- 
1877. ] SOUTH-AMERICAN HELICID&. 365 
conica, marginibus leviter convexiusculis, apice flavescente con- 
colori; anfr.7, convexiusculi, lente accrescentes, sutura anguste 
pallida sejuncti; apertura vir obliqua, ovalis, longitudinis totius 
teste + paulo superans ; peristoma lenue, margine dextro bre- 
vissime (vix) expanso, columellari breviter dilatato et reflexo. 
Long. 21 mill., diam. 9; aperturee longit. 83, diam. 5. 
Hab. Zaruma, South Ecuador. 
This pretty delicate species is easily recognized by its style of 
coloration. The transverse series of squarish spots, which are some- 
what distant from each other, are very constant. They are not 
equally remote from one another, but sometimes three or four spots 
are quite close together and thus form a short almost continuous 
transverse band ; this is particularly the case with the two basal 
bands on the body-whorl. As the shell is so thin and semitrans- 
parent, all the markings are visible within the aperture. The two 
apical whorls under a strong lens are seen to be minutely granulated, 
as is the case in many other species. 
B. ziegleri of Pfeiffer, var. (3?, Mon. Hel. ii. p- 175; and B. macu- 
latus, Lea (Ce maculatus, Reeve), have similar styles of marking. 
Butrmus (Liosrracus) ruscosasis. (Plate XXXIX. fig. 6.) 
Testa unguste perforata, elongato-conica, tenuis, semipellucida, 
nitida, alba, fasciis transversis plus minusve interruptis fuscis 
(tx anfr. superioribus 2, in ultimo 3) ornata, ubique minute 
spiraliter striata ; anfractus 7-8, sensim accrescentes, convexius- 
cult, ultimus fascia infima haud interrupta ad basim sita ; spira 
elongata, apice parum acuto nigricante; apertura leviter obliqua, 
intus alba fasciis pellucentibus, longit. totius 2 adequans ; 
perist. tenue, vix expansum, margine columellari reflexo. 
Longit. 29 mill., diam. 12; apertura 11 longa, 64 lata. 
Hab. “Tarapoto, Andes of Peru, Mr. Spruce” (Mus. Cuming). 
This species was labelled in Cuming’s collection as B. lividus, Reeve. 
On comparing the two specimens of it with the types of that species, 
I find certain characters which cannot be reconciled with Reeve’s shell. 
The form and proportion of the whorls are different, also the length 
of the spire is greater in the present species, and its black apex and 
banding are good specific distinctions. The transverse bands in B. 
Suscobasis consist of elongate stripes only interrupted by white spaces 
generally shorter than the stripes, whilst in B. lividus the bands take 
more the form of quadrate spots widely separated. 
B. rectilinearis, Pfeiffer, is also allied to the present species ; but 
it is more sharply conical, shows but the faintest traces of spiral 
striation, has not a black apex, is differently banded, and the colu- 
mellar and umbilical characters are not similar. 
EXPLANATION OF PLATE XXXIX. 

Fig. 1. Bulimus ochrocheilus, p. 362, Fig. 6. Bulimus fuscobasis, p. 865, 
2. subpellucidus, p. 364, 7. —— equatorianus, p. 363. 
3. —— flavidulus, p. 364. 8. — roseolabrum, p. 362. 
4, —— albolabiatus, p. 363. 94, 9b. Helix gealei, p. 361. 
5. orthostoma, p. 864. 

