A18 CYCLOSTOMUS $8. 7. CISTULA 8. 1. 6. 
(sub angulo 609); summo subinflato, flavulo, obtusulo; sutura 
profunda; anfr. 5, celeriter accrescentes, rotundati; nucleolaris 
inflatus; ultimus subventrosus, rotundatus; apertura subverti- 
calis (159 cum axi), angulato-circularis, !/; longitudinis vix 
aequans. Perist. rectum, continuum, bene adnatum, non libe- 
rum. Operculum terminale testaceum, arcte Ó-spiratum; nu- 
cleolo subcentrali, griseo-violaceo. — Long. 14, diam. 11, 
apert. 7 mill — Rat. anfr. 2:5. — Rat. apert. 4:5.* (M.) 
Cyclostomus caspicus Mouss. in Journ. Conch. XXIV. 1876. p. 46. t. 4. £9: 
Habitat Lenkoran ad mare Caspium (Sievers). 
XLV. Cistula. Gray. 
(p. 186.) 
Bod: 
5. Maekinlayi Gundl. — Cyelostomus Makenlayi Schauf. in Cat. Pát. p. 95. 
8/8. 
30a. C. Aguadillensis Pfr. 
T. perforata, oblongo-turrita, truncata, solidula, liris spi- 
ralibus superne vix prominentibus, in anfractibus ultimis di- 
stinetioribus, subapproximatis, lineisque filaribus confertissimis, 
illas transcurrentibus deeussata, vix subnitidula, rubello-fulva; 
spira regulariter attenuata, anguste truncata; sutura mediocris, 
nodulis fasciculato-striatis subcrebre denticulata; anfr. superst. 
5!/,—60, convexiusculi, ultimus basi rotundatus, cirea perfora- 
tionem liris spiralibus fortioribus munitus, antice brevissime 
solutus, dorso carinatus; apertura verticalis, ovalis, superne 
subangulata, intus nitida; perist. duplex: internum continuum, 
vix prominulum, expansiusculum, externum ad anfr. contiguum 
excisum, superne angulato-lingulatum, caeterum peranguste 
patens. — Operc. normale. — Long. 18, diam. 6 mill. Apert. 
intus 4 mill. longa, 3!/, lata. 
Cistula Aguadillensis Pfr. in Malak. Bl. XXII. 1875. p. 207. 
Habitat prope Aguadilla insulae Portorico (Dr. J. Gundlach). 
Obs. Affinis C. rostratae Pfr., sed forma multo graciliore et peristo- 
mate externo minus evoluto, brevissime patente, statim distinguenda. 
