Diam. 



PLATE I. 



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



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

 tophore (jp) is surrounded by the corona of pyriform nectophores (»). 

 This corona is bisected in the sagittal axis by the aurophore (/) 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 , Striae hepaticse ; sr, proboscis ; so, mouth, . . x 15 



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

 numerous pear-shaped ovaria (_/') 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 



