10 BRITISH TUNICATA. 



ENGLAND. Falmouth (Alder] . 



CHANNEL ISLANDS. Guernsey (Alder). 



First record. Forbes and Hanley, 1848; [coll. Alder]. 



From its well-defined systems this beautiful species 

 lias at first sight much the appearance of a Botryiliis. 



' 



. 



PIG. 05. Upper extremity of the body of Amaroucium Nordmanni, 

 showing- the branchial aperture. (M. Edwards, pi. iii, f. 3 6.) 



7. Amaroucium pomum M. Sars. 



Amaroucium pomum M. SARS in Nyt Mag 1 , f. Naturvid. 



[VI (1851), p. 155, and in Fork Vid.-Selsk. Christ. 1858 



(1859), p. 66]. 

 Amaroecium pomum ALDER in Ann. Nat. Hist. (3) XI 



[1863], p. 170. 



Colony globose, sub-cartilaginous, yellowish-grey, 

 sessile, attached by a spreading base. Individuals 

 straw-coloured, rather large, set in numerous, regular, 

 circular or oval systems of from six to twelve in single 

 series around a prominent central orifice with a lobed 

 margin ; the lobes corresponding with the number of 

 individuals. Thora.c yellow, pellucid. Branchial sac 

 with ten to eighteen rows of stigmata. Abdomen 

 shorter than the thorax, oval; stomach brownish- 

 yellow, areolated. Post-abdomen long, cylindrical, 

 acuminated below. 



Diameter various. Lenytli of individuals nearly half 

 an inch (12 mm.). 



Halt. Deep water. 



SCOTLAND. Moray Firth (Macdonald). 



First record. Alder, 1863 ; coll. Macdonald. 



