Dr. Johxston's Catalogue of Zoophytes. 271 



Sp. complicata, Montagu in Wern. Menr. ii. 97, tab. 9, fig, 2, 3.* 



Hab. At the roots of the smaller sea-weeds. 



This small species grows in a thickly clustered manner, so that it is often difficult to as- 

 certain the exact height and limits of a single specimen. I have a specimen which appears 

 to be nearly an inch in height ; the branches are slender, about a line in diameter, and of- 

 ten inosculate. 



3. G. ciliata, small, white, simple, sub-cylindrical, tubular, slightly contracted towards the 

 terminal aperture which is encircled with a row of erect radiating spicula. 



G. ciliata, Flem. Brit. Anim. 525. 



Spongia coronata, Soland. Zooph. 190, tab. 58, fig. 8, 9 ; Montagu in Wern. Mem. ii. 88 ; 

 Lam. Hist. Nat. ii. 370. 



Hab. On the roots of the smaller sea-weeds. 



I have once only met with this species on our coast ; the specimen was half an inch in 

 height. " The surface is closely covered with linear pointed spicula, having a terminal di- 

 rection ; in the substance of the sponge, besides those linear, there are other tri-radiated 

 spicula. The internal surface is full of irregularly shaped pores." — Fleming. 



21. MILLEPORA. 



1. M. polymorpha, encrusting, irregular, surface very uneven and studded over with mam- 

 miliary tubercles perforated on the top ; or even and smooth. 



M. polymorpha, Linn.; Soland. Zooph. 130; Turt. Brit. Faun. 205; Stew. Elem. ii. 

 428 ; Hoggs Stockton, 37 ; Flem. Br. Anim. 528. 



Hab. On rocks, very common. 



Crust of a dull purplish colour, adherent throughout, inclined to spread circularly, at first 

 very thin, even, and smooth, but afterwards often studded over with close-set mammillary 

 tubercles perforated on the top. When old, or when placed in favourable situations, it 

 attains a quarter of an inch in thickness, and becomes very uneven and knobbed. 



I have quoted the above synonymes without any mark of doubt because the authors 

 agree that the species intended by them is common on all the British coast, and that de- 

 scribed by us is the only one which is so. At the same time I must remark that the figure 

 of Ellis which they refer to (Corall. t. xxvii. f. c) is very unlike any thing I have seen on 

 this coast, and is surely a different species. Were it not that Dr. Fleming seems to con- 

 sider the Millcpora lichenoides of Ellis and Solander as comparatively rare, and confined 

 to the " English coast," I would have referred our Millepore to that species. The figure 

 (Soland. Zooph. tab. 23, f. 10, 11, 12) is not uncharacteristic, and the description is at 

 least as applicable as that of M. polymorpha. 



22. CORALLINA. 



1. C. officinalis, much branched, bushy, fastigiate ; branches dichotomous or trichotomous, 



* This valuable essay of a very excellent naturalist Lamoroux has ascribed, with culpable careless 



ness, to Mr. Donovan Encydop. Meth., Vers, ii. 327, &c. 



VOL. II. 3 I 



