AVICULA. 



Plate XIV. 



Species 50. (Mus. Cuming.) 



.\viccLA FIBROSA, /hie. testa mbovatd, postice subpro- 

 dueta, tenuicuUI, convexd ; castaneo-rufd, epidermide 

 fibrosa dense fiiniriatd, quasi squamidis, indtitd. 



The fibeous Avicula. Shell somewhat ovate, poste- 

 riorly rnther produced, rather thin, convex ; chestnut- 

 vert, covered with a fibrous epidermis, elaborately fes- 

 tooned like scales. 



IJab. Catanaun, Island of Luzon, Philippines ; Cuming. 

 A species of elegant form, moderately winged, covered 



with a fibrous cpidermi.s, developed in scale-like festoons. 



Species 51. (Mus. Cuming.) 



AvicuLA TROCHILUS. Avic. testd elongato-trigond, ob- 

 liqnd, comeximculd, postice acute alatd, lavigatd ; vi- 

 vide aurantio-rttfd, supertii aureo-hitescenle. 



The humming-bird Avicula. Shell elongately trian- 

 gular, oblique, rather convex, posteriorly sharply 

 winged, smooth; bright orange-red, golden-yellow 

 towards the upper part. 



llab. Philippine Islands; Cuming. 



This little winged species is remarkable for its bright 



orange-red colouring, passing towards the upper part into 



golden-yeUow, distinct in tone from that of A. crocea. 



Species 52. (Mus. Cuming.) 



Avicula aquatilis. Avic. testd elongato-transveisd, in- 

 tense pnrpureo-castaned, postice conspicue alatd, aid 

 longissimd, laid, fortiter plicato-midatd. 



I'he rippled Avicula. Shell elongately transverse, deep 

 purjilc - chestnut, posteriorly conspicuously winged, 

 wing long, broad, strongly plicately waved. 



Ilab. Moluccas. 

 The wing of this little dark purple-ehestnut species is 



much elongated and broad in proportion to the body of 



the shell, and strongly rippled in relief throughout. 



Species 53. (Mus. Cuming.) 



.Avicula Peruviana. Avic. testd ovatd, convexd, sub- 

 globosd, solidiusculd, superne latd, postice parnm si- 

 miatd; castaned, paUide radio td, epidermide fibroad 

 fim.bria.td indtitd. 



The Peruvian Avicula. Shell ovate, convex, sub-glo- 

 bose, rather solid, broad at the upper part, but little 

 sinuated posteriorly ; chestnut, faintly rayed, covered 

 with a fibrous festooned epidermis. 



Hab. Peru. 



A large subglobose shell, of rather solid growth, broadly 

 developed along the hinge-margin, and but little sinuated 

 on the posterior side. 



Species 54. (Mus. Cuming.) 

 Avicula scabriuscula. Avic. testd elongato-traniversd, 

 peramjustd, postice oonspicite alatd ; sordide alba, snb- 

 pellucido-corned, epidermide ptdcherrimd eximie sca- 

 brosd indutd, ad alam undatd. 

 The rough Avicula. Shell elongately transverse, very 

 narrow, posteriorly conspicuously winged ; dull white, 

 subtransparent horny, covered with a beautiful deli- 

 cately scaled epidermis, rippled on the wing. 

 Hab. Australia. 



A characteristic elongately winged species, of a j)alc 

 sub-transparent texture, covered with a very peculiar sca- 

 brous epidermis. 



Species 55. (Mus. Cuming.) 



Avicula producta. Avic. testd subtrigond, convexd, ob- 

 lique elongalo-productd, pei-angustd, postice acute ala- 

 td, pecuUariter prof unde sinnatd; vivide purpureo-cas- 

 taned, epidermide eximie fibrosd versus marginem in- 

 dutd. 



The produced Avicula. Shell somewhat triangular, 

 convex, obliquely elongately produced, very narrow, 

 posteriorly sharply winged, peculiarly deeply sinuated ; 

 bright purple-chestnut, covered towards the margin 

 with a fine fibrous epidermis. 



Hab. Ked Sea. 



This interesting species is chiefly remarkable for its pe- 

 culiarly narrow obliquely produced form, and sharp wing. 



Species 56. (Mus. Cuming.) 



Avicula signata. Avic. testd subtrigono-quadrald, ob- 

 lique productd, postice peratiguste elongato-alald, lati; 

 sinuatd ; nigrieante-castaned, epidermide dense fim- 

 briatd fibrosa indutd. 



The remarkable Avicula. Shell somewhat triangu- 

 larly square, obliquely produced, posteriorly very 

 narrowly elongately winged, broadly sinuated ; black- 

 ish-chestnut, covered with an elaborately festooned 

 fibrous epidermis. 



Hab. ? 



A fine typical species of this winged section of the 



genus, of very dark chestnut-colour, covered with a very 



characteristic festooned fibrous epidermis 



