SIPHONOSTOMA. TROPHONIA. 223 



tentacula : mouth anterior, without a proboscis : feet mostly bira- 

 mous, the branches wide apart, the dorsal with simple or compound 

 bristles, often curved at the tips : no crotchets : all the tentacular 

 filaments on the head, a pair excepted, appear to be branchial. — 

 Burrowers in mud. 



34. SIPHONOSTOMA. 



Syphostoma, Cuv. Reff. Anim. iii. 196. Quatrefages in Ann. des Sc. 



nat. xii. 286 (1849). 

 Siphonostoma, H. Rathke in Nov. Act. Acad. Nat. Cur, xx. 208 (1843). 

 Chloraema, Quatrefages in lib. cit. 281. 

 Siphonostomum, " Otto," Grube, Fam. Annel. 72. 

 Pherusa, Oken. 

 Lophiocephala, Costa, Ann. Sci. nat. xvi. 276. 



Char. Head distinct, bitentaculate, almost hidden in the anterior 

 tufts of long and numerous bristles ; mouth subterminal, between 

 the tentacula : body elongate, fusiform : dorsal branch of the foot 

 with bristles only, the ventral with bristles and festucse ; and the 

 foot furnished with numerous twisted hairs swollen at the apex, and 

 enveloped in a transparent mucus. 



1 . S. uncinata, body cylindraceous ; eyes 4 ; branches of the feet 

 papillary, simple, with the intervening space even and straight. 



Siphostoma uncinata, Aud. df M.-Edw. Litt. de la France, t. 9. f. 1 ; 



in Cuv. Reg. Anim. iii. 197; and illustr. edit. iii. Annel. 27. pi. 6. 



f. 4. Quatrefages in Ann. des Sc.nat. xii. 287 (1849). 

 Chloraema Edwardsii, Dujard. Ann. Sci. nat. xi. 288. t. 7. f. 1-5. 



Quatrefages in loc. cit. 286. 

 Siphonostomum Edwardsii, Grube, Fam. Annel. 72. 



Hab. The shore near low-water. 



(«) Tenby, S. Wales, F. D. Byster, Esq. 



35. TROPHONIA*. 



Pherusa, Blainville in Diet, des Sc. nat. Ivii. 440. Quatrefages in Attn, 

 des Sc. nat. 3 ser. xii. 288 (1849). 



Trophonia, Cuv. Reg. Anim. iii. 211, Griffith's Cuv. xiii. 30. John- 

 ston in Ann. Nat. Hist. iv. 371. 



Siphonostoma (part.), H. Rathke in lib. s. cit. 208 (1843). 



Siphonostomum (part.), Grube, Fam. Annel. 72. 



Char. Head indistinctly defined, with two tentacula and a tuft of 



* The feminine of Trophonius it is presumed, although I nowliere learn that he 

 had ever a wife. His cave might then have had less reputation for its silence. 

 As the worm is an indifferent architect, the name is not very applicable. Pherusa, 

 however, had been preoccupied by a crustacean insect ; and when I proposed 

 Flemingia, I did not, unfortunately, define the genus. 



