ÖFVERSIGT AF K. VKl'ENSK.-AK A I). FÖUll ANI)LrN(J AK 1 ÜOO, N:() S. '.)2J> 



Castr. Chali. Rep. Diat. p. 77; 188(5), oc.cuiTed at 42 S. 

 3" W.; 44 S. 9 E.; 45° S. 34° E. — Jörgensen fbunrl this 

 species once near Bergen. 



ChsBtoceros OsteiiMdii Cl. (K. Sv. Vet. Ak. Handl. XXXIV 

 N. 1, Pl. VIII f. 19). Rare specimens were found at 45 S. 

 29 E.; 43 S. 73 E. to 41' S. 80° E. 



Chaötoceros perimanus Btw. This species is very variable, 

 and it seems to me impossible to distinguish C. pe7mvianu^ from 

 C. volans Schutt. The variety gracilis Schröder (Mitth. d. 

 Zool. St. zu Neapel B. XIV. 1. Pl. I. f. 5) occurred frequently 

 together with other forms in samples from the sonth Atlantic 

 and Indian Ocean. C. curvatum Castr. (Challeng. Rep. Diat. 

 p. 78) seems to me to represen t a form of C. peruvianus. 



More or less abundant in nearly all samples from 41" S. 

 6 W. to 32 S. 91° E. 



Chaetoceros polygonus Schutt (Ber. d. Deutsch. Bot. Ges. 

 XIII p- 46). This form scarcely differs from C. skeleton Schutt 

 and C. audax Schutt, the latter representing isolated (primordial) 

 cellules. On the other hand, some varieties are nearly connec- 

 ted with C. dichceta Ehb. (conf. Schutt), that also belongs to 

 the group of C. atlanticus. This form (inclusive C. skeleton) was 

 found from 44^ S. 4° E. to 45^ S. 34° E. and at 41°— 40° S. 

 80°— 82" S. 



Schutt found this form in the Guinea Current. I have 

 met with it in the styli-plankton of the temperate Atlantic. 



Chaetoceros Scliiittii Cl. Some few specimens, which seemed 

 to belong to this species, were found at 45° S. 29° E. 



C. scolopendra Cl. Rare specimens were found at 45° S. 

 34° E. 



1 have once met with this species in the Cape Verde region. 

 It frequently occurs in the northern Atlantic together with arc- 

 tic species. 



Corethron criopMlum Castr. (Chall. Rep. Diat. Pl. XXI, 

 f. 12, 14, 15, 1886. — C. Ivjstria; Bensen, Fünft. Ber. Kommiss. 

 in Kiel 1882—86 Pl. V fig. 49. — Cl. Report Fish. B. for 



