142 



Stat. 49". Sapeh-strait. 69 M. Coral and shells. I Spec. 



Stat. 164. i°42'.S S., I30°47.5 E. Halmahera Sea. 32 M. Sand, small stones and shells. 1 Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to 36 M. Sand, coral and mud. i Spec. 



The largest specimen from Stat. 164 measures 16 Mill, in length, that from Stat. 313 

 only 87^ Mill. 



5. Amphiperas concinjiimi Adams & Reeve. 



Adams and Reeve. Voy. Samarang. Moll. p. 22, PI. 6, fig. 8. _ 



Reeve. Conch. Ic. Vol. XV, Ovulum, fig. 21. 



Weinkauff. Martini-Chemn. Conch. Cab. Ed. II, Vol. V, Ovula, p. 182, PI. 47, fig. 5, 8. 

 .Tryon. Man. of Conch. Vol. VII, p. 249, PI. 3, fig. 59, 60, 74. 



Stat. 252. Near "Taam-island. 27 M. Coralsand. I Spec. 



6. Amphiperas roseomandatum n. sp. PI. XI, fig. 10. 



Stat. 98. 6°9'N., 120° 21' E. Sulu Sea. 350 M. Sand. I Spec. 



Stat. 164. i°42'.5 S., i30°47'.5 E. Halmahera Sea. 32 M. Sand, small stones and shells, i Spec. 



Shell small, pyriform, strongly angular on the back, the extremities elongate, thin, 

 transparent white, with rose-coloured, irregular spots, arranged in three bands, one near the spire, 

 one near the centre before the angle, the third near the anterior part, moreover the extremities 

 are rosetinted. Sculpture consisting of rather broad, waved, impressed striae, Vvfhich are shallow, 

 but at least half as broad as the lirae, they are crossed by fine growth-striae, which are partly 

 stronger, so as to render the surface here and there cancellated; the angle is placed on the 

 posterior half, the shell is rapidly contracted towards the posterior part, regularly contracted 

 towards the anterior part. Aperture narrow, angular, with a short canal at both extremities; 

 outer margin thickened, with numerous fine teeth on the front part, much stronger towards the 

 spire, where they cross the thickened margin and render it crenulate on its external margin, 

 being visible in the dorsal view; columellar margin with a crenulate callus behind, a fold borders 

 the front canal, this margin is excavated internally; a thin layer of enamel covers the columellar 

 side of the shell. 



Long. 87,, lat. 5 Mill. 



This species is nearly allied to A. concinnum, but differing in many particulars, the shell 

 is stronger angulate, more rapidly contracted towards the spire, a line from the angle of the 

 back towards the spire being nearly straight in A. concinnum^ strongly excavated in the new 

 species, the striae are much coarser, the lirae narrower, the teeth of the outer margin are 

 stronger, the shell is thinner and different in colour. 



The specimen from Stat. 164 is still young, the teeth on the thinner margin are not 

 yet developed. 



7. Amphiperas striahilutn Sowerby. 



Sowerby. Species Conchyhorum. Vol. I, part I, Ovulum, p. 7, fig. 38. 

 Reeve. Conch. Ic. Vol. XV, Ovulum, fig. 28. 



34 



