56 
It is very distinct from any known Bulimus, but has affinities with 
B. terebralis, B. columellaris, and B. clausilioides. 
Bulimus fimbriatus. Bui. testa imperforatd, subuliformi, tenui, 
costis longitudinalibus subarcuatis, lineis confertis parallelis in 
interstitiis costarum sculptd, rufo-fuscd, suturd impressd; an- 
fractus 7-8, tumidi, ultimus ^ longitudinis vix superans, infra 
medium obsolete carinatus; columella subsimplex, ad basim aper¬ 
tures angulum for mans ; apertura subovalis; peristoma simplex. 
Long. 9, diam. 2 mill.; apert. 2 mill, longa, 1 lata. 
(PL IX. fig. 7 a, b.) 
In a box of shells labeled “ Panama.” The nearest ally of this 
very curious shell is the Bulimus gracillimus of Pfeiffer, from Cuba. 
Bulimus achatellinus. Bui. testd perforata, umbilico parvo, 
conicd, obsolete striatd, nitiduld, flavidd, fusco-fasciatd; suturd 
cingulatd, crenulatd, albida ; anfractibus 7—8 convexiusculis, ulti¬ 
mo vix \ longitudinis cequante; apertura semiovalis, peristoma 
rectum, simplex, acutum; columella obsolete contorta, margine 
columellari reflexo, perforationem semitegente. 
Long. 19, diam. 10 mill.; apert. 5 mill, longa, 4 lata. 
(PI. IX. fig. 5 a, b.) 
This shell is from Chatham Island, Gelepagos; it is unlike any 
other known Bulimus, and its characters distinctly indicate affinity 
with the Achatinellince. 
Succinea cingulata. S. testa oblongo-ovatd, vix obliqud, soli- 
duld, striatd, nitiduld, fulvo-succinea, scepe spiraliter albo-lineatd ; 
spira exserta, obtusd; anfractus 4, convexiusculi, ultimus longi¬ 
tudinis cequans; aperturd elongato-ovata, superne acuta, basi ob¬ 
lique pone axin recedente; columella arcuatd. 
Long. 12, lat. 6 mill.; apert. 7 mill, longa, medio 3 lata. 
(PI. IX. fig. 8 a, b.) 
This Succinea is distinct from any recorded by Pfeiffer. It is said 
to come from Mazatlan. The very fine white spiral lines are not 
always clearly marked in colour ; they correspond with lines of deeper 
depression at intervals of the striae of growih. 
Cyclostoma purum. C. testd orbiculari, depressd, albd, niti¬ 
duld, spird elevatiusculd, luteola; anfractibus sex, rotundatis, 
spiraliter sulcaiis, sulcis numerosis, transverse striatis; aper¬ 
turd subcirculari, obliqud, peritremate simplici; umbilico maxitno ; 
operculo -? 
Diam. 48, alt. 17 mill. (PI. IX. fig. 9 a, b.) 
Very near C. Cumingii, a species described by Mr. G. Sowerbv 
from the island of Tumaco. 
5. On the Characters of the Genera Pusionella and 
Clavatula. By J. E. Gray, F.B.S. etc. 
In the List of Genera of Mollusca published in the Proceedings for 
1848, I gave the name of Pusionella to a genus of shell, referring to 
the Nefal of Adanson and the Mur ex pusio of Born as the type. 
