BRITISH ZOOPHYTES. 297 



Hab.: Guernsey {A. M. K), Coll Island {D. L.), 

 Sana Island {Thompson), Isle of Man {T. H.), North- 

 umberland [Alder), Cornwall [R. Q. C). 



This species was discovered by Dr. Landsborough 

 on a valve of Pinna ingens. He likened the young 

 unbranched specimen to " a tear slowly trickling down 

 the cheek, and swelling in its progress." The cells 

 grow in 2 — 4 series, and have tubular free orifices. 

 The colony is much branched dichotomously. The 

 cells are generally free from dots or markings, but are 

 occasionally minutely speckled. 



3. S. DiLATANS, Johnston. 



Alecto dilatans {G. J., W. Thompson, D.L., Alder). 



Hab. : Sana Island [Hyndman), Northumberland 

 [Alder), Islay Island [Lady E. Campbell). 



This is a deep-water species. The ceUs are placed 

 in 1 — 4 series, and are tubular, white, and punctate, 

 with raised orifices. The branches of the zoarium are 

 fullest at the ends, where there are 7 — 8 in a row, and 

 are " constricted at intervals." 



4. S. JoHNSTONi, Heller. 



5. granulata [D'Orh.), Criserpia Johnstoni [Heller). 

 Hab.: Guernsey [T.H.). 



This species forms somewhat flabellate incrustations 

 on shells and stones. The zooecia are uni- or bi-serial. 



6. S. EXPANSA, Hincks. 

 Hab. : Isle of Man [T. H). 



" This species forms clavate incrustations on shells. 

 The zooecia increase in number from one or two to 

 seven or eight in width. They are irregularly dis- 

 tributed, densely covered with minute punctures, and 

 free for a large portion of their length." 



6. S. INCURVATA, Hincks. 



