TuBULARiA. Z. HYDROIDA. 115 



Tub. gracilis any essential specific character : the differences he points 

 out between it and T. indivisa seem to depend on the pecuHar locali- 

 ty of the former, viz. on chains or wood exposed to a rapid current. 



2. T. Larynx, tubes clustered, slender, cylindrical, ringed at 

 regular intervals : polypes tvith a double series of tentacula. 

 Plate III. Fig-. 3, and Plate IV. Fig. 3-5. 



Var. a. The tubes simple or undivided. Plate III. Fig. 3. Fucus Dealensis 

 fistulosus, laryngae similis, Raii, Syn. i. 39, no. 8. Petiv. Oper. iii. 39, 

 no. 406. Ellis in Phil. Trans, abridg. x. 453, pi. 10, fig. c, and xi. pi. 

 5, fig. 3, young Tubulous Coralline wrinkled like the windpipe, El- 

 lis, Corall. 30, no. 1. tab. 16, fig. h. Corallina tubularia laryngi similis, 

 Bast. Opusc. Subs. 41, tab- 2, fig. 3-4 ; and tab. 3, fig. 2-4 Tubu- 

 laria muscoides. Pall. Elench. 82. Berk. Syn. i. 214. Turt. Gmel. iv. 667. 

 Turt. Brit. Faun. 210. Stetv. Elem. ii. 438. Bosc, Vers, iii. 90. Flem. Brit. 



Anim. 552. Tub. Larynx, Soland. Zooph. 31. Lavi. Anim. s. Vert. 



ii- 110. Hogg's Stock. 34. — La Tub. muscoide, Blainv. Actinolog. 470. 



Var. b. The tubes sparingly and irregidarhj branched. Plate IV. Fig. 3, 



4, 5, and Plate V. fig. 3, 4. Tubularia muscoides ? Lin. Syst. 1302. 



Corall. 101. Fistularia muscoides ? Mull. Zool. Dan. prod. 254, no. 



3068 Fistulana muscoides ? Fabric. Faun. Groenl. 442. 



Hab. On shells, corallines, Sec. beyond low-water mark, (a.) 

 " Found about Deal by the Reverend Mr Hugh Jones* and Mr 

 James Cuninghame f " Petiver. " Found in great plenty in the 

 sea, near the opening- of the Thames, adhering to other marine bodies, 

 and often to the bottoms of ships," Ellis. Stockton-on-Tees, J. Hogg, 

 Esq. Scarborough, Mr Bean. — (b.) Berwick Bay, parasitical on Tu- 

 bularia indivisa and ramea. 



Polype-tubes, in var. a, clustered, about 2 inches in height, un- 

 divided and fiHform, more or less entwined at the base, of a thin pel- 

 lucid pale corneous texture, wrinkled and annulatedat intervals, whence 



* " A very curious person in all parts of Natural History, particularly in Fos- 

 sils, some of whicli he hath sent me from Maryland, \\Tth several volumes of 

 Plants very finely preserved ; with divers Insects and Shells. From this oblig- 

 ing gentleman, I am promised frequent remittances of whatever those parts af- 

 ford, as well Animals and Fossils as Vegetables." — Petiver. 



f Cuninghame was a Surgeon, probably in the East India Company's service, 

 and had visited those places which lie in the course of its trade, whence he 

 brought numerous plants, &c. to enrich the museum of Petiver. The latter styles 

 him " that industrious promoter of Natural Philosophy, and my very ingenious 

 friend ;" — " my very worthy friend ;" — " my hearty friend ;" and the 20th plate 

 of Petiver's English Plants is gratefidly dedicated to the memorij of this " his 

 curious friend," to whom he says he was " beyond expression obliged." 

 Cuninghame is the author of a paper on the plants of the island of Ascension 

 in Phil. Trans, no. 255 ; and seems to have deserved the praises which his con- 

 temporaries bestowed. 



