SERPULA, SILPHA, 200 
crested ; tail-feathers while at the tips; legs 
very long. 3 feet high. 
See MS. P. 
5—i. Serputa. Spec. 48. 
spirorbis, (spiral shell-worm,) shell regular, spi- 
val, orbicular ; the whorls slightly caniculate 
above and inwardly, and growing gradually 
fess towards the center. 
See Ms. P. 
13—2. Sertruiaria. Spec. about 60. 
operculata, (coral grass, coral wheat-heads,) den- 
ticles opposite, pointed and nearly erect, vesi- 
€les obovate, covered with a lid; branches al- 
ternate. : 
See MS. P. 
8—i. SivpHa. Spec. 122. 
rugosa, (carrion beetle,) lip dilated, bifid ; jaw 
one-toothed ; blackish; shells ridged with 
three raised lines; thorax ridged, sinuate be- 
hind. 
See MS. P. 
Remarks. ‘This genus is a remarkable fair 
specimen for affording. the student an opportunity 
to compare the method of dividing an extensive 
genus into sections, and that of cutting it up inte 
new genera, according to Cuvier, Lamark, La- 
sreille, &c. 
They stand thus : 
Sec. B. Lip rounded, entire : jaw one-toothed. 
Or genus Mycreropuacus. 14 species, 
Sec. C. Lip horny, entire; jaw bifid. Or genus 
ScarHipIuM. 38 species. 
22 
