n>: 



The single specimen was collected 



N . mbei 4., 1899 Lat. 1 24 S., Long. 124 .1 Dépth 2798 m Bottom: solid, 

 bluish grey mud with Foraminifcrae. 



Observation. This species is no doubt nearly related to Si . trapezoideum n. sp. and 

 t,. Sc. truncatum Hoek. Under Sc. trapezoideum 1 give the reasons why I tliink it better to 

 consider them .is three different species. Scalpellum truncatutn Hoek was collected by the 

 -1 hallenger" .1 single specimen also at a depth of 2520 m., 12 8'S.L. and 1 15 ' io' E.L. and 

 therefore maj also be considered as au inhabitant "f the Indian Archipelago. 



5 alpellum trapezoideum n. sp. PI. VIII, fig. 6. 



Valves thirteen not covered by membrane. Tergum with the occludent margin straight 

 and tlu- carinal margin distinctly divided into tw<> parts. Carina simply and not strongly bowed 

 with the apex at the umbo; roof flat bordered by ridges; sides considerably broader in the 

 upper than in the lower part. Infra-median latus narrow with the umbo at the apex, hour-glass 

 shaped. Umbo of the carinal latus near the base, slightly projecting beyond tlu- line of the 

 carina. Scales of the peduncle narrow. at some distance from one another, projecting beyond 

 the surface. 



This species is represented by one specimen only. 



The capitulum is broad, much loss than twice as long as broad, flat in the upper, 

 thicker in the lower half: the straight occludent margin of the tergum forms an angle with the 

 ludent margin of the scutum. Valves not covered by membrane, surface showing the growth- 

 ridges, but not so distinct as the furrows. 



The scutum is elongate, with the umbo at the apex. The apex is very slightly produced, 

 but cannot be said to project over the tergum. The form of the scutum is nearly the same as 

 in Sc. discolor, the lateral margin being however not so strongly convex. 



The tergum has the shape of a trapezium: the perfectly straight occludent margin forms 

 an angle of about 8o c with the upper part of the carinal margin, which runs nearly parallel to 

 the scutal margin. The length of this part of the carinal margin is about ' , l! ' the whole length 

 of that margin: where it meets the much longer and slightly convex lower part of the same 

 margin a small excrescence is formeel, just above the place where the apex of the carina 

 touches the tergum. 



The carina is simply and not strongly bowed, with the umbo at the apex. The flat roof 

 increases considerably in width from the apex to the base and is bordered by distinct ridges. 

 The sides of the carina are considerably broader at the upper extremity than in the lower part. 



The upper latus has the umbo near the apex, the scutal margin hollowed out and 

 the carinal margin very short. It is pentagonal as it has a short basal margin separating it 

 from the infra-median latus. and a rather long basal margin along the carinal latus. 



The r<>stral latus i-, quadrilateral with the upper and basal margins of about the 



fth. 

 The infra median latus is narrow; its shape is that of an irregular hour-glass. the 



