The Eurypterida of New York/Volume 2/Explanations of plates/Plate 63

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PLATE 63

Hughmilleria socialis Sarle
Page 335
See plates 59–62

1 Middle portion of first two sternites to show female genital appendages, the overlap of the metastoma upon the opercular appendage and that of the latter on the next appendage. × 2
2 First two sternites showing male appendage, from the inside of body. × 2
3 Middle portion of operculum and second sternite showing fused parts of female opercular appendage and lanceolate shape of appendage of second sternite seen from inside of body. × 2
4 Half operculum with attached female opercular appendage. Natural size
5 Male genital appendage, a portion of which is scaled away furnishing a cast of the interior. × 3½
6 Male genital appendage. Natural size
7 The free portion of the opercular appendage of a female showing the point of overlap and fusion of the two parts. × 2
8 Second tergite showing the antero-lateral lobes. Natural size
9 First postabdominal ring segment. Natural size
10 Half of male operculum showing the face of the median cleft. Natural size
11 Half of female operculum showing the face of the median cleft. Natural size
12 Section showing the cylindrical form of the postabdomen. Natural size
13, 15 Two views of telsons showing the dorsal carination. Figure 13, × 3½; figure 15, × 2
14 Uncompressed telson. × 2


Hughmilleria socialis Sarle var. robusta Sarle
Page 340

16 Fragment of abdomen showing relatively great width and abrupt postabdominal contraction. Natural size
Horizon and locality. Pittsford shale. Pittsford, Monroe co., N. Y.

The originals are all cotypes of the species and deposited in the State Museum

Memoir 14. N.Y.State Museum. Plate 63.
The Eurypterida of New York plate 63.jpg
G.S.Barkentin del. J.B.Lyon Co. State Printer.