THE SCHIZOPODA. HI 



not taken in water colder than 40° F. (8° C. ca.), and occurred in water of 63° F. 

 (17° C. ca.). 'J'lie temperature range of Euphausia llulleri, not Boreal, was about the 

 same. 



Other species were not taken in sufficient abundance or in sufficiently defined strata 

 to afford alDsolute evidence. 



Dr. Fowler has called our attention to the remarkable abundance of specimens in 

 haul 31 b, and proposes, we understand, to advert to it in his own analysis of results 

 (p. 122). We note it here merely as an illustration of the difficulty of assigaing, in 

 attempts to take a censiis of Plankton, its true value to the catch of each net. Close 

 inshore, every collector knows that by hauling a net through a seam of tide the catch 

 will often be infinitely greater than that of hauls made even a few yards on either side 

 of the seam. Further to sea, but still within the littoral area, similar experiences of 

 quantitative difference of catch within comparatively small areas not defined by any 

 o])vious physical phenomena are by no means unfamiliar. Here we have an oceanic 

 instance, to which we would invite the serious attention of any who may be disposed to 

 regard the solution of marine bionomical problems as capable of absolute mathematical 

 solution. 



[In the following General Table of Distribution (pp. 112-113), the first three hauls 

 refer to the Mesoplankton TraAvl, the remainder to "comparable" hauls * [supra, p. 5). 



In the genus Slylocheiron, where every larva has been as far as possible identified, the 

 numbers before a + sign indicate the adults, those after it the larvae. In the remaining 

 cases, the younger larvae have not yet been completely worked out (p. 101), and only 

 conspicuously identifiable larvse have been recorded by an L. — G. H. F.] 



* 21 a, made with a closing-net pulled up direc-tly to the surface, should liavo beeu classed as " non-comparable." 

 Tlio following were the captures of the " non-compurablu " hauls : — ■ 

 2\d: 100-0 fathoms : 1 Sli/Iocheiron Suhmii. 



27 rt and a': 1250-0 fathoms : 2 Eacopia tmijiiicidata, 1 BeiitJu'iqihausiu sp., 1 Xemalubrachiou boopis, 5 Sti/lo- 

 cJieiron Suhmii, G Euphausia Mi'dleri. 



SECOND SKRIES. — ZOOLOGY, VOL. X. 19 



