Plate XIII., p. 183, fig. A.—Silk lining of tube of Atypus piceus (Sulz.), taken at Troyes in Champagne, and communicated to me by M. E. Simon; B, drawing of portion of nest of Cyrtauchenius elongatus (Sim.) made after the description of the discoverer, and subject to his (M. E. Simon's) corrections. This is the only illustration in the present work not taken from an actual specimen. These figures are of the natural size.
Plate XIV., p. 193.—Diagrams of the known types of trap-door nest. Fig. A, nest of Atypus piceus (Sulz.); B, nest of cork type; B 1, the layers of silk with earth rims of which a cork door is composed; C, single-door unbranched wafer type; D, single-door branched wafer type; E double-door unbranched wafer type; E 1, lower door of the same, of the natural size; F, Hyères double-door branched wafer type; F 1, lower door of the same, of the natural size; G, and G 1, double-door branched cavity wafer type. At G 1 the perfect type is seen, while at G, the descending cavity, the outlines of which are indicated by dotted lines, has been filled up; G 2, lower door of the same of the natural size. (Figs. A, B, C, D, E, F, G and G 1, diagrammatic representations of nest on a reduced scale, Figs, B 1, E 1, F 1 and G 2, of the natural size).
Plate XV., p. 198, fig. A.—Nest of Cteniza Californica (Camb.) nearly entire, enclosed in the clayey earth of the bank from which the specimen was taken, the door being artificially represented as being partly open; A 1, door of the same as seen when closed; B, Cteniza Californica (Camb.) from a living specimen; B 1, the same seen in spirits, the legs not represented; B 2, the same seen sideways; (figs. A, A 1, B, B 1 and B 2, are of the natural size); B 3, the eyes, greatly magnified; B 4, the three claws terminating the tarsal joint of the hindmost left leg; B 5, line representing the measured length of the spider excluding the falces and spinners, the uppermost division gives the length of the caput terminating at the half-moon-shaped fovea, the middle division that of the thorax, and the lowest that of the abdomen, while the transverse line gives the breadth of the cephalothorax; B 6, eggs laid by the spider in captivity on the under side of the gauze which covered the box (the position is reversed here) of the natural size; B 7, the same magnified; B 8, another group of eggs, magnified; B 9, a portion of the same still more highly magnified; B 10, lines
