 | William Greene Binney - 1875 - Страниц: 220
...margin of the base of attachment. The laterals are like the centrals, but, as usual in the genus Helix, unsymmetrical by the suppression of the inner, lower,...of the base of attachment and the inner side cusp with its cutting point. The transition teeth are characterized by the gradual lesser proportional development... | |
 | United States National Museum - 1885 - Страниц: 984
...but, as usual, asymmetrical by the suppression of the * The ribs are more crowded iu this species. inner, lower, lateral expansion of the base of attachment and the inner sidecusp,withitscuttingpoint. The transition teeth a re characterized by the gradual lesser proportional... | |
 | Smithsonian Institution. Board of Regents - 1886 - Страниц: 1046
...three types, (1) a wide central obscurely tricuspid; (2) lateral, " like the centrals but asymmetrical by the suppression of the inner lower lateral expansion of the base of attachment," and (3) marginals quadrate, low and wide; the mantle anterior, small and shield-like, and the shell represented... | |
 | Michigan. Geological Survey - 1906 - Страниц: 724
...lower margins; laterals of the same type as the centrals, but rendered asymmetrical by the depression of the inner, lower, lateral expansion of the base of attachment and the inner side-cusp and cutting point; marginals with narrow, lengthened basal plates, either unicuspid and thorn-like... | |
 | Michigan. Geological Survey - 1906 - Страниц: 730
...lower margins; laterals of the same type as the centrals, but rendered asymmetrical by the depression of the inner, lower, lateral expansion of the base of attachment and the inner side-cusp and cutting point; marginals with narrow, lengthened basal plates, either unicuspid and thorn-like... | |
 | Calvin Goodrich - 1924 - Страниц: 508
...the Fio. 90. Genitalia of 0. same type as the centrals, but rendered asymcuprca ( is ry). metrical by the suppression of the inner, lower, lateral expansion of the base of attachment and the inner side-cusp and cutting point; marginals with narrow, lengthened basal plates, either unicuspid and thorn-like... | |
 | United States National Museum - 1885 - Страниц: 594
...•••l.'.» 1> •• rr .-. ¡i • ' • • > .H -Г t •«•!••«• 1. 1 i ' i'rr . * »rr inner, lower, lateral expansion of the base of attachment and the inner sidecusp, with its cattingpoiut. The transition teeth are characterized by the gradual lesser proportional... | |
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... cusps, but well-developed side cutting points, and a stout, short median cusp, bearing a cutting point which does not reach the lower margin of the base of attachment. 