

1891.] Embryology. ` 1137 
Zoological News.—M. Aug. Lameere, professor in the Univer- 
sity of Brussells, has published ê a very readable paper on the ‘Origin 
of the Vertebrates.’ He defends and amplifies Sedgwick’s well-known 
hypothesis, and like him derives the vertebrates, and by implication 
metamerism, from the Actinozoa. 
C. Dwight Marsh publishes’ a list of the deeper water Crustacea in 
Green Lake, Wis. He enumerates fourteen species, of which a Bos- 
mina is new and Diaptomus minutus was before known only from New- 
foundland. 

EMBRYOLOGY.! 
A New Larval Form from Jamaica.—The Marine Labora- 
tory of the Johns Hopkins University was situated during the summer 
of 1891 on the Island of Jamaica, at a point on Kingston Harbor 
called Port Henderson. While a member of the party I obtained the 
larva described below. On the morning of June 24th, while examin- 
ing the tow-stuff from the surface net, Mr. Charles Taylor, of Kings- 
ton, discovered the larva. He made a careful sketch of it from the 
living animal, and it is from this largely that the accompanying figure 
was subsequently made, The larva was turned over to me, but 
unfortunately on account of its’ minute size it was lost during the 
hardening process, so that all opportunity of a later and fuller exami- 
nation is gone. Nevertheless, as I am quite sure the figure is accurate 
as far as it goes, and as the chance of finding another larva is not very 
good, I have decided to figure it, with a brief account of its capture. 
Although there is no record as to the time in the morning when the 
tow was made, yet in all probability it was between the hours of six and 
nine A.M. About six or seven o’clock the land breeze that had been 
blowing during the night ceased, and there was generally a calm inter- 
val of an hour or two before the sea breeze (the trade) forced it way 
6 Bulletin Société Belge de Microscopie, XVII., 1891. 
7 Zool. Anzeiger, XIV., 275, 1891. 
; Lee Dr. T. H. Morgan, Bryn Mawr College, Bryn Mawr, zie 
-o Ak TERATE 

