. Annual report. 1st-12th, 1867-1878. Geology. 348 GEOLOGICAL SURVEY OF THE TERRITORIES. found in October and early in November (the 6th) were pure white, and the appendages to the tail seemed to me to be more divaricate than those of summer, in which those appendages were of a red color.' While the males are easily distinguishable from those of 8. texanus by the much greater length and different style of branching of the second antennas, as well as in the smaller frontal tubercle and the slenderer caudal ap- pendages, the females differ but slightly, but may still be distinguished by the smal
. Annual report. 1st-12th, 1867-1878. Geology. 348 GEOLOGICAL SURVEY OF THE TERRITORIES. found in October and early in November (the 6th) were pure white, and the appendages to the tail seemed to me to be more divaricate than those of summer, in which those appendages were of a red color.' While the males are easily distinguishable from those of 8. texanus by the much greater length and different style of branching of the second antennas, as well as in the smaller frontal tubercle and the slenderer caudal ap- pendages, the females differ but slightly, but may still be distinguished by the smaller eyes and longer second antennae. This species is dedi- cated to Dr. L. Watson, who has been indefatigable in securing me specimens for examination of this and other Phyllopods. The male dif- fers from 8. similis Baird from St. Domingo in the second antennae or claspers being much longer and slenderer at tip of the longer branch, while the shorter branch is much narrower. In the female the ovisac reaches to the penultimate segment of the abdomen, while, according to Baird's figure, in 8. similis it scarcely reaches to the end of the fourth segment from the end, and the second antennae are represented as being much larger than in our species. The figures do not exactly correspond with Baird's description, for it is nearly impossible to make a charac- teristic drawing of the members of this family, and particularly of this ; Streptocephalus sealii Eyder. Strepiocepliahts sealii Ryder, Proc. Acad. Nat. Sc. Phil., p. 200, 1879. "In form and size this species resembles 8. torvicornis Waga, but the third joint of the second antennas differs from that species in the details of its structure, and the ovigerous sacs of the female are not blue, as in Waga's animal. The inner branch of the terminal joint of the male claspers is the shortest in- stead of the longest, as in 8. torvicornis; at the in tern o- anterior margin of the short branch there are two un- equal lobes
Size: 1193px × 2094px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectgeology
