176 [January, 



head and into the loop, obscuring moi'e or less these parts. At 9 a.m., 

 these granules clearing away somewhat, so that final curve of tail 

 could be seen commencing, and apparently clearing away the yolk- 

 granules that it may have forced into the centre loop. At noon, the 

 tail more decidedly working round, the anal prologs projecting plainly 

 into the loop. Soon after noon the first larval movement was noticed, 

 being a decided heaving of the abdominal segments throughout their 

 length, leaving the anal prolegs more compact in the centre, while the 

 whole body seemed to get at once closer to the now narrowing annulus, 

 5.30 p.m. : this movement continued in others, as the final curving of 

 the anal segments became complete. 6.30 p.m. : a string of fine 

 clusters observed in dorsal region, indicating position of dorsal vessel. 

 Intestine continues dark, and ends apparently rather abruptly, but a 

 delicate outline, as of the bowel, can be traced beyond, in the pos- 

 terior segments. 



Ninth day, 7 a.m. — Dorsal vessel become more decided. Serous 

 membrane distinct enough, and the outline of the amniotic sac still 

 to be traced. Eyes become darker and more contracted and crescentic. 

 Outlines of oral organs appearing. 9 a.m. : first pulsations in dorsal 

 vessel noticed at intervals of from 20 to 30 seconds. At noon, timed 

 again about the same. At 5 p.m. : a little more frequent ; counted 

 occasionally from 7 to 11 p.m., with a similar result. Posterior bowel 

 more plainly seen, also a sort of tube each side of the intestine, as it 

 were enclosing it. 



Tenth day, 7 a.m. — Counted pulsations at intervals of 15 seconds, 

 though still irregular, as sometimes they may be noted 10 seconds, or 

 even less apart, at other times there would be a rest of 20 seconds or 

 more. At 9 a.m. : counted five or six beats per minute. Serous 

 membrane plain enough as a fine marginal line ; another, but very 

 faint, line, still marked the amniotic sac as being entire, but difficult 

 to distinguish from dorsal margin of body. Balls of yolk-granules 

 collecting near mouth parts ; sesophagus just becoming visible in out- 

 line. 3 p.m. : circulation more regular, counted for several consecu- 

 tive minutes six beats per minute. Serous membrane easily traced, 

 but the line marking amniotic sac with difficulty. Soon after this, 

 thorax seemed detached from annulus, leaving an oblong mass of 

 granules on the annulus, where it had been attached. Simultaneously 

 wdth this, the first efforts at deglutition in oesophagus were noticed, 

 but nothing drawn down at present ; and, as more than twenty hours 

 elapsed before yolk-granules were taken in at the mouth, it is very 

 probable, as Dr. Chapman suggests, that nutriment is absorbed by 



