1116 The American Naturalist. [December, 
Fig. 3—Vertical section of a small portion of the egg shell showing a 
small part of five lamine ; x 600. 
Fig. 4—Several fibres of different sizes after being dried and mounted 
_ in glycerin. The lumens are filled with air; x 600. 
Ftg. 5—Surface view of a small portion of a ican: x 127. 
Fig. 6—4A few isolated fibres. x 975. 
Fig. T-8— Two views of embryos in their natural positions on the 
yolk ; ł natural size. 
Fig. 9—Left side of head of an embryo showing the scutes. x 54; p 
881. 
Fig. 10—Dorsal view of the same; x 51; p. 881. 
Fig. 11—Anal plate and hemi penes of a male; x 6. 
Fig. 12—Same region of a female; a—rudimentary hemi penes; x 6. 
Fig. 13—Lateral (external) view of a hemipenis; x 51. 
