26 Verm. 
XV. VERMES. 
13. Keproduction. 
Sexual and asexual : of Syllids ; Malaquin (162) : of Syllis ramosa ; 
Cori (73) : of Ctenodrilus ; Monticelli (174). Hermaphroditism of 
Ophryotrocha ; Korschelt (136), Buaem (39). Description of male of 
Micronereis variegata ; Raoovitza (199). 
Neotenia in Urogonimus cercatus and Archigetes sieboldi , and the 
distinction of this process from Paedogenesis; Monticelli (172). Repro- 
duction of Geonemertes ; Dendy (77). Asexual reproduction of Turbel- 
larians ; P^reyaslawzewa (193). 
Discovery and description of male of Filaria in the Frog ; Nabias 
& Sabrazes (182) : of Stephanoceros eichornii ; Western (257). 
14. Development, Life History, &c. 
Development of different species of Enteropneusta ; Spengel, (231) 
pp. 363-446. 
Cleavage and formation of germ-layers in Chordates compared with 
that in Annelids ; Wilson (266). Development of Syllids ; Malaquin 
(162) : of Ophryotrocha ; Korschelt (136), Braem (39), Bonnier (34). 
A polytroch larva of a new genus of Polychaet; Korschelt (136). 
Post-larval stage of Arenicola marina ; Benham (13). Relation of rege- 
neration to ontogeny in freshwater Oligochaets ; Wagner (252). 
Development and life-history of Taenias; v. Linstow(149): of Bilharzia\ 
Sonsino (226, 227), Brock (47), Moty (177). Variations in form of 
embryo according to quality of water in which it is placed ; Brock (47). 
Life-history of Distomum hepaticum ; Lutz (158) : of D. sinense ; 
Billet (19). Long cilia to embryo of D. ovocaudatum ; Sonsino (228, 
225). Different forms, one moveable and two immoveable (of which pne 
encapsuled), of Tetracotyle typica ; v. Linstow (148). Development of 
Nemertines, a critical revision ; Burger (56). Introduction to com- 
parative embryology of Turbellarians; Hallez(107). Development of 
Turbellarians of Black Sea; Pj&reyaslawzewa, (193) pp. 164-187. 
Formation of germinal layers in Nematodes ; Jammes (129). Develop, 
ment of Pseudalius injiexus ; List (151) : of Alantonema sylvaticum (and 
life-history); v. Linstow (146) : of male and female of Tylenchus 
radicola ; Cobb (67). 
15. Variations in Symmetry, Number, Colour, &c. 
Variations in the constitution of the somite in Leeches,; Blanchard 
(24 ix). 
Spiral segmentation or intercalation of half segments : in Polychaets ; 
Buchanan (51) : in Leeches ; Blanchard (28, 24 xi, 26) : in Cestodes ; 
Monticelli (170), Barrois (6), Aiilborn (1), Bork (36), Stiles & 
Hassall (234). 
