1890.] Zoology. 108 5 
The second paper, by Dr. W. H. Gaskell,* is fairly appalling. In 
two former papers ® we had been favored with a foretaste of this won- 
derful production, but here it appears in detail so far as the first chap- 
ter isconcerned. Space will permit but a mere outline. Like Dr. 
Patten, he seeks the ancestor of the vertebrates in the arthropods, but 
there all unity ceases. The crustacean nervous system has grown 
around the alimentary canal, the latter producing the ventricles of the 
brain and the central canal of the spinal cord. The crustacean gill- 
bearing legs have been infolded, and give rise to the vertebrate gill- 
arches, while from the cavity thus formed the vertebrate alimentary 
canal has grown backward. The pituitary body is the green gland. 
Amphioxus in Tampa Bay.—Since some recent attempts to 
obtain Amphioxus in Chesapeake Bay have been unsuccessful, and 
since there is considerable difficulty in securing it from other known 
stations, as Beaufort, N. C., the Bermudas, the West Indies, etc., it 
may be of interest to know that specimens were abundant and easily 
secured at Port Tampa, Fla., in March last. The “Port” is eight 
miles from the city of Tampa, and consists of a railroad trestle-work 
running out nearly a mile over the shallow water to the wharf where the 
Havana steamers land. Working from a boat, with only a dip-net, 
in water from four to six feet deep, some specimens could be obtained 
with every dip. They were upon the surface of the clean sand. The 
ground worked over was southward from the wharf, and extended 
about a mile along the margin of the ship-channel, which is marked 
by buoys. The location is so far from shore, and so far from disturb 
ing agencies, that it might be expected to yield a constant supply. A 
light dredge, with fine-meshed bag, would be the most efficient col- 
lecting instrument. The specimens were from one to two inches in 
length.—ALBERT A, WRIGHT. 
4 Quar. Jour. Micros. Sci., XXXI., p. 379, 1890. 
5 Jour. Physiol., X.; Brain, XII., 1890. 
