108 Mr. W. D. Lang—?fevision of the 
Tabular Diagnoses of the Species. 
A. Median process of the apertural bar flattened 
into a proximal shield. 
I. Inerusting «3.4 os REN Ee oie le tahs iste ss ts @ ie ots 1. S. gallica. 
Lf, rect wpilamingr see procs ee hice Ree sc ss ae 2. 8. lavardinensis. 
B. Median process of the apertural bar spini- 
form. 
I. Little or no intercecial secondary tissue. 
a. Length about 1 mm.; costa 18-20; erect, 
uunmila wINAr \, pee reine deere ES 3. S. supplosa. 
6. Length about 2 mm; coste about 15; 
erect, unilaiinarh) Wis cine tek ade sobs os 4, S. soccata. 
e. Length about 3 mm.; coste about 12; 
NCTUSMED | ace ce 2 econ ORR eee 5. S. socculus. 
II. A fair amount of intereecial secondary 
tissue ; erect, cylindrical ............+% 6. S. caligata. 
1. S. gallica, sp. n. 
Type-specimen. British Museum, D. 28422; Turonian; 
Lavardin, France. 
2. S. lavardinensis, sp. un. 
Type-specimen. British Museum, D. 28421; Turonian ; 
Lavardin, France. 
3. S. supplosa, sp. n. 
Type-specimen. British Museum, D. 28887; cortestudi- 
narium-zone ; Cuckmere Haven, Sussex. 
4. S. soccata, sp. n. 
Type-specimen. British Museum, D. 28257 ; cortestudi- 
narium-zone ; Cuckmere Haven, Sussex. 
5. S. socculus, sp. nu. 
Type-specimen. British Museum, D. 24538 ; coranguinum- 
zone ; Gillingham, Kent. 
6. S. caligata, sp. n. 
Type-specimen. British Museum, D. 2639 ; Lower Seno- 
nian ; Chatham, Kent. 
V. Icunoprora, gen. nov. 
Genotype. I. vestigium. 
