Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 330 DISCOVERY REPORTS optical combination. Such an elaboration of structure must have a marked effect on its functional properties. The cuticle of the limb is continuous over the outer face of the lens (Fig. lo, ait.). An annular depression surrounds the lens near its periphery and is seen clearly in Fig. 10. It is produced by folding of the integument which is very thin and delicate in this region and resembles an arthrodial membrane. A similar folding of the integu- ment was observed by Kemp {igiob, p. 644) in S.
Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 330 DISCOVERY REPORTS optical combination. Such an elaboration of structure must have a marked effect on its functional properties. The cuticle of the limb is continuous over the outer face of the lens (Fig. lo, ait.). An annular depression surrounds the lens near its periphery and is seen clearly in Fig. 10. It is produced by folding of the integument which is very thin and delicate in this region and resembles an arthrodial membrane. A similar folding of the integu- ment was observed by Kemp {igiob, p. 644) in S. debilis, and led him to suggest that the photophores might thereby be permitted some degree of movement, although no related musculature was found. In Hoplophonis a well-developed musculature is present, and will be described later. Fig. 10. Section cut diametrically through one of the boss-shaped photophores borne on the bases of the pleopods of Hoplophorus novae-zealandiae. A similar section is seen in Plate XXV, fig. i. Fixed Duboscq, Delafield's haematoxylin and eosin. cut. cuticle; cytoplasm of photogenic cell; fibrous reflector; o; granular zone at bases of photogenic cells; /./. inner layer of lens; middle layer of lens; '. subsidiary intermediate layer of lens; outer layer of lens; nucleus of photogenic cell; nucleus of reflector tissue ;'. junction zone between the fibres of the photophore nerve and the striated zone; clear area of photogenic cell; attachment of longitudinal photophore muscle; photophore muscle loop (seen clearly in Fig. 12) cut transversely; photophore nerve; striated zone.
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