_ Valves smooth, thin, transparent; carina rectangularly bent, with the lower part expanded into a flat oblong disc. [Please select]
0
In very young specimens the carina is simply bowed, instead of being rectangularly bent. [Please select]
0
The basal end is rectangularly inflected, and stretches internally nearly across the peduncle; it consists (fig.) [Please select]
0
The ultimate segment projects rectangularly outwards as usual, and has on its inner side, rather beneath the middle, a conspicuous notch (fig.) [Please select]
0
The carina is either straight or curved, but never rectangularly bent, and is always of considerable breadth. [Please select]
0
6, 6 _a_), rectangularly inflected; it is much longer than the fork, in proportion to the upper part of the carina; the disc is not more deeply embedded than the upper part. [Please select]
0
_ Valves 5, approximate; scuta with their umbones in the middle of the occludent margin; carina rectangularly bent, extending up between the terga, with the basal end simply concave. [Please select]
Do you have a better example in your mind? Please submit your sentence!