IIELIX-SOLAROPSIS. 181 



surface probably has wider or narrower bands of angular spots like 

 the allied species, but the bad state of preservation of the individuals 

 at my disposition have this part changed to white, and the color 

 cannot be determined precisely. In the ensemble of its characters 

 this species resembles H. braziliana Desh., and others of the same 

 group. It is distinguished by the less flat form, the whorls more 

 rounded, notably the last one. The umbilicus is a little more open 

 and the peristome less flexuous than in braziliana. (Hupe.) 

 Alt. 18, diam. maj. 37, min. 32 mill. 



Mission of Sarayacu, Peru. 



H. anguicula HUPE, Rev. et Mag. Zool., 1853, p. 300, t. 10; and 

 in Castelnau's Exped. dans 1'Amer. du Sud, Moll., p. 7, t. 1, f. 3. 

 PFR., Monog. Hel. Viv., iv, p. 286. 



Hupe's description is translated above, and his figures copied on 

 pi. 54, figs. 24, 25, 26. Fig. 25 is very poor, like many in the Zoology 

 of Castelnau's Expedition. As Pfeiffer says in his review of this 

 book, " man kann in keiner Haltung des Gehauses den Wirbel und 

 den Nabeleingang zugleich sehen, so wenig wie beide Boden eines 

 Fasses auf der bekaimten Hogarthschen Carricatur." 



I refer to this species the specimen figured on pi. 64, figs. 30, 31 32. 

 It is smaller and less carinated than H. serpens, flatter above; whorls 

 5 ; the granulation is quite obscure. 



Alt. 18, diam. maj. 38, of umbilicus 3 mill. 



H. VIPERA Pfeiffer. PL 50, figs. 77, 78. 



Very narrowly umbilieated, depressed, rather solid, irregularly 

 striate above and densely granulate, pale reddish, with two bands 

 formed of angular spots of alternate white and reddish, one at the 

 suture the other above the periphery, the space between them streaked 

 with reddish ; spire convex, obtuse ; whorls 5, slightly convex, the 

 last subcarinated, with a furrow on the periphery opposite the 

 aperture, not descending anteriorly, beneath irregularly tumid and 

 impressed, radiately striate, painted with bands of bead-like spots ; 

 aperture diagonal, subtriangular lunar; peristome white, the margins 

 remote, upper margin expanded, basal thickened, subreflexed, half 

 covering the umbilicus by its dilation. (Pfr.) 



Alt. 18, diam. maj. 37, min. 31 mill. 



Brazil. 



