412 APPENDIX. No. IV. 
lat. 2, 41, 0, E. long. 9, 16, 0, both having a spmous process on each side of 
their shell, near its opening. One species is beautifully sulcated transversely, 
and the other but slightly so. 
Hyalea tridentata (vulgarly called the chariot Anomia) was also taken in 
abundance in the Gulph of Guinea. 
GASTEROPODA. 
Janthina fragilis was the only species of this class that was brought home ; 
all the rest, as well as the collection of the species of the following class, 
ACEPHALA, 
were lost. 
CiRRIPEDES. 
Nine new species of Barnacles were discovered, all of which are very inte- 
resting; since they augment especially the genus Cineras, of which but two 
species only were known, and ‘also two divisions of Hill’s genus Pentalasmis, 
of which likewise very few have been described. 
Sp. 1. Cineras Chelonophilus. Body lanceolate, peduncle abrupt, upper scales 
small and acuminated behind, the hinder scale straight and linear. 
Ozs. The purplish stripes of this species are very faint, and the scales 
beneath the legs are covered by a thin membrane, which renders them 
very opaque. The space between the superior and posterior scales is 
very great. A large quantity occurred adhering to the legs, neck, and 
shell of some turtles that were taken in 36, 15, 0 N. lat. 16, 32,0 W. 
Jong. See page 9. é 
Sp. 2. Cineras Cranchit. Body obliquely truncated above; the peduncle rather 
abrupt, upper scales linear with obtuse extremities, hinder scale with a 
subgibbose apex. 
Ozs. The vitte are three on each side, very strong; the two anterior 
ones are often interrupted. xi 
Sp. 3. Cineras Olfersii. Body above acuminated, upper scales with both extre- 
mities (especially the hinder one) acuminated, hinder scale at its middle 
subgeniculated, Found on Fucus natans (Linn.) 
