48 P. T. CLEVE. THE PLANKTON OF THE NORTH SEA, THE ENGLISH CHANNEL, AND THE SKAGERAK. 



Table VI. 



Month 

 Day . 



1 I 1 1 



12 I 18 27 



\ I 



2 2 

 11 16 



2 

 23 



3 



15 



3 

 23 



4 

 14 



4 



28 



5 

 20 



5 



26 





Acartia Clausii Giesbk. . . . 

 Calanug finmarchicus Gunn. . 

 Centropages typicus Keöyee 

 Coryciens anglicus Lubb. . . 

 Euterpe acutifrons Dana. . . 

 Oithona slmilis Claus . . . 

 Paracalanus parvus Claus 

 Pseudocalanus elongatus Boeck, 

 Temora longicornis O. F. Mull 

 Sagltta bipunctata Quoi & Gaim. 

 Noctlluea miliaris Sukiray . . 

 Aoanthochiasma fnsiforme Hkl. 

 Ptychocylis Ehrenbergii Clap. & Laohm 

 Tintlnnopsis beroidea v. acuminata Dad 



T. campanula Ehb 



Phaiocystis Poucbetii Lagh. 

 Ceratiam fusus Duj. . . . 

 C tripos NiTzscH .... 



v. longipes Bail 



Diplopsalia leutioula Bebgh. 

 Peridinium divergens Ehb. 

 HalosphEera viridis Schmitz 

 Asterionella japonica Cl. . 

 Biddulphia mobilensis Bail. 

 Cerataulina Bergonii H. P. 

 Chsetoceros curvisetns Cl. . 



C. decipiens Cl 



C. (borealis var.) densus Cl. 



C. didymus Ehb 



C. Loren zianus Geun. . . . 



C. Sehiittii Cl 



Coscinodiscus concinnns W. Sm, 



C. excentricus Ehb 



Ditylam Brightwellii West 

 Eacampia zodiacus Ehb. . 

 Gainardia flaccida Castk. . 

 Lauderia annulata Cl. . . 

 Rhizosolenia alata Btw. . 



v. corpulenta Cl. 

 R. gracillima Cl. . . 

 R. robusta Norm. . . 

 R. semispina Hensen 

 R. Shrubsolei Cl. 

 R. Stolterfothii H. P 

 R. styliformis Btw. 

 Skeletonema costatum Gkev. 

 Stephanopyxiä turgida Grev. 

 Streptotheca thamesis Shrub 



Planktou-type 



r 



Ne 



+ 

 Ne 



Ne 



Ne 



r 



Ne 



+ 

 Ne 



r 



Ne 



r 

 r 

 rr 

 r 



+ 

 rr 



(Ne) 



(Ne) 



rr 



+ 



(Ne) 



rr 



+ 



c 



+ 

 + 



(Ne) 

 S 

 Ns 



Ne 



Nm 



. 



r 





r 



r 







r 



e 



c 





+ 





r 



r 







+ 



c 



+ 



e 



+ 



+ 



c 





+ 





rr 



r 





r 



r 



r 







+ 



c 



c 





r 



r 



r 



Nm 

 C 



Nm 

 C 



Nm 

 C 



+ 

 r 



+ 



+ 

 + 



ec 

 r 



Nm 

 C 



Nm 

 C 



