228 MYEIANIDA. 



dendron annulatorum) on the tentacles and cirri. He also found a number of Cercarige 

 and Distomes in the intestine. 



"What the Amblyosyllis rhombeata (1857) of Grube may be is doubtful ('Annul./ (Erst., 

 1857, p. 29). It has fourteen sub-rhomboid segments, and came from St. Croix. 

 De Quatrefages thinks it is near Ioida, but this can hardly be. Grube's A. lineata, 1 which 

 is roseate and has sixteen segments, from Lussin Picolo, is nearer the British species, 

 and may, indeed, be that form. 



Malmgren 3 describes the falcate bristles of his Gattiola finmarchica as simple, yet in 

 other respects the form does not appear to differ from the British. It is possible that the 

 minute secondary process may have been overlooked. 



De St. Joseph in 1886 points out that without any anatomical differences four species 

 of this form have been made. 



It is doubtful if the species described by Marenzeller (1874), viz., P. plectorhyncha, 

 differs in any essential degree from the present form. A further examination of P. lineata 

 is also necessary. 



A similar species (I. cincinnata, Verrill, 1879) occurs on the American shores; indeed, 

 it is probable that the same form is found there. The Stephanosyllis picta 3 and ornata 4 " of 

 Verrill do not appear to differ materially from the British annelid. Two names are thus 

 given to the same species, and two figures (PI. II, fig. 1, and PL IV, fig. 1) seem to refer 

 to the same form. 



Malaquin 5 points out the structure of the proventriculus of this annelid, the muscular 

 columns having the form of a pyramid, which in transverse section presents two fissures. 

 They also show from fifteen to twenty striations. 



Genus LVII. — Mteianida, Audouin and Milne Edwards (1845). 



Head devoid of palpi, three tentacles — a median and two lateral. A pair of tentacular 

 cirri. The foregoing and the cirri thick and clavate, or almost foliaceous. No ventral 

 cirrus. Reproduction by schizogamy. 



The genus was established by Milne Edwards, who termed the phenomena of its 

 reproduction, multiplication by buds. Ehlers placed it near Autolytus and Procerxa. 

 The second example was procured by Claparede at Naples, and the author considered that 

 it was not mature, being only 3'5 mm. 6 in length, whereas the former specimen (Milne 

 Edwards') was 64 mm. He termed it M. maculata. Viguier found the female form 

 (Sacconereis) of M. fasciata. De St. Joseph observed two examples of M. maculata. 

 Giard showed that M. fasciata, M. Edwards, agreed with M. jpinnigera, Montagu. 

 Malaquin again seems inclined to ignore Giard's diagnosis. 



1 ' Archiv f. Naturges./ 1863, p. 48, Taf. v, fig. 1. 



2 < Annul. Polych./ p. 38, Tab. vi, fig. 36 (1867). 



3 ' Americ. Journ. Sc./ iii, vol. vii, p. 132 (1874), pi. v. 



4 'Proc. Americ. Assoc. Sc./ 1873, p. 378. 



5 Op. cit., p. 230. 



6 This is probably a misprint for 35 mm. 



