Mr. A. Adams on neiv species of Sinusigera. 125 



which I observed it (both in the pupa and imago state) in con- 

 siderable abundance at the Feijaa de C(5rte, early in August 1850. 



EXPLANATION OF THE PLATES. 



Plate IV. 



1. Misoleptus Maderensis, W. 



2. Exetastes peregrinus, W. 



3. Ephialtes lateralis, W. 



4. lineatus, W. 



5. Lissonota dorsalis, W. 



6. Perilitus debilis, W. 



7. Scelio minor, W. 



8. Ceraphron parvulum, W. 



Plate V. 



1. Dilophus Maderae, W. 



2. Scatopse tristis, W. 



3. There va aana, W. 



4. Paragus mundus, W. 



5. Tetanocera inclusa, W. 



6. ?Walkeri, W. 



7. Drosophila repleta, W. 



8. Oscinis signata, W. 



9. Gymnopa clara, W. 



XIII. — Notice of three new species of Sinusigera^ a genus of 

 Brachiocephalous Mollusks, By Arthur Adams, F.L.S. &c. 



To the Editors of the Annals of Natural History. 

 Gentlemen, Hong Kong, Nov. 12th, 1857. 



While traversing the Indian Ocean and China Sea, on our 

 passage from the Cape to Hong Kong, the towing-net was put 

 over whenever the state of the weather and the speed of the 

 vessel permitted. By this means a slender linear area of those 

 portions of the surface of the high seas crossed by us was im- 

 perfectly examined. The results of such limited investigation 

 have already enabled me to make you acquainted with several 

 very interesting forms of pelagian Mollusks; and I now avail 

 myself of your pages to notice the existence of three new species 

 of the Sinusigera of D^Orbigny or Cheletropis of Forbes. 



1. Sinusigera vitrea, A. Adams. '''^ 



S. testa vitrea, semipellucida, perparva; spira elata, conica; anfracti- 

 bus quinque, ultimo striis undulatis longitudinalibus ornate, ad 

 peripheriam carina valida cincto et carina spirali antice instructo ; 

 labio arcuate, in mucrene simplici desinente ; labro postice valde 

 sinuate, margine incrassate, lebe rotundato in medio preducto, 

 lobe postice spina angulata armate. 

 Hah. in Mare Sinense. 



Shell vitreous, semi-pellucid ; spire conical, longer than the 

 aperture ; whorls five, the last marked with longitudinal, undu- 

 lating strise, and encircled with a prominent filiform keel at the 

 periphery, and with another spiral ridge at the fore part ; mner 

 lip curved inwards and regularly arcuate, ending anteriorly in a 

 simple point ; outer lip deeply sinuated, the thickened margin 

 posteriorly forming a rounded lobe, the upper or hind part of 

 which is produced into a shoH angular process. 



