BIOLOGICAL. 
Verm. 25 
11 . Sense Organs. 
Sensory nerve endings (spindle-shaped cells over whole surface of body, 
in mouth-cavity and pharynx, and dendritic cells at the base of the setae), 
in Nereis, Nej)hthys, aud Lepidonotus ; Retzius (205). 
Sense-organs of JSTemertines ; Burger (57). Stiff bundles of setae 
supplied with nerves in a Turbellarian ; Chapuis (66). 
Touch-organs in Turbellarians ; PEreyaslawzewa, (193) pp. 66-74. 
Eyes: of Alciopuls , embryology and histology ; BEraneck (14) : of 
Clepsine , showing their development from sensillae ; Whitman (259). 
Eyes of Turbellarians ; PEreyaslawzewa, (193) pp. 78-92. 
Auditory organs : of Alciopids , showing their derivation from dorsal 
cirri; BEraneck (15). Otoliths of Turbellarians; PEreyaslawzewa 
(193) pp. 56-66. 
Nackenorgane : of Syllids ; Malaquin (162). Lateral organs of a 
Cerebratulus unconnected with the ganglion ; Burger (55). Cephalic 
clefts of Turbellarians ; Pereyaslawzewa, (193) pp. 31-34. 
Doubtful sense-organs, in brain of Sipuncuhis ; Shipley (218). 
12 . Genital System. 
Of Hnteropneusta ; Spengel, (231) pp. 648-658. 
Hermaphrodite gland in an Oligochaet on one side, and other variations 
in the arrangement of Gonads ; Woodward (267). Testes of Sutroa ; 
Beijdard (9). 
Oogenesis: in Ophryotrocha ; Korschelt (136), Braem (39): in 
Micronereis ; Racovitza (199). 
Spermatogenesis: in Ophryotrocha ; Korschelt (136), Braem (39). 
Spermatophors : of Lumbricids ; Rosa (209). 
Receptacle seminalis : formed by the modification of a dorsal cirrus in 
Asterope Candida ; Apstein (4). 
Evacuation of eggs in Micronereis ; Racovitza (199). 
Genital system: of Tcenias; Stiles (233): of Cary ophy Ileus; Will (263): 
of Davainea (ovary functioning as uterus), Diamare (80): of another 
species of Dacainea (ovary functioning as shell gland); v. Linstow (149). 
[For canal of Laurer of Trematodes, see under Organs of Uncertain 
Function.] Eggs of Geonemerles and their mode of exit : Dendy (77). 
Reproductive organs of Turbellarians; Pereyaslawzewa, (193) pp. 145— 
164. Spermatogenesis in Turbellarians ; Repiachoff (204). 
Development of germ-cells of Ascaris megalocephala, stages hitherto 
overlooked ; v. Wasielewski (255). Behaviour of chromatin in 
oogeue3is and fertilization ; Zoja (269). Spermatogenesis, Brauer 
Cl); 
Discovery of winter eggs of several species of Callidina ; O. Janson 
(132). 
