THE EURYPTERIDA OF NEW YORK 423 
Fig. 111-15 Eusarcus vaningeni noy. Fig.111 Femaleoperculum with portion of opercular 
appendage. Fig. 112 Seventh segment of swimming leg. Fig. 113  Postabdominal segment. 
Fig. 114 Ventral view of the appendages of carapace, I-IVe, the four pairs of endognathites or 
walking legs, showing the same relative lengths as in Eusarcus scorpionis, the second 
being the longest. c, coxa of swimming leg, with gnathobase; d, broad faageiuni doublure of carapace, 
not observed in other specimens of Eusarcus; m, portion of metastoma. Fig. 115 Sternite. All 
figures natural size z 
