426 TUBULIPORID.E. 



STOJIATOPORA GRANULATA, If Orb. Pal. Fr. ten. cr&t. v. 836, pi. dcuviii. 



figs. 5-8 (Alecto on the plate). 

 STOIIATOPORA INCRASSATA, id. ib. 837, pi. dcxxviii. figs. 0-11 (Alecto on the 



plate). 

 ? ALECTO FARASITA, Heller, Brjoz. Adr. M. 49, pi. iii. fig. 10: Manzoni, 



Bry. d. Castrocaro, 41, pi. yii. fig. 69. 



Zoarium dichotomously branclied ; branches linear, some- 

 times anastomosing. Zooecia uniserial, minutely gra- 

 nular, the oral extremity more or less erect and free ; 

 orifice circular. Ooscia (?) . 



HABITAT. On shells and stones, chiefly from deep water. 



LOCALITIES. Cornwall (Couch) : Lee, near Ilfracombc, 

 on Laminaria-roots (T. H.) : Hastings (Miss Jelly) : 

 Northumberland and Durham, rather rare (Alder) : Wick 

 and Peterhead (C. W. P.) : St. Andrews, not rare (Dr. 

 M'Intosh) : coast of Antrim, abundant (Hyndman) : 

 island of Coll, on Pinna (Landsb.) : Hebrides ; Shetland, 

 Outer Haaf, to 170 fathoms, &c. (A. M. N.) : &c. 



GEOGRAPHICAL DISTRIBUTION. Roscoff (Joliet) : Bergen 

 (A. M. N.). 



RANGE IN TIME. Ores vert inferieur, France (Milne- 

 Edwards) . 



In this species the cells are always disposed in a single 

 scries ; they are of about equal width throughout, or 

 sometimes very slightly enlarged above, and altogether 

 adnate, with the exception of the oral extremity, which 

 is in a greater or less degree bent upwards, and stands 

 erect and free. There is, however, much variability in 

 the latter character; and in old specimens, or such as have 

 been developed in exposed situations, the orifice is often 

 very slightly raised. The walls, in young and fresh colo- 

 nies, are decidedly vitreous, and the whole surface is 

 prettily frosted ; with age the walls become thick and 

 opaque, and arc sometimes strongly ribbed transversely. 



