biological. 
Venn. 23 
history of archoplasm ; Calkins (52). Transition from coelotnic sacs 
to spermathecoe in Heliodrilus ; Beddard (11). Ovaries of Myzostoma $ 
Wheeler (245). Rudimentary gonads in Polynoe larva ; Hacker (101). 
Genital apparatus of Cestodes ; Diamare (69), Loveland (149). 
Abnormalities therein; Diamare (69). Gonads of Distomum ; Looss 
(145) : of ecto parasitic Trematodes ; Oka (181) : of Planocera inqiiilina ; 
Wheeler (244) : of a new marine Triclad ; Wheeler (243). Develop- 
ment of genital apparatus in a Turbellarian ; Russo (201). 
Structure of eggs of Nematodes ; Meyer (163). Development of 
spermatozoa in Gordias ; Ve.tdowsky (232). 
14. Reproduction. 
Sexual differences in Micronereis variegata and modifications in the 
female after the laying of the eggs ; Racovita (188). Hermaphroditisni 
of Myzostoma ; Wheeler (245), Beard (10). 
Asexual multiplication in Turbellaria ; Voigt (235), Keller (127), 
Sabussow (202). 
15. Development and Life-History. 
Development and anatomy of the Tornaria from the islands of 
Bahama and Bernini ; Morgan (172). 
Larval stages of Polynoe ; Hacker (101) : of Chcetopterus ; B^raneck 
(20): of Magelona , and of a Spio ; McIntosh (154). Cell-lineage of 
AmpTiitrite and other Annelids, and comparison with that of Nereis ; 
Mead (160). Notes on development of Earthworms ; Bourne (39) : of 
Leeches ; BOrger (49). 
Development of Taenia anatina ; Schmidt (209) : of T. crassicollis ; 
Loveland (149). , 
Life-history of 2 species of Holostomum and 2 of Ilemisiomum ; Braun 
(44) : of Bilharzia hoematobia ; Looss (148). 
Development of Nematodes ; Jammes (119), List (142). Life-history 
of Nematodes ; Deupser (68), Ebert (72). 
16. Variations in Symmetry, Number, Position, &c. 
In position and mode of formation of the proboscis pore in a new 
species of Balanoglossus ; Hill (112). 
Bifid Earthworms ; Andrews (2), Williamson (248), Service 
(212). Bifid Podarke ; Andrews (2). Forking of scolex in Cestodes ; 
Blanchard (28). 
Variations in number of segments in Earthworms ; Smith, W. W. 
(218). Variations in symmetry in a Perichceta ; Rosa (198): a Geodrilus ; 
Michaelsen (164): in Limnobdella\ Blanchard (24). Spiral segmenta- 
tion in Leeches ; Blanchard (26, 28). 
