262 New Land Shells from Costa Rica. 
the outer one is so on the extreme marginals. There are 
hardly more than twelve perfect laterals. The change into 
marginals is very gradual. 
Veronicella ——_——. 
Jaw as usualin the genus: 30 to 40 ribs. 
Lingual membrane as usual in the genus. See Terr. Moll. 
U.S., v, 240. 
The species is unknown to me. Its body is long and narrow. 
Bulimulus Irazuensis, Angas.* 
Pi. XI. tg. L, represents an extreme lateral tooth of this ; 
species. The levtenls are extremely numerous, reaching quite 
to the outer edge of the membrane, without changing into | 
marginals. I could not detect the central or first lateral teeth. 
The jaw is of the same type as that figured by me (Ann. 
liye, ING Jel, one ING 1G, USB, ACL, Goll DOWIE, sts, JN) it. £65, Loa 
nwoides, Fér. Tbe median ribs in this species, however, are 
very oblique. In all there are about 82 ribs. 
* Proc. Zool. Soc., Jan. 1878, 73, Pl. V, figs. 17-20. 
EXPLANATION OF PLATE XI. 
Bigs AU Vries GABBIY. esse en Animal in motion. 
BAS Oa rect tern ace ht attest ee Shell. 
Oe Satie pe cae Oe hele Uh eee eet Lingual Dentition. 
Dan a Aiuhsr Ae A aMAr eee. Vics a Caudal mucus-pore. 
1 ON MASEER DTK SRN eH A merch engl mahi Oa Bion Silvio Shell. 
TF deus ah suatie Maltin cayter CUS hat nese ane Lingual Dentition. 
G Small species of Helix......... Lingual Dentition. The extreme 
marginal on a larger scale. 
H Cryptostrakon Gabbi, ....... Animal in motion. 
NEES acticin SIRAe CRE Be Oso mot 56 Jaw. 
A ESPN Siar SERUM Sea arene IO ati oy Rudimentary Shell. 
TRE creche eeoeattcaeiaiane tualy Yale eden shal teen an Lingual Dentition 
L Bulimulus Irazuensis,........ Extreme lateral tooth. 
Me Tebennophorusiyy ence Animal. 
IN saaeichcehi foidte sabe copeoeyny ee Gre reiay aia cp pgs Lingual Dentition. 
OMiimaxmsemuivectus! dase rier Animal. 
UEP IS RS URANO TS Si arte RAISE Bae let Jaw. 
CAE PER URR toe ok SAMA Ae WRT . Lingual Dentition. 
