HELIOTYPE CO. BOSTON
PLATE 3.
Photographs of Triarthrus becki, made by C. E. Beecher.
Fig. 1. Specimen 204. See also text [fig. 42] and [pl. 4, fig. 6]. The exopodites and endopodites of the first few segments of this specimen are better preserved than those of any other revealing them from the dorsal side, × 9.5.
Fig. 2. Specimen 220. A large individual exposed from the lower side. It shows well the endopodites and part of the exopodites, and, rather better than any other specimen, the endobases of the coxopodites. × 2.4.