ON FOSSIL POLYZOA. 163 
Alecto (= Stomatopora) gracilis, Milne-Ed., Morris. 
» % ramea, Blainv. a 
» 9 ramosa, Michelin be 
Phillips adds Alecto Calypso, D’Orb., and Mr. Newton Alecto reticulata, 
D’Orb. 
SToMATOPORA GRACILIS, Milne-Ed.! 
Alecto gracilis, M.-Ed. (pars). Woodward’s ‘ Geology of Norfolk’ (pars). 
Dixon’s ‘ Foss. Sussex’ (pars). 
Zoarium wholly adnate; branches linear, delicate, rarely, if ever, 
anastomosing. Zoccia in a single series, thick, or bulging at the nodes ;? 
orifice circular, with a thin peristome. Occia, an inflated cell, with 
orifice depressed. 
Localities —Up. Chalk, Wilts (Phillips). Beachy Head (Miss Jelly). 
Sussex (Dixon). 
I limit, as above, the typical S. gracilis of Milne-Kd., for the very 
special reason that I find in the catalogues of collectors and others that 
the species is very loosely identified. In the specimen before me three 
cells occupy a line and a half, but the cells vary in length, and the 
average may be taken as three cells to a line and a quarter, or a line and 
a half. Generally the branching takes place at the distance of three cells 
apart, an inflated cell (owcia) occupying the apex of a branch just below 
the node. Though distinct from, this species is more closely related to 
S. dichotomoides, D’Orb., than to any other of the Oolitic species; the 
latter, however, are more bulky in the size of the cells. 
STOMATOPORA RAMOSA, Mich. 
? Alecto ramea, D’Orb. Phill. ‘Geo. of Oxford (Greensand Species).’ 
Diastopora ramosa, Michelin. Dixon, ‘ Geo. Sus.’ 
Zoarium adnate, irregularly branching, occasionally anastomosing. 
Zoecia ranging from a single series to multi-serial in the same branch, 
dilated towards the nodes; orifice circular, peristome slightly elevated, 
and occasionally rugose on the surface. Ovccia large, sometimes involving 
two cells, also rugose in front. 
Localities —Upper Greensand, Warminster. Upper Chalk, Sussex 
(Dixon). Beachy Head (Miss Jelly). 
This species, like the first, is also confounded, but in the specimens 
before me, marked Diastopora ramosa, Mich. (Dixon, ‘ Sussex’), there is to 
some extent the same type of cell found in many of the Diastoporide. 
Still, as Mr. Hincks only includes in the adnate Diastopora ‘ discoid or 
flabellate’ forms, I have removed the species to the genus Stomatopora on 
account of its closer resemblance to species of that genus. In all proba- 
bility the Alecto reticulata, D’Orb. (Brit.’specimens), should likewise be 
removed to this species as a synonym. 
Genus TusuLipora, Lamarck. 
This genus is at present unknown to me as a Cretaceous fossil. 
Hagenow gives one species only, 7. parasitica, Hagenow. 
* In every case where my material admits of redescription, I make no apology for 
doing so, because I believe that this will be appreciated by workers. 
* I have used the word node to indicate the part just below the branching of the 
cells, or of the stem. At this part in the Zoariwm there is frequently a knot or a 
bulging, and it is also frequently here that the Owcia may be detected in species. 
M 2 
