast, but has not been previously recorded from 

 this neighbourhood. 



The Manx specimen has an abnormal dorsal tubercle. 

 This organ is typically, in this species, of cordate or nearly 

 circular outline, with both horns coiled inwards, and the 

 aperture either on the right side* or the anterior end.t In 



* See Kupffer, Jahresber., p. 217. 



f See Herdman, Report on the " Triton " Tunicata, Trans. R. S. Edin., 

 vol. xxxiii, part i, p. 96. 



