References
- 1908 . Proceed. Acad. Nat. Sci. Philadelphia , : 488 – 488 . text-figs. 1 & 2 (January 29
- 1884 . Rep. U.S. Fish. Comm. for 1882 , : 664 – 664 . footnote
- Ann. Sc. Nat. 8e sér , xvii 106 – 106 .
- Ann. Sc. Nat. 8e sér. t , xvii 50 – 50 .
- Zeitschr. f. wiss. Zool. , xii 121 – 121 . Taf. x. figs. 23–27
- Zeitschr. f. w. Zool. , xxxiv 96 – 96 .
- Zeitschr. f. wiss. Zool. , xxxiv 98 – 98 . Taf. iv. fig 10
- Ann. Sc. Nat. 8e sér. t. , 56 – 56 . pl. xviipl. iii. figs. 62–64