!56 AMPHIPOEUS LACTIFLOREUS. 



adopted for this genus by M. de Quatrefages, was applied by its founder to examples of the 

 Anopla. 



In distinguishing the species of Jmpkiporus the chief characters are drawn from the arrange- 

 ment of the eyes, the nature of the cephalic furrows, and the structure of the stylet-region of the 

 proboscis. 



Generic character.— Eyes more or less numerous and large, but never arranged in a square. 

 Body rather short, and often flattened. 



1. Amphiporus lactiploretjs, Johnston. Plate I, figs. 1 and 2. 



Specific character.— Eyes grouped in two series on each side. Body whitish, roseate or 

 grayish. 



Synonyms. 



1776. Lumbricus oxyurus, Pallas. Miscell. Zool., p. 146, tab. 11, f. 7 and 8. 



1828. Planaria lactiflorea, Johnston. Zool. Journal, vol. iii, p. 489. 



1837. Nemertes lactiflorea, Johnston. Mag. Zool. and Bot., vol. i, p. 535, pi. 17, f. 2 and 3. 



184 1. „ „ W. Thompson. Ann. Nat. Hist., vol. vii, p. 482. 



1843. Borlasia? alba, W. Thompson. Eep. Brit. Assoc, 1843, p. 271. 



1844. Polystemma roseum (partim), (Ersted. Entwurf Plattwur., p. 92. 

 » » „ } , Ibid. De Regionibus marin., p. 80. 



1845. Nemertes glaucus (?), Kolliker. Verhandl. d. schweiz. nat. Gesellsch. zu Chur im Juli, 1844, p. 89. 

 „ Borlasia alba, W. Thompson. Ann. Nat. Hist., vol. xv, p. 320, with woodcut. 



„ Planaria rosea, Ibid. Op. cit., p. 321. 



1846. Borlasia? alba, Johnston. Ann. Nat. Hist., vol. xvi, p. 434 (Index). 

 „ Prostoma lactiflorea, Ibid. Op. cit. (Index), p. 435. 



„ Prostoma ? rosea, Ibid. Index, p. 436. 



„ Polia mandilla, De Quatrefages. Ann. des sc. nat., 3 rae ser., Zool., torn, vi, p. 203, tab. 8, f. 1 and 



la, and tab. 9, f. 2. 



mutabilis, Ibid. Op. cit., p. 205, tab. 10, f. 2. 



violacea, Ibid. Op. cit., p. 210. 



berea, Ibid. Op. cit., p. 211. 



glauca, Ibid. Op. cit., p. 206, tab. 10, f. 3. 



mandilla, Ibid. Voyage en Sicilie, vol. ii, p. 115, pi. 15, f. 1, a b. 



mutabilis, Ibid. Op. cit., p. 117, pi. 15, f. 4 and 5. 



violacea, Ibid. Op. cit., p. 122, pi. 16, f. 16, and pi. 17, f. 1. 



berea, Ibid. Op. cit., p. 123, pi. 15, f. 13. 



glauca, Ibid. Op. cit., p. 118, pi. 15, f. 7—9, var. 

 1850. Nemertes glaucus, Von Siebold. Archiv fur Naturges., ii, p. 382. 

 „ „ mandilla, Diesing. Syst. Helm., vol. i, p. 275. 



„ Omatoplea mutabilis, Ibid. Op. cit., p. 252. 

 „ „ violacea, Ibid. Op. cit., p. 253. 



„ „ berea, Ibid. Op. cit., p. 252. 



„ „ glauca, Ibid. Op. cit., p. 253. 



„ „ alba, Ibid. Op. cit., p. 252. 



1853. Gordius albicans, Dalyell. Pow. Creat., vol. ii, p. 73, pi. 10, f. 5a and 6. 



1849. 



