fo 
PROCEEDINGS 
OF THE 
ZOOLOGICAL SOCIETY OF LONDON. 
January 12, 1841. 
In consequence of there not being a sufficient number of Members 
present to constitute a quorum, the Meeting was adjourned to Ja- 
nuary the 26th. 
January 26, 1841. 
William Yarrell, Esq., Vice-President, in the Chair. 
Letters from E, L. Moore, Esq., and Augustus Elliott Fuller, Esq., 
were read. 
A letter from Sir Edward Cust was next read. This letter con- 
tains a description of a species of Holothuria, presented by Sir E. Cust 
to the Society, obtained at the island of Porto Rico, and remarkable 
for its leopard-like markings. 
A continuation of Mr. G. B. Sowerby’s descriptions of new species 
of shells, collected by H. Cuming, Esq. in the Philippine Islands, 
was next read. 
Hexrx monocuroa. Hel. testd suborbiculari, tenuiusculd, subpal- 
lescente brunned, haud nitente; spird mediocri ; anfractibus quatuor, 
ventricosis, rugulosis, ultimo maximo, ceteris multd majori ; fasciis 
binis medianis saturatioribus, binis pallidioribus ; suturd distincte 
impressd ; aperturd subelliptico-semilunari, intus albd ; labio ex- 
terno latiusculo, rotundato-reflexo, extiis subfusco ; labio interno 
tenuissimo, columellari subdilatato, umbilicum mediocrem partim 
tegente. 
Long. 1°3, lat. 2: poll. 
Hab. ad insulam Tablas dictam. 
This species appears to be very distinct from any of those given 
-by De Férussac, as well as from the Helix Cailliaudi of Deshayes, 
with which I have compared it. Besides the rugulosities which 
cover the external surface, oblique lines of growth are easily distin- 
guishable, which are stronger near the suture. 
Nos. XCVI. & XCVII.—Procrepines or tHE Zoot. Soc. 
