. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. 32 Bernice P. Bishop Museum—Bulletin 47 cylindrical; it narrows just above its junction with the appendix and is slightly swollen above. The penis retractor is short and seems to be attached to the lung cavity just behind the collar. The appendix has a total length nearly equal to the total length of the penis. It is simple and slightly contracted near the middle. In a few specimens the penis is extruded (fig. ID, h), w^hen it appears as a simple, straight or slightly arched sac, so transparent that v
. Land snails from Hawaii, Christmas island, and Samoa. Snails; Mollusks; Mollusks; Mollusks. 32 Bernice P. Bishop Museum—Bulletin 47 cylindrical; it narrows just above its junction with the appendix and is slightly swollen above. The penis retractor is short and seems to be attached to the lung cavity just behind the collar. The appendix has a total length nearly equal to the total length of the penis. It is simple and slightly contracted near the middle. In a few specimens the penis is extruded (fig. ID, h), w^hen it appears as a simple, straight or slightly arched sac, so transparent that vas deferens, retractor muscle, and appendix are plainly visible through it. In comparison with genitalia of three genera of Vertigininae studied by Watson,1^ those of Pupoidopsis differ considerably. It has a proportionately. Figure lo.—Pupoidopsis hawaiiensis Pilsbry and Cooke: a, ocular and inferior tentacles (No. 79467), cer. g. = cerebral ganglion, i. t. = inferior tentacles, i. t. n. = inferior tentacular nerve, i. t. r. = inferior tentacular retractor, o. t. = ocular tentacle, o. t. n. = ocular tentacular nerve, o. t. r. = ocular tentacular retractor; 6, male and female genitalia with penis partly extruded (No. 7949o), lettering' as in fig. 9, a; Cy jaw (No. 79490) (x 80) ; d, teeth (No. 79490). larger albumen gland; narrower uterus; smaller hermaphrodite gland with terminal follicles in rosette formation, not clustered on one side of the end of the duct as in the genera studied by Watson; larger and lower vesicula seminalis; longer vas deferens, except in Vertigo, which has one of about the same length; and shorter spermatheca duct with lower attachment. The oviduct is not swollen. The penis is proportionately about the same length as that of Vertigo, but diflFers from that genus and from Columella and Truncatellina in tw^o very evident ways: by having an appendix of sub- stantial size (Vertigininae have none) and by having the openings of the male and female genital
Size: 2357px × 1060px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorp, bookcentury1900, bookdecade1920, booksubjectmollusks
