DISCOPIIORA, TURBELLARIA. 
427 
prolonged, composed of 4 segments, with 3 longitudinal folds beneath 
followed by 3 transverse fleshy lobes or folds ; below these the oesophagus 
is furnished with G longitudinal plications. Ocelli 10; 4th pair on the 
buccal segment, 6th on the 2nd behind the buccal. Anus dorsal, posterior. 
Acetabulum round, separated from the body by a deep constriction. 
Macrohdellay id../, c. p. 137. Body strongly annulated, stout, broad, de- 
pressed throughout, tapering but little. .Cephalic lobe large, roimded, com- 
posed of 5 segments, its lower surface rugose with longitudinal sulcations, at 
its base a transverse fold, forming sockets for the maxillm w'hen retracted ; 
max. 3, stout and prominent, denticulate, with about 60-G0 teeth. Nine 
plications within the oesophagus. Stomach voluminous, divided into com- 
partments, with large irregular pouches on each side. Ten eyes. Male orifice 
between the 26th and 27th segni. behind the mouth ; vulva between the 31st 
and 32nd ; anus dorsal, posterior. 
Macrobdella valdiviana, Philippi (1). A gigantic leech from Valvidia, feet 
long (extended) ; 92 rings, the first 14 forming a narrow cylindrical neck, the 
others broad ; back convex ; belly flat ; lateral margins serrate from trans- 
verse dorsal ridges. Mouth terminal, small, orbicular, destitute of lips, toctli, 
jaws, or folds; no eyes. Genital openings after the 32nd and 37th ring. 
Sucker posterior, turned towards the belly. Lives probably in the earth, 
feeding on earthworms. [A new generic name will probably be necessary, 
VerrilTs type having priority.] 
Vontohdella impillata, Grube (Australia) : JB. schles. Ges. 1871, p. 6G. A 
list of new Jlirudinecs from Lake Baikal {cf. Zool. Rec. viii. p. 466) is con- 
tained in the same author’s lecture on the fauna of that lake (/. c. pp. 63-57). 
Aulastomum lacustris \_Aulostomum lacustre\ Leidy, swarms in a lake in 
Wyoming Territory (? also in Lake Superior). Leidy, in Hayden’s Geol. 
Survey Montana, p. 382. 
IV. TURBELLARIA. 
1. Grube, E. Besclireibungeii von Planarien des Baikal- 
gebietes. Arch. f. Nat. xxxviii. pp. 273-292, pis. 11 & 12. 
2. Eedchenro, a. P. Zoologitjeskija Samjetki. I. Prjsno- 
vodnie Nemertini. (Moskva : 1872.) pp. 12, 2 pis. (Trans. 
Imp. Soc. Natur.) 
3. Vaillant, Eicon. Rcmarqncs sur Ic devcloppcment d’uric 
Planarie dendrocoelc, le Polycelis Imvigatus, Qu. Mem. 
Ac. Montp. vii. (1868), pp. 93-108, pi. 4. 
Grube describes (1) a collection of freshwater Tlanarica from considerable 
depths in Lake Baikal, partly remarkable for coloration and colossal size ; they 
all belong to the group with 1 genital pore, the mouth in or behind the middle 
of the belly ; pharyngeal tube cylindrical where observed. In most of them 
the eyes were only visible in young specimens ; in a few {Soi'ocelis, subg. n.) 
they formed a single, double, or triple arch on each side ; two are provided with 
suckers on the front margin, none with tentacular prolongations. Planaria 
hepattzony P. (Anocelis) tigrinay pardalhiay and lanceolatay Gr. ; P. {Sorocelis) 
tugrifmeiafa, Gr., and guttata, Gerstf., P. angarenm, Gorstf., torva, var. alhi- 
