359 
7. PROTULA (PSYGMOBRANCHUS) PROTENSA PHIL. 
T. tereti, lævi, protensa, elongata, finem versus parum. atte- 
muata; diam. 2\'". 
Animal Bavescens; branchiarum filis utrinque ultra 40, albis, 
rubro annulatis : raembrana laterali lutea , maculis septeni rubris. 
(Philippi). 
Serpula protensa Lam. V. 1818. p. 364. n. 5. ed. 2. p. 2- 
Chenu 111. Conch. pi. 1. f. 9- et t, X. f. 14. 
Serpula /'ascicularis Blv. Diet. t. 48- p. 558. 
Psygmobranchus protensus »Gm.« Phil. 1. c. 1844. p. 196- 
Protula protensa Grube 1. c. p. 90- 
Hab. in mare mediterraneo , Phil.; Golfo di Tarento . Blv. 
Gmelin's Serpula protensa er ikke begrundet paa Rumph's 
tab. 41 f. 2, som Philippi angiver, men paa Martini's fig. 12 
A., hos hvilken sidste Forfatter Gmelin har laant sin Be- 
skrivelse. Afbildningen fremstiller Roret af en Teredo eller 
en ung Kuphus, og ingen Serpula. Lamarck anfører ikke 
Gmelin, endskjondt Findestedet er taget fra denne Forfatter 
eller fra Martini. Ifølge Blainville ere de Rørstykker, der 
findes i Lamarck's Samling, og som rimeligviis ere de samme, 
der ere afbildede hos Chenu, fra Tarent. Grube anseer 
denne Art, maaskee med Rette, for en Form af den følgende. 
8. PROTULA (PSYGMOBRANCHUS) TUBULARIA MTG. 
Shell taper, subulate and fleomose, with the larger end detached 
and ascending. Diam. -fa inch* length 4-5 inch. 
Animal is an Amphitrite, with between 50-60 annulations; the 
head long, white, barred with pink and green : on each side a loose 
scalloped . transparent membrane , capable of contraction and expan- 
sion . and frequently surrounding the under part: tentacula two. 
beautif'ully feathered . each originating from a single stalk , placed 
near to each other , on the fore part of the head ; on one side of 
each of these stalks are long fibres , placed in regular order ; these 
again are furnished on each side with finer fibres. When the ani- 
mal withdrew its tentacula it became somewhat convoluted, as 
the fibres closed . and turned a little spiral up the stalk : their 
colour pale yellow, or yellowish white. the fibres, or pinnæ, annulated 
with pink. so as to form regular, ?>emicircular lines, when the plumes 
where spread. (Montagu). 
