274 SERPTJLID^. 



Filograna, Plane. Conch, p. 46 & 1 lii, App. 1. 19. f. A. B. Seba, Thes. 



iii. 10. f. 8 & 19 a. 

 Serpula filograna, Linn. Syst. Nat. p. 1265. Gmel. p. 3741. Berkeley. 



Zool. Journ. iii. 230 (1827); v. 426 (1835). 

 Serpula complexa, Turt. Conch. Diet. p. 153. 

 Filipora filograna, Dalyell, Pow. Creat. ii. 250. pi. 34. f. 1-6. 



Hab. The coralline region, 



Desc. Shell shining, thread-shaped, bunched, with branched, pointed 

 tufts. Animal : with the body strongly compressed, with about 300 

 rather broadish segments, the last ciliated ; on each side two very 

 small, black, remarkable warts, with a pale fleshy and rather obscure 

 longitudinal band ; the anterior area of the back oblong, purplish, 

 with a reddish longitudinal baud ; tufts seven on each side, the an- 

 terior of which are more close : terminal membrane of the branches 

 with eight feathery fleshy cilia, two of which possess a somewhat 

 funnel-shaped operculum obHquely truncated. 



(«) Devonshire. 



49. OTHONIA. 



Fabricia, Blainv. Did. Sci. nat. Ivii. 439. Leuck., Wiegm. Arch. i. 



193 (1849). Gruhe, Fam. Annel. 95, 139. 

 Othonia, Johnston, Loud. Mag. Nut. Hist. viii. 181 (1834). 

 Amphicora, Ehrenb. Mittheil. Naturf. Freunde, 1836, 2. 



There are several remarkable peculiarities in this animal : — the 

 fewness of its segments, — the same number as in caterpillars ; the 

 presence of eyes, or at least eye-like specks, on the first segment, and 

 on the caudal one (for this is not an accidental, but a constant cha- 

 racter) ; the form of the head, with the peculiar formation of the 

 branchiae, — are all characters which separate it from Sabella, and 

 mark it as the type of a distinct genus. 



This accordingly Blainville has established under the name of 

 Fabricia, which is unfoi tunately pre-occupied in Botany, and is com- 

 memorative of the celebrated entomologist. I have consequently 

 thought myself justified in adopting another ; and in selecting the 

 christian name (Otho) of the natural historian of Greenland, I adopt 

 one euphonical enough, and I hope unobjectionable, for it has the 

 same intention as De Blainville' s had, of honouring the memory of 

 one of the best and most accurate of our faunists. 



1 . 0. Fabricii. 



Tubularia stellaris. Mull. Verm. Hist. I pt. 2. 18. 



Tubularia Fabricia, 3Iiill. Prod. no. 3066. Fabr. Faun. Grcenl. 440. 



f. 12 a, b. 

 Fabricia stellai'is, Blainv. Diet. Sci. nat. Ivii. 439. 

 Othonia Fabricii, Johnston, Loud. Mag. Nat. Hist. viii. 181. f. 19. 

 ? Fabricia affinis, Leuek., Wiegm. Arch. i. 193 (1849). 



Hab. The littoral region at low water mark. 



Desc. Body 3 or 4 lines in length, vermiform, cylindrical, nar- 



