1869. ] MR. R. B, SHARPE ON THE GENUS ALCYONE, 351 
Prats XXTY, 
Fig. 1. A small portion of the rigid skeleton of Farrea occa, exhibiting its an- 
gulated structure and central canals in the fibres, on which are 
dispersed numerous small attenuato-stellate retentive spicula, x 108 
linear. 
Figs. 2, 3, & 4. Three of the small attenuato-stellate retentive spicula from F, 
ocea, showing some of their numerous variations in form, size, and 
the number of their radii, figs. 2 & 3 x 400, & fig. 4 x 666 linear. 
Fig. 5. A spiculated biternate interstitial spiculum from J’, occa, X45 linear. 
Fig. 6. A tga spiculated biternate interstitial spiculum from Ff. occa, x65 
near. 
Fig. 7, A portion of the harrow-shaped quadrilateral siliceo-fibrous dermal 
structure of Ff. occa oppositely armed at its angles, x50 linear. 
Fig. 8. A fragment of the siliceo-fibrous skeleton of Aleyoncellum speciosum. 
Fig. 9. A slender attenuated rectangulated hexradiate interstitial spiculum with 
nearly equal radii from A, speciosum, 175 linear. 
Fig. 10. A slender attenuated rectangulated hexradiated interstitial spiculum 
with elongated basal shaft from A. speciosum, X< 108 linear. 
Fig. 11. Avery fine specimen of floricomo-hexradiate stellate retentive spicu- 
lum from A, specioswm, x 666 linear. 
Puate XXYV. 
Fig. 1. A portion of a section of the rigid skeleton of Myliusia Grayii, at right. 
angles to the surface, exhibiting the crypt-like arrangement of the 
skeleton, x 108 linear. 
Fig. 2. A section at right angles to the surface of the skeleton of Kaliapsis 
cidaris, from the surface to the basal prehensile organs, exhibiting 
the change of the structure from the basal canaliculated fibres to the 
imperforate and ramifying ones of the superior mass of the skeleton, 
x 183 linear. 
Fig. 3. A portion of the minute ramifications of the fibrous structure of the 
surface of the rigid skeleton of K. cidaris, X308 linear. 
Fig. 4. Three of the foliato-peltate connecting spicula of the expansile dermal 
system of K. cfdaris, one of them (a) haying upon it a group of 
minute incipiently spinous fusiformi-cylindrical spicula, x 175 linear. 
Fig. 5. Two of the minute incipiently spinous fusiformi-cylindrical spicula of 
the dermal membrane of K. cidaris, x 666 linear. 
Fig. 6, A portion of the rigid skeleton of Purisiphonia Clarkei, exhibiting the 
irregular mode of disposition of the canaliculated siliceo-fibrous struc- 
ture, and one of the rectangulated hexradiate interstitial spicula in 
situ, opposite (a), x 108 linear. 
Fig.7. An imperfect rectangulated hexradiate interstitial spiculum from P, 
Clarkei, 175 linear. 
7. On the Genus Alcyone. 
By R. B. Suarre. 
I propose to give short synopses of some of the more obscure 
genera of the family Alcedinide, in order that the various species, 
before appearing in my ‘Monograph,’ may be brought under the 
notice of ornithologists, and thus my arrangements and synonymy 
may be fairly exposed to criticism. It is my wish to make the 
Monograph of the Kingfishers as complete as possible ; and I there- 
fore invite the criticisms of all my friends, in order that I may be 
able to take advantage of them in my larger work. 
