GASTROPODA, SCAPHOPODA, PELECYPODA. Moll . 79 
Schismope carinate *, Watson, is a synonym of Scissurella atkinsoni , Ten.- 
Woods ; Hedley, Mem. Austral. Mus. iv, p. 329. 
Scissurella rimuloides , Cptr., is a Schismope ; Pilsbry, Nautilus xvii, 
p. 84. 
Scissurella dalli , Patagonia ; Bartsch, Nautilus xvii, p. 90 : S. cetheria , 
Gulf of Oman ; Melvill & Standen, Ann. Nat. Hist, xii, p. 300, 
fig. : S. australis , New South Wales ; Hedley, Mem. Austral. Mus. 
iv, p. 329, fig. : S. euglypta , Antarctic ; Pelseneer (391), p. 17, fig. : 
n. spp. 
\ Sinuitopsis, n. gen. for S. neglecta , n. sp., Silurian, Bohemia, and others ; 
Perner (393), p. 67. 
t Sphcerocyclus, n. sect, of Bellerophon for B. bohemicus , Barr., Silurian, 
Bohemia, and others ; Perner (393), p. 131. 
t Tremagyrus, n. gen., type T. scaber, n. sp., Silurian, Bohemia; Perner 
( 393), p. 128. 
BOCOGLOSSA. 
kcMMivm, and Patellid^e. 
t Calloconus, n. subgen. of Palceoscurria for P. humilis , n. sp., Silurian, 
Bohemia, and others ; Perner (393), p. 48. 
Nacella cenea, bifid tentacle ; Pelseneer (391). 
+ Palceoscurria , n. gen. for P. calyptrata , n. sp., Silurian, Bohemia, and 
others ; Perner (3§3), p. 46. 
Patella hepatica , n. n. for Acmcea, striata , Pilsbry nec Quoy & Gaimard ; 
Pritchard & Gatliff, P. Soc. Victoria xv, p. 194: P. vulgata, 
detailed anatomy ; Davis & Fleure (140). 
t Ptychopeltis, n. gen. for P. incola , n. sp., Silurian, Bohemia; Perner 
( 393), p. 42. 
III. SCAPHOPODA. 
Dentalium regulare , S. Africa ; Smith, P. Malac. Soc. London v, p. 393, 
fig. : D. inflexum, africanum , p. 224, exaspe?-atum, p. 225, South 
Africa ; Sowerby (492), figg. : D. thetidis , p. 327, virgula , p. 328, New 
South Wales ; Hedley, Mem. Austral. Mus. iv, figg. : n. spp. 
Scliizodentalium , variation shews slits not to be generic ; Sowerby (492). 
IV. PELECYPODA. 
Classification of Pelecypoda by their gill -structure ; Pelseneer (391). 
Classification by, and structure of, the gill ; Ride wood (443). 
- Morphology of Pelecypoda ; Ruedemann (452). 
SEPTIBRANCHIA TA. 
Structure of the gill ; Ridewood (443). 
iBowdenia , n. subgen. of Guspidaria , type C. distir a, n. sp., Oligocene; 
Dall, Tr. Wagner Inst, iii, p. 1504. 
Cetoconcha scapha , Dali, figd. ; Dall, P. U. S. Mus. xxvi, p. 951. 
