CoaYNA. ZOOPHYTA. NUDA. 553 



204. P. gelatinosa. — Free, branched, tentacula circularly 

 disposed. 



Tubularia gel. Pall. El. 85.— Found along with the preceding. 

 Height about two inches, tufted, shrubby ; stem dichotomously branched ; 

 scarcely enlarging at the extremity ; polypi with a bell-shaped disc, the ten- 

 tacula regularly disposed, and appearing as if webbed at the base ; mouth 

 with a valve. 



NUDA. 



Gen. LXXIV. COR YN A.— Base fixed, head clavate, with 

 distributed tentacula, furnished with suckers. 



205. C. squamata. — Stem simple, carneous, tentacula linear. 

 Hydra squamata, Mull. Zool. Dan, — C squam. (from Pall. Spic. Zool. x. 



36. 41. t. iii. f. 9 — Tubularia affinis, Turt. Brit. Faun. 210 Cor. 



squam. Lamarck, Hist. ii. 62. Flem. Phil. Zool. ii. 616, t. v. f. 1.— 

 On fuci. 



Height about half an inch ; stem round, swelling into an ovate head, va- 

 rying in form ; the mouth is sometimes truncated with a radiated disc ; the 

 tentacula are from 5 to 15 in number, longer than the head over which they 

 are distributed, and nearly of equal dimensions throughout ; the vesicles are 

 globular, and adhering to the body, at the base of the tentacula, by a short 

 footstalk. The whole colour is pink, with a dark medullary band. 



206. C. glandulosa. — Dichotomously branched, coriaceous, 

 tentacula with globular heads. 



Tubularia Coryna, Turt. Brit. Faun, (from Pall. Sj)ic. Zool. x. 40, t. iv. 



f. 8.) — Cor. gland. Lamarck, Hist. ii. 62. Flem. Phil. Zool. 606, t. v. 



f. 2.— On stones near low water-mark. 



Height nearly two inches, branches wrhikled, head lengthened, oval, 



mouth small ; tentacula thick, wrinkled, Avith globular heads, which adhere 



to the fingers when applied ; vesicles globular, sessile, scattered over the 



head ; colour tinged with pink, with a dark medullary band. 



We are inclined to consider the Coryna as one of the Trthdariadm, having 

 a reduced sheath, and agreeing in the tentacular origin of the ovaria. The 

 Plumatella, on the other hand, probably belongs to the SerlulariadcB, though 

 its vesicular mode of reproduction has not been detected. 



Gen. LXXV. HYDRA. — Free, tentacula terminal, and dis- 

 posed in a circle, and furnished with suckers. 



* Inhabiting Ji-esh water. 



207. H. viridis. — Body linear, tentacula from six to twelve, 

 about the length of the body. 



Polype verd, Trembley, Mem. 22, t. i. f. 1. — H. vir. and H. grisea, Linn. 

 Syst. i. 1320. Ellis, Cor. t. xxviii. f. C. — Common on aquatic plants 

 in shallow slow running streams. 



