6 MORGAN. (VoL. IX. 
Andrews, who remained longer, promised to make a new 
attempt when the low tide came again late in the afternoon. 
This was done, and Dr. Andrews tells me that they were 
again able to procure the worms. 
A word as to the locality on Bimini where Balanoglossus is 
to be found. In the south-west corner of the lagoon, and just 
in front of Alicetown, is a small islet, Stokes Cay, with exposed 
sand flats at low tide. Here on the west side they were found 
in numbers. Again on the southern shore of South Bimini 
near its south-west corner is another locality for them. A 
more distant point is at the south-eastern end of North Bimini 
at East Wells. I did not get there, but Dr. Andrews procured 
Balanoglossus there and reports finding a large form, with red 
(half) bands on the body as in the Jamaica form. 
Great difficulty was found in preventing the larvae from con- 
tracting when killed. One method alone gave satisfactory 
results. The larvae were put into an extremely dilute solution 
of lactic acid and left there for a few minutes until there was 
no response to stimuli. They were then hardened in Picro- 
sulphuric acid or Picro-salt solution, and the usual processes 
followed. This method was especially successful for stages 
after the larvae had entered the sand. The dead and hardened 
worms retained the shape of the living worm almost perfectly. 
The lactic acid did not give favorable results with the adults, 
owing apparently to the large size of the worms, since 
maceration began at the surface before the body muscles were 
paralysed. 
We landed on Bimini June 16, 1892, and I left July 9. 
Between these dates the material was collected. I am indebted 
to Dr. Andrews and Dr. Bigelow for preserving and sending to 
me additional larvae caught in the tow after my departure. 
Stupy OF SURFACE VIEWS. 
The series of figures given from Fig. 1 to Fig. 11 are 
intended to show the main features in the growth and meta- 
morphosis of this Tornaria. They are all drawn to the same 
scale from the living embryos. A careful camera sketch was 
made in each case to give the outline and relative proportions 
