22 VerM . 
XV. VERMES. 
Laurer’s canal : discussion of its homology and function ; Looss (145), 
Goto (94). 
Tubular organ in different species of Oncholaimus and discussion of 
its probable function ; z. Strassen (225). Three peculiar cells outside 
the rectal sphincter of Ascaris transfugu ; Shipley (214). 
10 . Excretory System. 
Nephridia of Euphrosyne ; McIntosh (154). Longitudinal nephridial 
duct in Owenia ; Gilson (89). Provisional nephridia of Polynoe ; 
Hacker (101). Peculiar nephridia in Millsonia ; Beddard (12). 
Development of nephridia in Earthworms, plectonephric condition not 
to be regarded as primitive ; Bourne (39). Nephridia of Clepsine ; 
Oka (181) : of other Leeches ; Bolsius (31, 32, 35), Graf (95, 96), 
Burger (50), the two latter confirming Bourne’s observations as opposed 
to those of Bolsius. 
Valvular apparatus in excretory vessels of Cestodes ; Kohler (131) : 
of Trematodes; Kampmann (125). Excretory apparatus of Distomum 
lanceolatum ; Knocii (129) : its development in cercaria of D. echi- 
ntitum j Ciiatin (37). Excretory pore of Cestodes ; Pintner (184). 
Anatomy and histology of excretory organs of different species of 
Ascaris ; Jagerskiold (116). 
11 . Nervous System. 
Of Earthworms, old and new observations ; Friedlander (79) : 
variability in arrangement of nerves; Pisarovik (185) : free nerve- 
endings in epidermis ; Smirnow (216), Retzius (192), Langdon (135). 
Giant-fibres in Cestodes; Pintner (184). Nervous system of Disto- 
mum lanceolatum ; Knocii (129), Sciiuberg (210) : of other species of 
Distomum ; Looss (145). 
Nematodes ; Shipley (214). Gordius ; Vejdowsky (232). 
12 . Sense Organs, 
Organs of sight in eyeless animals ( Spirographis ) ; Nagel (177). 
Eye of Leech ; Merrill (161). 
Organs of taste and smell ; in Earthworms; Nagel (176), Langdon 
(135) : in Leeches, and in certain Polycheeta ; Nagel (176). 
Integumental sense organs in Lumbricida : ; Hesse (109) : in Trema- 
todes ; Sciiuberg (210). 
13 . Genital System. 
Of Lumlriculus variegatus ; Hesse (108). Gonads of a Moniligaster like 
those of lower Oligochcets in position ; Bourne (40). Ovogenesis in 
Micronereis ; Racovitza (188). Spermatogenesis in Lumbricus and 
