. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. 42 Bernice P. Bishop Museum—Bulletin 47 In the Manual of Conchology^^ the statement is made Borcherding tentatively suggests the view that P. rufa is "not a pure species, but a bastard form between P. tessellata Newc. on the one side, and P. proxima Pse. on the ; While this seems rather doubtful, and probably could be proved only by breeding experiments, rufa certainly unites characters of the two species. The embryo has protractive stripes as in P. proxima. Some very rare color forms
. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. 42 Bernice P. Bishop Museum—Bulletin 47 In the Manual of Conchology^^ the statement is made Borcherding tentatively suggests the view that P. rufa is "not a pure species, but a bastard form between P. tessellata Newc. on the one side, and P. proxima Pse. on the ; While this seems rather doubtful, and probably could be proved only by breeding experiments, rufa certainly unites characters of the two species. The embryo has protractive stripes as in P. proxima. Some very rare color forms closely resemble proxima in the later stages; but it differs from that species by the dull surface, deeply sculptured spirally; proxima being glossy, with weak spirals and very slight trace of the minute, wavy, spiral lineolation of the full Partulinas. This, of course, deals with the shells only. Anatomically P. rufa and P. proxima were found to be closer to each other than to any other Par- tulina. Two sections of Achatinella, represented by Achatinella viridans, lehuien- sis var. meineckei, and stewartii var. pro duct a c. f. dunkeri, were not dis- tinguishable except in the smaller size, velvet-black mantle, and gray penis and appendix of A. I. meineckei. The section Eburnella, similar in many ways to Partulina redfieldii, was not found to be uniform. For P. mighelsiana and P. mighelsiana var. Figure i6.—Partulina redfieldii (Newcomb), nerve collar, b. n. = buccal nerve, cer. g. = cerebral ganglion, ped. g. = pedal ganglion, sub. com. = subcerebral commis- sure, t. n. = tentacular nerve. Greatly magnified. bella though alike otherwise differed distinctly in the length of the first division of the appendix, that of the species ranging from 6 to 7 mm., of the variety from 3 to 4 mm. P. nattii differed even more widely. The first division of its appendix ranged from I/2 to 1 J4 nim., the second division and penis were shorter, and the kidney was distinctly wider than were
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Keywords: ., bookauthorp, bookcentury1900, bookdecade1920, booksubjectmollusks
