12 P. T. CLEVE, ON DIATOMS FROM THE ARCTIC SEA. 



35. Chsetoceros Wighami Brightw CSl. J. IV, pag. 108, 

 T. A II, lig. 19 — 36). Frustades quadrate, connected into chains 

 Avhich have verv narrow foramina. 



Northern Åtiantie (Lat. 60° 25' Long. 19' 50' Th. Fries). 

 Davis Strait Lat. G2^ 36' Long. 52^ 50'. (Th. Fries). 



36. Chaetoceros boreale Bayl. (Xew Sp. of Diat. Smith- 

 son. Contr. vol. VII, pag. 8, fig. 22, 23). Xortheru Atlantic 

 Lat. 58 N. Long. 32 Y. (P. Öberg). 



^ ar. Brightii-ellli n. var. Cl. Awns with smaller spines; 

 frustules densely concatenated. Height of the frustule 0,0 2 2 

 m.m. breadth 0,0 2 7 ni.ni. Northern Atlantic Lat. 60" 25' 

 Long. 19' 50'. (Th. Fries). Davis Strait Long. 61° 45' Lat. 

 53° 43'. 



Nearly related to Ch. horeale Bail, but has smaller spines 

 on the awns. Pl. II, fig. 7 a — e. 



37. Chsetoceros Peruvianum Brightw. (M. J. IV, pag. 107, 

 Pl. VII, %. 16—18). Northern Atlantic Lat. 60° 25', Long. 

 19° 50'. Davis Strait Long. 61° 45' Lat. 53° 43'. 



Somewhat rare. — Found also in guano from Callao and 

 on the sea of Java. 



38. Syndendrium Diadema Ehb (M. Geol. Pl. XXXV A. 

 18, fig. 13, Btw. M. J. R', Pl. VII, fig. 49—52). Xorthern 

 Atlantic Lat. (^0° 25' Long. 19° 50' rare. Found before on 

 the coast of Great Britain, in Peruvian guano and in the 

 sea of Kamtschatka. Syndendrium diadema is certainly no- 

 thing but a sporaugial form of some species of Cha>toceros. 



39. Dicladia Groenlandica Cl. N. Sp. Conical with bifid 

 top, having at its ends simple or branched spines. Breadth 

 0,11 36 m.m. 



Davis Strait great depth, somewhat rare. 

 This form seems to be the same as Periptera Bail Sm. 

 Oontr. II, 1851. ]\Iicrosc. exam. of soundings, fig. 53. 



? 40. Novilla fastuosa (Sm) Cl very rare, found only in 

 the sample from Kings Bay. In most seas it is one of the 

 most common diatoms. 



?41. Surirella lata Sm (Syn I, pag. 31, T. IX, fig. 61) 

 found together Avith S. fastuosa in the mud from Kings Bay. 



I 



