4 
Descriptive Catalogue of the British Testacea. 249 
Bue od TB WD O DUREE aL 
i Linn. Syst. Nat. n. S34. 
ii i 
navalis. T. testa tenuissima, cylindrica, levi. Linn, Syst Nat. — 
p. 1267. n. 807. Linn. Gmel. p. ‘STAT. d | 
Vallisn. Op. Fis.-Med. 2. t. 4. 
Sellii Hist. Nat. Tered. å. t. 1 
Planc. Conch. 17. n. 2 
Adans. Seneg. t. 19. € l 
Martini Conch. 1. t. Eq HH 
Pennant Brit. Zool. 4. n. 160. ae T 
... Da Costa Brit. Conch. p. 21. Serpula baëa 
Pulteney in Hutch. Dorset. p. 53. t. 18. Ag 21. 
Montagu Test. Brit. p. 527. = 
Donovan Brit. Shells, t. 145. 
— Home i in Act. Angl. 1806. t. 19, 13. 
Habitat intra lignum. navium et palorum marinorum; balatattes navium 
ex Indiis in Europam propagata. (Linn.) 
Testa 4—6 poll., vel magis Ae den bern ed TY nunc ig 
nunc minus obtusa. ET. 
wet n far ioalieent door of Lin- 
næus as to exclude from this descriptive catalogue of the British 
Testacea the genus Sabella. The animals included under that | 
genus have for their coverings particles of sand agglutinated 
on the external membrane, and resemble rather the larve 
of certain ‘insects, ‘than the testaceous Vermes. The latter 
form their calcareous integuments entirely from the secretions 
of their own surfaces, and are attached to these by cartilaginous | 
processes, so as to render é' them essential and indispensable 
2K 1, du PAG 
