3()2 MUURACVT/K, CVSTA'', — XAXTIIIDIUM 



April: ;J2 N. 75' VV, 



May: ?jlr N. 71 W. 



Jiiiu-. 11° S. 10" W.; 1;V N. 5(r VV. to 21" N. ifV^ W. 



./«/?/: 2H-' N. 4(F W. 



Temperature; 23..s,s, mean of IHO obs., max, 2S.ss, min. I4.(!. 



Salinity: Bom, mean of i)7 obs., max. 88. .-,4, min. 32.8i. 



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

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

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

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



XANTHIDIUM HYSTRIX Cl. 



(Kong!. Sv. Vetensk. Akad. Handl. Vol. XXXII n. 8 pag. 21.) 



ISiKS March.: 21^ N. IH" w. 

 Oiiohrr: bT N. IH" W. 

 Xovcinbcr: oH" N. 17^ W. 

 December: i-4- N. 57° W 

 Xoveinbrr: 51° N. 13 and 2K^ W. 



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

 Salinity: 34.-is, mean of 3 obs., max. 35. u, min. 32. 7i. 

 Plankton-type. This form occurs sparingly, but frequently, 

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



XANTHIDIUM MULTISPINOSUM Moeb. I 

 V (Funfte Ber. d. Kommiss. zu Kiel pag. 124 PI. VIII fig. 62—65.) 



189« July 62° N. 0' W. 



AitguHt: (KP N. 3° E. 



Scptcmbvr: Hl° N. 2° W 



November: 51)° N. 23° W. 

 1899 September: 56° N. 23° W. 



October: 56° N. 23° W. 



Temperature: lO.s to ll.s. 

 Salinity: 35 to 35.s2. 

 Plankton-type: S. 



