PEEOPHORA LI STEEL 159 



Bod)/ sub-orbicular, vitreous, transparent, white 

 with orange and brown specks from the viscera showing 

 through. Apertures large. Tentacular filaments short, 

 uneven. Branchial sac with four rows of elliptical 

 stigmata. Oral lamina with filaments. 



D 



Diameter not quite one-tenth of an inch. 

 Hab. Adhering to Confervas and sea-weeds. 



o 



ENGLAND. Not uncommon on the South Coast. 

 Brighton, Sussex, on Conferva \_Polysiphonia~\ elongata 

 (Lister, 1834). Ilfracombe, Devon (Gosse ; Hiuclcs). 

 [Grwyllynvase, Swanpool, etc., Falmouth, Cornwall, 

 attached to the fronds of Fucus serratus, etc. (Cocks, 

 1849).] 



WALES. Coast of Anglesey, adhering to sea-weed ; 

 dredged, 1843 (Forbes Sf Me Andrew). 



IRELAND. [En the Irish Sea (Forbes $* Hanlei/, 

 1848).] 



First record. Lister, 1834 [; coll. 1833]. 



Genus 13. DIAZONA Savigny, 1809. 



Dlazona SAVIGNY [in Descr. Egypt., Hist. Nat. I (1809), 

 pt. 2, p. 23, and] Mem. Anim. sans Vert. pt. 2 [1816], 

 p. 174; WOODWARD Man. Moll. [1856], p. 342. 



Syntethys FORBES & GOODSIR in Trans. Royal Soc. Edinb. 

 XX (1851) [pt, 2, p. 307] ; FORBES & HANLE* Brit. Moll. 

 IV [1853], p. 244; WOODWARD Man. Moll. [1856], 

 p. 340 ; GOSSE Man. Marine Zool. II [1856], p. 34. 



[Diazoma LAMARCK Hist. Nat. Anim. sans Vert. ed. 1, III 

 (1816), p. 101.] 



General mass gelatinous, sub-globose, sessile, attached. 

 Individuals much elongated, forming a single, irregular, 

 or very indistinctly-concentric system ; their upper or 

 thoracic portion free, the lower or abdominal enclosed 

 in the general mass. Apertures terminal, and 6-lobed, 

 the branchial the larger; without ocelli. Tentacular 

 filaments linear. Branchial sac without folds, the 

 intersections of the meshes papilla-ted. Ovaries in the 

 intestinal loop. 



