REPORT ON THE C1RK1PED1A. 113 



Scalpvll mn minutum, n. sp. (PL V. fig. 12). 



Valves thirteen, with their surface covered by thin membrane. Valves thin and britl le. 

 Carina simply and not very strongly bowed, with the umbo al the apex. Infra-mediaii 



latus oblong quadrangular. Upper latus pentagonal. 



This very small species is represented by a single specimen only. It comes near to 



Scalpcll ma novce-zelandia> , and belongs to the same division of the genus as that species, 

 and as ScaVpellum jkwwm. It may he distinguished from these species by the form of 

 the carina almost at first sight. 



The capitulum is very flat, the valves are covered by very thin membrane, and do nol 

 show distinct ridges of growth. 



The scutum is elongate, quadrangular, almost twice as long as broad. The umbo is 

 at the apex, which is slightly protuberant beyond the occludent margin of the tergum. 



The tergum is stout, and surpasses the scutum in area. Its apex is recurved, the 

 occludent margin being slightly arched. 



The carina is not so long as in Scalpdlum flavum, and is almost straight. The roof 

 is flat, and does not increase considerably in width from the upper to the lower extremity. 

 The umbo is at the apex, which almost penetrates between the two scuta; the roof shows 

 a small thickened portion near its apical extremity. 



The v/pper latus is pentagonal, being truncated at the angle formed by the basal and 

 scutal margins. 



The rostral latus is triangular ; its rostral margin is arched, its scutal margin hollowed 

 out, its lateral margin arched also. 



The infra-median latus is narrow, being only slightly wider near the upper extremity . 

 It is an impossibility to distinguish the place where the umbo is seated ; it is probably 

 close to the base. 



The carina! latus has an irregular shape. Its carina! margin is hollowed out in 

 the superior portion, and its umbo is situated at a considerable distance from the base. 

 Hence, there is a well-developed inferior portion of the carinal margin also. Lateral and 

 upper margins of the same length and almost straight. 



Length of the capitulum, G mm. 



The peduncle is very short, not quite 2 mm. Some very small scales arc developed 

 at the upper extremity of the peduncle ; they are wanting near the lower extremity. 



Structure of the animal within the capitulum not studied ; coinplernental male not 

 observed. 



This species was taken at Station 302, December 28, 1875 ; lat. 42° 43' S., long. 82° 

 11' W.; depth, 1450 fathoms; bottom temperature, 1°'5 C; bottom, Globigerina ooze. 



Observations. — I cannot say with certainty whether the specimen taken at Station 



(ZOOL. CHALL. EXP. — PART XXV. — 1883.) Eb 15 



