ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
61 
media, such as peptone-lecithin, a substance soluble in water and in 
weak alcohols — an extract of yeast which differs from vitamines in its 
resistance to even repeated sterilization. J. A. T. 
(Esophageal Fibres of Some Nematodes. — Carl Allgen- (Zool. 
Anzeig., 1921, 53 , 76-84). In the oesophageal wall of Nematodes there 
are two systems of fibres which have received various interpretations. 
The angle-fibres (Kantenfasern) have been regarded by some as muscular, 
by others as connective or elastic. Allgen finds in his study of 
Odontogeton g. n. (from the wart-hog) definite proof that they are 
muscular. The main or radial fibres are indubitably muscular. In 
other cases the same holds true ; the two sets of fibres are both muscular 
and aid in the passage of food through the gullet. J. A. T. 
Platyhelminthes. 
New Gestode from Pouched Rat. — F. J. Meggitt ( Parasitology ,. 
1921, 13 , 193-204, 1 pL). The duodenum of Cricetomys gambianum 
contains specimens of a Cestode with unarmed scolex and no persistent 
uterus, Inermicapsifer Zanzibar ensis sp. n. The author contrasts it with 
the other species, and discusses the unsatisfactory distinctions between 
Inermicapsifer v. Janicki, Zschokkeella Fuhrmann, and Thysanotsenia 
Beddard. ' J. A. T. 
Protoclepsis tessellata. — Emile Andre ( Revue Suisse Zool., 1921, 
28 , 443-7, 1 ph). Record of a specimen of this leech from the Lake of 
Geneva. It is new to Switzerland and is rare everywhere. It has been 
reported from Chile as well as from various European countries. It 
has probably been brought to Switzerland by some aquatic bird. It is 
very transparent, and eleven pairs of caeca were seen shining through. 
J.A.T. 
Triple Pharynx in Polycelis. — August Thienemann {Zool. Anzeig ., 
1921, 53 , 118-9, 1 fig.). A teratological case of triple pharynx in the 
Planarian Polycelis cornuta from Holstein. There had probably been 
a transverse post-pharyngeal fission, and in regeneration a new pharynx 
had developed on each side of the original pharynx. There was a 
functional lumen in each. The Holstein forms multiply only asexually. 
There is normally a multiplication of the pharynx (polypharyngism) in 
some North American species of Planaria and in some Triclads. 
J.A.T. 
Excretory System of a Cercaria. — Ernest Carroll Faust (. Para- 
sitology , 1921, 13 , 205-12, 6 figs.). An account of the structure and 
development of the excretory system in a cystocercous larva {Cercaria 
pekinensis sp. n.) from the testis of Vivipara lapillorum. The system 
consists of a bladder, a drainage canal through the tail, and a pair of 
anterior collecting tubules, each of which receives eight main (tertiary) 
branches. Each branch is composed of 2 x 4 x 4 units. The branch 
situated most posteriorly has to do with the drainage of the tail. A 
study of representative stages in development shows that the common 
denominator of the excretory system is a + /?, while the pattern of the 
developed cercaria is expressed by 4 (a ) 2 + 4 (/?) 2 . The fundamental 
