REPORT ON THE POLYZOA. 
153 
(6) Smittia jacobensis, n. sp. (PL XIX. fig. 7). 
Character. — Zocecia subrhomboidal ; in older parts quite immersed, depressed in 
front, with tlie oral region much elevated and subtubular. Surface punctured. Primary 
orifice subcoarctate or almost orbicular, with an extremely minute spoon-shaped 
denticle behind the middle of the entire lower lip ; two delicate marginal spines above ; 
the peristome soon becomes thickened, at first especially on the sides and in front, with 
a decided median sinus. The thickening and elevation of the sides of the raised 
peristome rapidly increase till the prominences on either side meet in the middle, and 
form a broad bridge in front of the orifice ; below the orifice within the abutments 
of the bridge is developed a sessile median avicularium with a rounded mandible directed 
downwards. Ocecia small, deeply immersed, with a kidney-shaped perforated area on 
the front. 
Habitat. — -Porto Praya, St. Iago, Cape Verde Islands, 100 to 120 fathoms. Off 
Marion Island, 50 to 75 fathoms. (Parasitic on a Salicornaria) . 
The conformation of the orifice and suboral avicularium, though in some respects 
like that in Smittia marionensis and perhaps Smittia landsborovii , differs in the circum- 
stance that in those species the two sides of the elevated peristome never coalesce so as 
to form a bridge ; in Smittia jacobensis also the peristome is not continued round the 
avicularium as it is in those two species, and generally speaking in the whole of the 
so termed genus Smittia, to which, nevertheless, so far as the oral structure is concerned, 
the present species would seem to belong. 
(c) Adnate (lepralian). 
(7) Smittia oratavensis, n. sp. (PI. XXII. fig. 1). 
(1) Smittia marmorea, Hineks, Ann. and Mag. Nat. Hist., ser. 4, vol. xx. p. 214, 1877 ; Brit. 
Mar. Polyz., vol. i. p. 350, pL xxxvi. figs. 3-5. 
Character. — Zocecia immersed at the base, erect above. Orifice clithridiate, or widely 
notched in front ; peristome raised, not thickened, a broad denticle within. Surface 
rugose, finely punctured, with a row of larger marginal pores. An elongated, immersed 
avicularium on the middle of the front ; mandible slender, pointing vertically downwards. 
Ooecia recumbent, deeply immersed, surface punctured. 
Habitat. — Station 75, lat. 38° 38' N., long. 28° 28' W., 450 fathoms, volcanic mud. 
[Port of Orotava, Teneriffe, W.K.P. ; Cornwall and Guernsey, 1 Hineks.] 
This form, of which many years since I received specimens from the Port of Orotava, 
through Mr. W. K. Parker, appears to correspond very closely with Mr. Hineks’ British 
(ZOOL. CHALL. EXP. — PART XXX. — 1884.) Gg 20 
