TYPE LOCALITY Philippines. Mactan Island. Punta Engaño. Malingin. 150 m deep. HABITAT AND RANGE Collected on a fine gravel bottom mixed with sandy mud at a depth of 150 meters. Only known from the type locality. DESCRIPTION Shell almost as broad as high, triangular in general out- line, thin shelled and not exceeding 3.8 mm in total height. The protoconch is quite impressive, tilted, the upper top is broken off but three protoconch whorls remain: golden brown in color with a large number of serrated axial ribs, oblique, and as sunken into the teleo- conch. This teleoconch has 4½ whorls. The suture is deeply incised. The sculpture is complicate: On the whorls appear two strong spiral ribs and the shape of the whorls is dominated by these: quadrangular in outline. The subsu- tural area is convex, the base is convex too, but less. The area between the two dominant spiral ribs is almost flat. On the subsutural area appear 3 secondary ribs, linked together with numerous axial ribs, and where both the spiral and axial ribs cross, a small knob is formed. The same type of knobs appears all over the shell where both types of different ribs cross. Between the two dominant spiral ribs, on the vertical area, are three secondary ribs, with even smaller ones in between. And on the bottom part of the body whorl there are 6 secondary spiral ribs. There is a wide and deep umbilicus. The umbilical path is covered with 4 lines. The aperture is merely round in shape with a tendency to become quadrangular. The lip is simple, not thickened and inside the aperture one sees the outer sculpture shining through. The overall coloration, except the protoconch, is ivory, but there are alternating white and brown blotches visible on the two dominant spiral ribs. ETYMOLOGY Named in honor of Philippe Bouchet. Philippe Bouchet contributed not only tremendously to the taxonomic and nomenclatural malacological scenery of the latest two decades, he also organized dozens of major exploring expeditions that led to the discovery of many thousands of new species worldwide. It is with much pleasure that we add one more species to the already many existing "boucheti".

COMPARISON AND REMARKS None of the Indo-Pacific Nystiellidae resembles this spe- cies. However, in the Atlantic, there is a species which is quite close in size and shape to Iphitus boucheti n. sp. This is Iphitus robertsi Sabelli & Taviani, 1997, recorded from the Gulf of Mexico and the Canary Islands. Rolan figures a shell in color (2011). While this species is very close to I. boucheti n. sp., differences are obvious: I. boucheti n. sp. is more than twice as large as I. robertsi. The shell is broader in shape with less pronounced spiral ridges on the borders of the square shaped body whorl. The shoulder is convex in I. boucheti n. sp. while straight in I. robertsi. The vertical area between the spiral ridges is much bigger in I. boucheti n. sp. while very small in I. robertsi. The color pattern has some resemblance, but I. boucheti n. sp. is more yellowish and the dark spots on the spiral ridges are more numerous and less contrasting than in I. robertsi.