34 Moll 
MOLLTJSCA. 
R A witz (359), — Terrestrial Pulmonates can distinguish objects at 1 cm. 
distance ; but only distinguish form at 1-2 mm. : Aquatic Pulmonates 
have no distinct vision : Pulmonate Gastropods possess dermatoptic per- 
ception ; Willem (468). — Eyes of Pulmonata Basommatophora have a 
preoccular lacuna ; Willem (469). — The size of the eyes in Pecten oper- 
cularis increases with the diameter of the animal ; but their number 
varies ; Brindley (46). — Otocysts of the Nuculidce throughout life com- 
municate freely with the exterior ; Pelseneer (324). — Organ of smell 
in Testacella and the Pulmonata generally ; Plate, (353) chap. xi. 
10. Generative Organs. 
Genitalia of some Trencsen land Mollusca ; Brancsik (42). — Genitalia 
of Helix pietruskyana, Parr. ; H. vicina , Ross. ; II. rossmassleri , Pfr., and 
var. budayi ; H. cingulella , Zgl. ; Brancsik (41). — Genitalia of Hadra 
gulosa, Gould ; Hedley (176). — Genitalia of the Aplysice of the Gulf of 
Naples ; Mazzarelli (274). — Genitalia of Pleurobranchcea , Oscanius , and 
Acera ; Mazzarelli (270). — The Septibranchiata and Eulamellibranchiata 
Anatinacea are hermaphrodite, with distinct male and female glands ; 
Pelseneer (323). — Spermatogenesis in Cymbulia peronii and Sepia offici- 
nalis ; Pictet (330). — Generative organs of the Irish slugs figured ; 
Scharfp (380). — Genitalia of some Grecian slugs ; Simroth (398). — 
Genitalia of Zonitidce from Borneo ; Godwin-Austen (147). — Genitalia 
of Malacolimax melitensis and of Agriolimax caruance , n. spp. ; Pollo- 
NERA (478). 
• 11. Embryology. 
Cleavage of the ovum in Cephalopoda, founded on an embryological 
study of Loligo pealei ; Watase (455). — Development of Clione limacina ; 
Knipowitsch (218). — Ova of Helicarion robustus , Gould ; Hedley (173). 
— Notes on the eggs of British non-marine Mollusca ; Gain (140a). — 
Embryology of Crepidula fornicata and Urosalpinx cinerea ; Conklin (72). 
— Development of Paludina vivapara ; Erlanueu (105). — Development 
of Bythinia tentaculata ; Erlanger (106). — The young Parmaphorus 
shows a trace of tortion and occupies the lower portion of the shell, which 
at that age is not enlarged ; the notch, which is scarcely visible in the 
anterior margin of the adult shell, is very marked in the young ; the 
mantle only partly covers the shell ; Boutan (37). — Embryology of Ostrea 
glomerata ; Kent (214a). — Development of Dreissensia polymorpha ; Kon- 
schelt (225), Weltner (458). — Glochidia of Anodon and Unio ; Latter 
(229). — Embryonal development of Anodonta piscinalis ; Goette (148). 
— Development of Entovalva mirabilis , n. g. & sp., of parasitic Pelecypod ; 
Voeltzkow (448). 
