3H2 MURRACYTyl<:, CYST.'T: — xanthidum 



April: 32^ N. To W. 



May: 35 N. 74^ W. 



Jufi,-: W S. 10 W.; IT) N. 5(1 W. to 21 N. ifr W. 



July: 2S- N. 40= W. 



Temperature: 23. ss, mean of 130 obs., max. 2S.33, min. 14.r,. 



Salinity: 35.9;!, mean of ^)7 obs., max. 38.54, min. 32.r.i. 



Plankton-type. Noted from Red .Sea and the Indian, Pacifie 

 Oceans. It occurs in the whole tropical Atlantic, from 25^ S. to 

 somewiiat north of 40 N., exceptionally to the Faroe Channel. Not 

 found between the Azores and the European coast. — 1). 



XANTHIDIUM HYSTRIX Cl. 



(Kongl. Sv. Vctensk. Akad. Handl. Vol. XXXII n. 8 pa-. 21. 



tSllS March: 21 - N. IS^ W. 

 (h-lohcr: bl N. 1S- W. 

 Xovcin /)(•/■: 5()- N. 17' W. 

 Deci'inlx'r: 1-4° N. 57= W. 

 Xorcnihcr: 51= N. 13 and 2S- W. - 



Temperature: 12, mean of 4 obs,. max. 15, min. 11. 

 Salinity: ;>4.4.s, mean of 3 obs., max. 35.44, min, 32. n-. 

 Plankton-type. Tiiis form occurs sparinjrly. but frequently, 

 in the Tripos-plankton of the North Sea. — N. 



XANTHIDIUM MULTISPINOSUM Moeb. 



(Fiinfte Ber. tl. Ivommiss. /.u Kiel jiag. 124 I'l. V'lII (1.2. 62—65. 



ISilS July 62- N. W. 



Artf/Ksf: (){) N. 3' E. 



S,-j,f,'/,,l>rr: (ir N. 2= W. 



Xovoinbcr: biS' N. 23= W. 

 IS^H) Srj,lr/nh('/-: 5()= N. 23^= W. 



(),if,/,rr: bVr N. 23= W. 



Temperature: lo.s to 11..^. 

 Salinity: 35 to 35. 3l'. 

 Plankton-type: N. 



