HARPA. 171 



it may be the young of H. articularis, in very early whorls of 

 which may be observed a similar duplicate striation. I am glad 

 of an opportunity of figuring this unique specimen in Mr. Hanley's 

 collection, which might have been the very original of Chemnitz's 

 figure. 



7. II. Bivoliana, Lesson, f. 12, 13. — H. testa subangulata, 

 paululum turbinata, grisea, inter costas minute fasciatim et undu- 

 latim fusco strigata ; costis decumbentibus, angustis, interruptim 

 longitudinaliter nigro-lineatis, superne triangulatis, ad angulum 

 supremum acuminatis, antice undulatim crenatis; spira brevi, an- 

 fractu ultimo solum encausto.' — This species, //. crenata of Swain- 

 son, is unquestionably distinct from II. rosea, which, besides the 

 difference in colour, is not at all angular or turbinated above, and 

 has the spire much more produced. 



8. H. rosea, Klein, f. 6, 7, 8. — H. testa ovali, subangustata, 

 rosea, inter costas minute fasciatim et undulatim fusco strigata et 

 maculis magnis rubro picta ; costis decumbentibus, angustis, in- 

 terruptim longitudinaliter fusco-lineatis, superne subspinosis, antice 

 undulatim creuulatis ; spira elevata, anfractibus rotundis ; labio in- 

 terno tenuissime encausto. — More oval than II. Hivoliana (Cre- 

 nata, Sw.) and more rounded at the upper part of the whorls and 

 ribs. The pinky tint and rosy patches between the ribs are 

 constant, although the dark bands in var. f. 6 give a rich purplish 

 aspect to the shell. 



9. H. minor, Rumpk., Mart., f. 27, 28, 29.— H. testa angusta, 

 fulva seu pallide grisea, inter costas fusco seu purpureo undulatim 

 minute strigata ; costis plerumque ina;qualibus, superne acute 

 nodosis, transverse creberrime fusco-lineatis ; spira elevata, anfracti- 

 bus coronatis ; — variat costis crebris. — The more volutiform variety 

 with numerous ribs is regarded as distinct by some collectors, but 

 the varieties are so numerous and the gradations so subtle that I 

 cannot by any means adopt the separation. I am even doubtful 

 as to the propriety of separating the next. 



10. H. crassa, Morch, f. 30, 31. — H. testa H. minori simili, 

 sed crassiore ; costis superne angulatis. — The only tangible dif- 

 ference between this and the last is the angle or shoulder formed 

 on the upper part of the ribs. It is rather conventionally than 

 scientifically that I should adopt a distinct name for this variety 

 or possibly " incipient species." 



11. H. gracilis, Brod., f. 32, 33.— H. testa H. minori simili, 

 sed tenuiore, pallida, elongata, transverse minutissime striata, pos- 

 tice angulata ; spira vix coronata. — This probable species departs 



