Dr. Johnston’s Index to the British Annelides. 461 
Obs. Halithea clava, Templeton in Loud. Mag. N. Hist. ix. 234, 
may not be distinct from this species. 
3. P. impar. 
Polynoé impar, Johnston in lib. cit. ii. 436. 
4. P. viridis. 
Polynoé viridis, Johnston in lib. cit. ii. 437. 
5. P. scolopendrina. 
Polynoé scolopendrina, Johnston in lib. cit. v. 307. 
Aphrodita. 
Aphrodita, Linn. Syst. 1084. Aud. and M. Edw. Litt. de la France, 
ii. 63. Leach in Suppl. Encyclop. Brit. i. 452. Johnston in 
Ann. N. Hist. ii. 427.—Halithea, Lam. Anim. s. Vert. v. 306. 
1. A. aculeata. 
Aphrodita aculeata, Johnston in Ann. N. Hist. ii. 429; and v. 305. 
—Templeton in Loud. Mag. N. Hist. ix. 234. 
2. A. hystriv. 
Aphrodita hystrix, Johnston in Ann. N. Hist. v. 305; and iv. 370. 
3. A. borealis. 
Aphrodita borealis, Johnston in lib. cit. iv. 370. pl. 10. fig. 1-13. 
Species of Doubtful Place. 
Campontia. 
C. eruciformis. 
Campontia eruciformis, Johnston in Zool. Journ. iii. 325; and iv. 
421; and in Loud. Mag. N. Hist. viii. 179. fig. 18. M. Edwards 
in Lam. Anim. s. Vert. 2nde edit. vy. 575 ; and in Lift. de la France, 
ii. 290. 
Obs. MacLeay first suggested that this might be theilarva of a 
dipterous fly,—a suggestion which Mr. Green thinks he has con- 
verted into a certainty (Charlesw. Mag. i. 279). But Mr. Green 
has evidently never seen our Campontia, and his conclusion is hence 
of no weight. 
Branchiarius. 
Branchiarius, Montagu in Linn. Trans. xi. 202. 
1. B. quadrangularis. 
Branchiarius quadrangularis, Montagu in Linn. Trans. xi. 202. pl. 14. 
fig. 1. 
Diplotis. 
Diplotis, Montagu in Linn. Trans. xi. 203. 
1. D. hyalina. 
Diplotis hyalina, Montagu in Linn. Trans. xi. 203. pl. 14. fig. 5. 
