288 Mr. F. 8. Conant on Two new Chetognaths. 
to a large number of additional sand-eels at various stages. 
The greater number of them merely confirm the deductions 
given here; but there are one or two exceptions. A few, 
such as 
“ Liston Bank, 9 fathoms, 13th April, 1891.—Sand-eel, 
15 millim.,” 
have enabled me to carry the upper curve-line (Table IL.) 
further up than by Table I. only. 
There are, again, two cases— 
“St. Andrews Bay, 20th May, 1895.—Sand-eel, 3 millim. 
“St. Andrews Bay, 6th June, 1895.—Sand-eel, 7 millim.” 
—which have a peculiar importance. ‘They are the only two 
instances of post-larval sand-eels of so small a magnitude 
occurring in May or June (see Table II.), and indicate that 
the two spawning-periods are only those of the predominating 
number, and that isolated cases may occur which bridge over 
the hiatus between them. At the same time it is just possible 
that fresh facts may come to hand and show that these cases 
are so numerous as to warrant our regarding the spawning- 
habit of the sand-eel as being prolonged over a period from 
January to June inclusive. 
I have, in conclusion, to thank Prof. M‘Intosh for kindly 
giving me many valuable opportunities for investigating this 
interesting subject. 
XLII.—Deseription of Two new Chetognaths (Spadella 
schizoptera and Sagitta hispida). By KF. 8. Conant *. 
WHILE at Bimini, one of the Bahama Islands, in June 1892, 
Dr. Andrews obtained three specimens of an unknown Cheto- 
gnath, which have been very kindly placed at my disposal. 
As it proves to be a somewhat aberrant form, a description 
may be not without interest ; toit may be added a description 
of another new species, which we found in abundance at 
Beaufort, N. C., from April to July of 1894. 
1. Spadella schizoptera, sp. n. 
The specimens were taken in the tow-net at rising tide, and 
belong to that class of Cheetognaths whose life is spent for 
’ 
* From the ‘Johns Hopkins University Circulars,’ vol. xiy. no. 119, 
pp. 77, 78. 
