Diam. 



PLATE I. 



Rhodalia miranda, n. sp. (p. 302). 



Fig. 1. Apical view of the corm (from above). The large spheroidal pneuma- 

 tophore (p) is surrounded by the corona of pyriform nectophores (n). 

 This corona is bisected in the sagittal axis by the aurophore (I) on the 

 dorsal side, and by the series of buds (i) on the ventral side, v, Velum ; 

 n\ opening of the nectosac. . . . . . x 2 



Fig. 2. A single cormidium, composed of a very contracted cylindrical siphon (s) 

 and two gonodendra. One gonostyle bears a long sexual palpon (r). 

 sh , Strire hepaticse ; sr, proboscis ; so, mouth, . . x 15 



Fig. 3. A single gonodendron, with two main branches, bearing clusters of 

 numerous pear-shaped ovaria (f) and scattered spindle-shaped sper- 

 maria (h). c, Spirally twisted canal of the contracted gonostyle, . x 15 



Fig. 4. Transverse section through a gonostyle, or the stem of a gonodendron. 

 The transverse section through the basal pedicle of a siphon exhibits 

 nearly the same structure. c, Central canal ; d, entoderm ; e, exo- 

 derm ; ;, structureless, cartilaginous, supporting plate ; z 1 , its radial 

 branched apophyses covered outside by the transverse sections of 

 longitudinal muscles (ml). Inside, between it and the entoderm, a 

 thin layer of ring-muscles (mc), . . . . x 70 



Fig. 5. A fragment of the same transverse section. Characters as in fig. 4, . x 200 



