330 Natural History of British Zoophytes. 



difference lies in the greater shortness of the tentacula of the former, 

 and this is a character liable to considerable variation, and insufficient 

 of itself for specific distinction. The species has been beautifully il- 

 lustrated, in Trembley's " Memoires," by the pencil and graver of the 

 celebrated Lyonet, for it is an interesting fact that all the figures, and 

 most of the plates, which adorn the admirable book just mentioned, 

 were drawn and etched by the author of the " Traite anatomique de 

 la chenille du saule,"* and are indeed among the very earliest speci- 

 mens of his extraordinary attainments in these arts. 



It may be worth while to call attention to the remarkable resem- 

 blance of the Hydra fusca to the Cucullanus cirratus of MuUer, Zool. 

 Dan. tab. 38, fig. 1-7, which is an intestinal worm ! 



4. H. VERRUCOSA, pale cinereous ; body pedunculate, campani- 

 form ; tentacula longer than the body. 



Hydra verrucosa, Templeton, in Mag. Nat. Hist. ix. 418, fig. 57. 



Hab. Still waters. " In the pond at Cranmore (near Belfast,) 

 Sept. 1812," J. Templeton, Esq. 



" Of a pale cinereous hue, with six verrucated tentacula, of mode- 

 rate length, and nearly equal thickness." — — " This species, when at 

 rest, assumes more of a campanulate form than any other species of the 

 genus, except lutea and the following. The warts are not uniformly 

 diffused, as in pallens ; nor do the tentacula diminish luuch in size to- 

 wards the tips.'' — Templeton. 



** Marine species. 



5. H.? LiTTORALis, " white; head large; about 10 extremely 

 short tentacula encircling the base." Robt. Jameson, f 



Hydra hitea ? Jameson, in Wern. Mem. i. 365 — H. lutea, Flem. Brit. 



Anim. 554 — H. corynaria, Templeton, in Mag. Nat. Hist. ix. 419, fig. 58. 



Hab. Sea shore, adhering to Fuci. Frith of Forth, Professor 



Jameson. " Found adhering to Fucus vesiculosus, at White House 



Point, Belfast Lough, Oct. 1810," J. Templeton, Esq. 



The figure represents a branched animal with enlarged clavate 

 heads encircled round the truncate apex, with tentacula rather shorter 

 than the diameter. — To justify the change I have made in the name, 

 it is only necessary to mention that nothing can be more certain than 



* " Ouvrage qui est a la fois le chef-d'oeuvre de I'anatomie et celui de la gra- 

 vure." — Cuvier. 



t The name affixed to the specific characters is that of the person who, so 

 far as I have been able to ascertain the point, added the species to the British 

 Fauna — Mr Jameson is the present Regius Professor of Natural History in the 

 University of Edinburgh. 



