RISSOA, 145 



It occurs fossil in tlie coralline crag of Gedgrave 

 (Searles Wood), and is found all round the European 

 coasts. 



N'ote. — To this genus belong, apparently, a number of shells, which, from the 

 rudeness of their delineation, and the extreme brevity of their descriptions, have 

 baffled the efforts of naturalists to recognize them. Such are the following : — 

 Turbo subru/us, Adams, Trans. Linn. Soc. vol. v. p. 3, pi. 1, f. 18, 19, from 



which Mont. Test. Brit. vol. ii. p. 334 ; IMaton and Rack. 



Trans. Linn. Soc. vol. viii. p. 185 ; Turt. Conch. Diction. 



p. 230 ; Fleming, Brit. Animals, p. 300 ; Bissoa suhriifa. 



Brown, 111. Conch. G. B. p. 12, pi, 9, f. 13. 



Supposed by Mr. Jeffreys to be possibly a form of parva var. inierrupta ; it 

 seems to us, however, much more like /?. rubra. 



Turbo strigatus, Adams, Microsc. pi. 14, f. 16. — Mont. Test. Brit. vol. ii. p. 331. 

 — Maton and Rack. Trans. Linn. Soc. vol. viii. p. 186. — 

 Turt. Conch. Diction, p. 229. — Fleming, Brit. Animals, 

 p. 300. — Rissoa strigata. Brown, 111. Conch. G. B. p. 12, 

 pi. 9, f. 8. 

 Wholly derived from Walker's " Testacea Minuta," fig. 38. Supposed by 



Bome to be the fry of R. striatula. 



Turbo retiformis, Mont. Test. Brit. vol. ii. p. 330. — Maton and Rack. Trans. 



Linn. Soc. vol. viii. p. 186. — Turt. Conch. Diction, p. 229. — 



Rissoa retiformis. Brown, 111. Conch. G. B. p. 12, pi. 8, 



f. 3, 23. 



Solely derived from Walker's " Testacea Minuta," fig. 37. Supposed by some 



to be the fry of R. punctura. 



Helix variegata, Adams, Trans. Linn. Soc. vol. iii. p. 67, from which Mont. 

 Test. Brit. vol. ii. p. 446 ; Maton and Rack. Trans. Linn. 

 Soc. vol. viii. p. 204; Turbo variegatus, Fleming, Brit. 

 Anim, p. 301 ; Spira 9 variegata, Brown, 111. Conch. G. B. 

 p. 20. 



Agrees fairly with the lineated variety of labiosa, but has only four whorls ; is 

 usually considered a variety of inco7ispicua, but might also be the fry of almost 

 any of the parva section of this genus. 



Turbo ekgans, Adams, Trans. Linn. Soc. vol. iii. pi. 13, f. 31, 32 ; from which 

 Mont. Test. Brit. p. 333 ; Turbo Adainsii, Maton and Rack. 

 Trans. Linn. Soc. vol. viii. p. 185 ; Turt. Conch. Diction, 

 p. 230 ; R. Adamsii, Brown, Illust. Conch. G, B. p. 11, pi. 9, 

 f. 20, and R. elegans, p. 13. 



The figure reminds one slightly of 7?. costata, and the scanty description is not 

 adverse to the conjecture. 



VOL. III. U 



