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pi. 51, fig. 5) the largest specimen has a shell of 10 Mill, in length, against 21 Mill, in the 

 figure of PiLSBRY, the foramen is not so abruptly dilated posteriorly, but this may perhaps 

 depend on age, as this character is still less conspicuous in the smallest specimen from the same 

 locality and in those from Stat. ? and 282, which are rather doubtful, being very small. 



var. eloiigata n. var. PL VII, fig. 1. 



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



Shell more elongated, grey with darker markings, sculpture in the front part of shell 

 more regular. 



Length of shell 14, breadth 6 Mill. 



Distinguished from the type by its length, which is nearly 2Y3 times the breadth, in the 

 figure of Adams, it is only about 2 times as long as broad, the colour agrees with Adam's 

 description. The animal is dark grey, white at the sides, darker on the back, the anal tube 

 black, the head light grey, with the tentacles and border of muffle white, foot yellowish. 



Glyphis Carpenter. 

 \. -Glyphis siibcalyculata n. sp. PI. VII, fig. 2. 



Stat. 310. 8°3o'S., 1 19° 7'. 5 E. 73 M. Sand with few pieces of dead coral, i Spec. 



Shell ovate, elevated, conical, with concave slopes, especially the posterior one, yellowish 

 with a green tinge in some parts, especially on the posterior slope, and a few scattered, short, 

 purple-brown streaks; the sculpture consists of eleven prominent, radiating ribs, of which those 

 on the posterior slope are strongest, the interspaces on the front-side each with 3 riblets, of 

 which the middle one is the strongest; on the sides and posterior slope they amount to seven, 

 of which the fourth is stronger than the others, the second and sixth are thinner, the first, 

 third, fifth and seventh are the thinnest. The ribs are crossed by very fine growth-striae and by 

 about 20 concentric lirae, forming rather conspicuous scales on the radiating ribs, the strongest 

 on the posterior 3 ribs. Foramen inclined towards the front, keyhole-shaped, rounded in front, 

 enlarged behind, with 2 inconspicuous denticles at each side. Base oval, margin crenulated and 

 angular, especially at the ends of the 3 posterior ribs; interior white, with grooves corresponding 

 to the principal ribs; hole-callus thick, truncated behind, with a rather deep pit behind the 

 truncature. 



Long. 20, lat. 13, alt. 9, length of front slope 6^3, of posterior one riYa- of perforation 2 Mill. 



This new species is allied to G. calyculata Sow., but differs by the concave posterior 

 slope, which is convex in G. calyculata, by the elongated keyhole-shaped perforation, by the 

 smaller number of prominent ribs, which are much differentiated, especially on the front part, by 

 the colour, which is yellowish instead of pink, by the strong hole-callus, with shallower pit behind. 



I have used the generic name Glyphis though Pilsbry has shown (Nautilus, Vol. V, 

 p. 104) that it ought to be FisstLridea Swains. As he has however applied this name to another 

 group in his Manual of Conchology, and many authors have afterwards used the name Glyphis, 



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