1912.] Miscellanea. 89 
and in these the peduncle had only just begun to develop, while 
in the oldest specimen, which had reached the II p.c. stage, no 
sign of protrusion was seen. In February only a single specimen 
was obtained but this one was remarkable in that it had already 
reached the commencement of the 14 p.c. stage and the peduncle 
was still only a small rudiment. In this connection it is interest- 
ing to note that as regards the length of peduncle formed, the 
present specimens agree closely with the description given by 
Brooks of the larvae obtained by him in America and contrast 
markedly with Yatsu’s specimens from Japan. 
Although, so far as I know, no specimens of Brachiopoda have 
been obtained in the region of Hinzé Basin, several examples of 
Lingula anatina have been found at other parts of the Burma 
coast and it would seem probable that my larvae are those of 
this species. 
If this be the case, there can, I think, be no doubt ‘that the 
short peduncle in VYatsu’s specimens is a result of confinement in 
unnatural surroundings and is not a natural condition. 
2. The stage at which the change of shape of the shell takes 
place.—Both the above-mentioned accounts agree in stating that 
the change of shape of the shell from transversely oval to longitu- 
dinally oval takes place at the 6-7 p.c. stage, and Yatsu gives 
the following measurements of his specimens in support of this 
statement :— 
Length. Breadth. 
5+ prc: stage a | 313 # 386 # 
6 p.c. stage was AIT p 444 pp 
7-8 p.c. stage scalp ielaloein 615 pu 
| 
TT 
In the table below I have given the measurements of my 
specimens :— 
Month i | | 
nth in which Length. |Breadth. Pomengace Stage of development. 
: | | Bier e cy, 
| 
I December 50 625u 683" WE Ue yy Q p.c. stage. 
2 a6 a 629. 666m Tsk QO Rermat ne 
3 3) te 683" 633m I: 2°41 ) eo ”? ”? 
+ % ae 750u 725. I: 2990 | Commencing Iop.c. stage. 
5 %9 ae 850u 789M I: 3°00 | 10 p.c, stage. 
6 ap fs 875" 808u I: 2°92 cece ge a 
7 36 50 8538h 808h ne SOs Commencing II p.c stage. 
8 ” . 892 7754 I: 2°97 | ie aacpaee 
9 2 a: goo 833u 1) 2-09 II p.c. stage. 
10 » Se 908u 800u Te Zeo7 ee ae oF 
It oe g16u 808yu 12) 3-14 Sener 
12 February #3 III4u IIlI4u 1B) See Commencing 14 p.c. stage. 
a aaa Ses 
