SCOLECIDA. 613 
Mermis lacinulatay sp. n., Schneider, I, c. p. 178, Taf. 14. figs. 6-7, locality 
unknown. 
Gordius setiger, sp. n., Schneider, 1. c. p. 181, Taf. 13. fig. 9, Berlin, and 
G. itnpressus, Schn. 1. c. p. 181, Taf. 14. fig. 3. 
TuilBELLARIA. 
Ithabdocoda, Olaparede has suggested that the Rhabdocada should he 
divided into two groups — the one with two, the other with a single genital 
opening. Mecznikow (1. c. p. 174) states that this peculiarity, from the un- 
certainty of its occurrence, cannot furnish any clnssificatory character for the 
chief divisions or even for the genera ; and he brings forward some remark- 
able facts in connexion with the reproductive organs of a common fresh- 
water form, Frostomum limare, to serve as a proof of this. The peculiarities 
referred to, however, are by no means common to the whole genus, but do 
not even extend to closely allied species, such as a new marine species de- 
scribed as P. helgolandimm (p. 176). 
Lankesteb gives a list of the Turbellaria met with off Guernsey and the 
neighbouring islands. Ann. & Mag. Nat. Hist. vol. xvii. 1866, p. 388. 
Agassiz describes certain stages of the larval form first observed by Lov(5n. 
In this larva, which may belong to Nareda (Gir.), it would appear that there 
was a retrograde metamorphosis j and from the carefully conducted obser- 
vations there could be little doubt that it would eventually become a Ne- 
mertean. Ann. *Lyc. N. York, vol. viii. June 1866, pp. 309-318, figs. 3, 17. 
Agassiz, ibid. p. 308, describes the young of Flanaria granulata, figs. 1-3. 
Alaurina prolifera (Busch). Mecznikow shows that this is probably not a 
larval form, for the specimens met with at Heligoland were furnished with 
hermaphrodite sexual organs ; they are referred to anew species, ui.. composita 
(p. 181), and made a distinct family, Alaurince, in the neighbourhood of the 
Microstotyiece. 
Geodesmus bilineatuSy sp. n. Mecznikow (1. c. p. 434) describes this very 
interesting species of land planarian found in the Botanical Gardens at 
Giessen j it differs in size and in coloration from the Fasciola terrestris of O. F. 
Muller ; full anatomical details are given. 
Ripalium univittatumy sp. n., Grube, 1. c. p. 183, fi’om Madras. 
Acmostomwn dioicuniy sp. n., Mecznikow, 1. c. p. 178, from Heligoland. 
Serpentaria berryiy sp. n., Baird, /. c. p. 101, taken in a drift-net off Sin- 
gapore. » 
Rhamphogordius purpureuSy sp. n., Schneider {1. c. p. 326), Hamburg. R. 
lactmSy Bathke, is dioecious ; R. purpureiiSy Schn., is 'hermaphrodite. (See 
p. 606 for Schneider’s opinion as to the systematic position of this genus.) 
