,tmn with a lateral lob( the tergal margin, rergum V-shaped Carina 



simpl] 1 with tli< - umbo al a shorl distance from the apex. Upper latus irregularly penta- 



i-median latus irregularly wil shaped. Rostrum small triangular. 



is represented by ;i single specimen only. 



rhe capitulum has an elongate oval shape, sloping gradually into the peduncle. rhe 



hitinous interspaces, their colour is not white but yellowish; they are 



bj a thin chitinous membrane. The occludent margins of scutum and tergum form 



intinuous arch; the apex ol the capitulum is distinctly recurved. 



tlv calcified -.ent u m consists of an elongate occludent segment, which is 



st at the base and a narrow tergal segment. 



Tl.. u m consists óf two segments of about the same width, the carinal segment 



much longer than the occludent segment. Apex point distinctly recurvi 



irina simply bowed, for of its length with a flat roof bordered on each side bj 



a ridge. rhe remaining ' '«■*■ is between the umbo and the apex of the valve and is not flat 



but bowed laterally. 



Upper 1 a t u s * irregularly pentagonal with the tergal margin longest and the umbo 



pointing in the direction of the tergal segment of the scutum. 



( >f the valves of the lower whorl, the triangular rostrum (fig. 8«) is by far the 



smallest, the carinal latus the largest. The latter valve has the umbo at the outer angle 



ath the carina. The infra-median latus is relatively large; it is wine-glass-shaped, the 



umbo being placed below the middle and the main growth being upwards. Rostral latera 



nearly twice as long as broad, umbo placed at the corner where scutum, rostrum and rostral 



latus are nearest to one another. The exact shape of the valves may for the rest be judged 



from the drawing (PI. VII, fig. s/". 



Peduncle with the upper end widest, slightly narrower at the base, flattened, more 



than half as long as the capitulum. Scales large, placed transversely, not numerous, forming 



ther about 7 longitudinal rows. The scales are much nearer to one another in the upper 



end than downwards. 



Si /e. The total length of the specimen was 13,7 mm., that of the capitulum alone 8,7 mm. 



only specimen was loose to judge from the objects taken along with it I imagine 



that it has been attached to a shell or piece of stone. 



Complemental male not observed. 



The specimen was collected at : 



Stat. 45. April 6, 1899. Lat. 7 24 S., Long. ti8 1 5 .2 E. Depth 794 m. Bottom: fine 

 mud, with som<- Radiolariae and Diatomeae. 



Observation. At th<- same Station 3 other species of Scalpellum wen- collected, viz. 



polymorphum, Sc. chitinosum and Sc. crinitum. 



12. Scalpellum polymorphum. PI. VII, fig. 9 — 11. 



Valves fourteen, covered by membrane, imperfectlj calcified in some of the specimens. 

 Carina simply bowed, root' bordered on each side by a stronglj developed ridge; umbo ver) 



80 



