ANNELIDA. 
581 
trichus it will be found on tlie parapodium of tlie fourth, 
and in Sacconereis on that of the third segment. The func- 
tion ascribed to these organs is that of toucli, the thin plate- 
like bodies acting as sensitive hairs, and the cell-apparatus as 
the peripheral ending of sensitive nerves (Bericht deutsch. 
Naturf. u. Aerzte, Giessen, 1864, p. 161, pi. v. figs. 10-13). 
Kolliker^s Kurzer Bericht^ (see CoiLENTERATA), contains 
some important details concerning the organs of sense among 
the Annelids, and should be consulted. 
Lankester gives a list of the Turbollaria and Annelida met with by him in 
a dredging expedition off Guernsey and the neighbouring islands. Ann. & 
Mag. Nat. Hist. vol. xvii. 1866, p. 389. 
Grafpe (Verb, zool.-bot, Ges. in Wien, xvi, p. 887) remarks upon some 
of the Annelida observed by him in the Fiji Islands. 
Myzostomum eirrifcrum. Mecznihow (/. c.) gives an account of the deve- 
lopment of this species, and, after alluding to the many opinions that have 
been expressed as to its proper position, assigns it to the Chcetopods among the 
Annelida, loolcing on it as the type of a peculiar group, which he would call 
Chmtopoda ectoparasita. 
ANNELIDA BOLYCHiETA. . 
Aphroditea. 
Baird (/. c.) continues his contributions towards a monograph of this 
family. lie retains the genus Sufalion (And. k Ed.) for the species included 
by Kinberg in his genus Slhcnclais, mentioning that Milne-Edwards had rec- 
tified his mistalte as to the absence of a tentacle in Siyalum matliildcc^ and that 
therefore his genus as amended for this the typical species must stand. For 
the species which Kinberg had referred to his restricted genus Siyalion 
Baird institutes a new genus, Thalmessa. 
Thalenessa, gen. nov., Baird, 1. c. p. 34. Cephalic lobe broad anteriorly ; 
no tentacle j antennm 2, very short, placed on the anterior margin of the 
cephalic lobe,* eyes 2, distant j compound setm bidentate ; simple setje ser- 
rate j elytra covering the back, with ramose fimbriie on the margin. T. 
cdwardsi= Sic/alion (Kinb. non And. & Edw.) cdwardsi (Kinb.). 
Pohpio'e aslerino}, sp. n., and Pohjno'e maculosa^ sp. n., Carrington, Proc. 
Lit. & Philos. Soc. Manchester, iv. 1865, pp. 177 and 178, from Southport. 
■ Siyalion mathildcs (M.-Edwards) is described as a new species, Siyalion 
carrinytonii (Brown), by Carrington, Proc. Lit. & Philos. Soc. Manchester, 
iv. 1865, p. 179. 
Quatrefaqes describes (1. c.) the following new species : — 
Aplirodita cmtencs^ vol. i. p. 194, pi. 6. fig. 8, A. modcsta, p. 195, A. talpci, 
p. 196, pi. 6. figs. 2-4, New Zealand; A. echidna, p. 197, A. cchvms, p. 199, 
pi. 6. figs. 5-7, Mediterranean; A. squamosa, p. 201, New' Zealand. 
Hermionc erinaccus, p. 208, Red Sea ; II. kinheryi, p. 209, coasts of S 3 *ria ; 
II, mathei, p. 210, Isle of France. 
Milnesia nuda, p. 211, Sicily. 
Polyno'e lieudeloti, p. 231, Senegal; P, tentaculata, p. 231, Palermo; P. 
cMtcws/s, p. 238, St. Carlo; P. Hr villii, 240, Port Famine ; 
