S04 ~ - SPECIES OF THE SYSTEMA. 
following additions in the manuscript of the younger Linné, 
“Da Costa, Conch. t. 2, f. 3,” “In Oceano Anglico,” support the 
received opinion. Strange to relate, neither of the two (sup- 
posing them to be distinct) correctly answers to the descrip- 
tion; for the ‘Systema’ declares that the surface is spirally 
(“‘ transversim”’) substriated, and the vertex or top (“ antice”) 
umbilicated. Now the JS. Sinensis of Adams possesses the 
former characteristic, and answers in all other particulars, ex- 
cepting the umbilication and locality. The combined postu- 
lates cannot be found in any known member of the genus, un- 
less possibly in some of the minuter kinds, and nothing is said 
that could lead one to imagine the species to be a microscopic 
one. In all probability Spengler (the authority for the locality) 
furnished the example from which our author drew up his ac- 
count; one feels disappointed, consequently, in not finding a 
figure in harmony with the “ transversim substriata” in the 
great publication of his friend and correspondent Chemnitz, 
whose account of the “ Bulla aperta Linnei” (vol. x. p. 119) is 
not devoid of interest. His delineation (pl. 146, f. 1354, 1355), 
which exhibits some well-marked longitudinal corrugations, has 
been constituted a species by Pfeiffer in his ‘ Register’ to the 
plates of that works 
Bulla HvdDatts. 
The small Mediterranean variety (Encycl Méth. Vers, pl. 360, 
f. 1) of the Bulla hydatis of authors is still preserved in the 
Linnean cabinet, and alone of the shells present agrees with 
the definition of the species. Gualtier’s figure approaches to 
the larger British form, which may possibly prove distinct. 
The recorded locality limited greatly the number of shells to 
be compared with the description, and enabled naturalists to 
identify with readiness this too succinctly defined species. 
Bulla anrypulla. 
The delineations of several very distinct Bulle are grouped 
together in the synonymy of this shell; the smaller figures 
