1909. | OF THE LIMPET PATELLA VULGATA. 24] 
THirD YEAR-Grovur (1905 brood). 
1907/1908) | | leg rot 
| Dec. Jan. Feb. Mar. Apr. May June July Sep. Oct. Oct. Nov. Dec. | 
| BL | 2 | 8: |iae | 1a.) 28. | 27. | 30. | 2. | 1. / 81. | so. | 31. 
SE) (ase acelge Snel eae | al 
66 i) B67. SSP eevee oe | 438 4d 45 | 
67 al Seay enemlara0 Pie aaa ihe 
68... 367 .. 369)... [372879 389 389 38998959 40 |40. 
69...) 380| .. |. |39 |a96|40 | 41 | | 
l7o..| . | a7 |.. larslars| ra dao a 
ies a SINE Sil) Cl Ae le ae aa ae aaa 
ell a [ocala ce ee Pass | 
ral) ee 7) all ea a Ra 4a 43°5 43°9 43-9] 43-9 
| | | 
FourtH YEAR-Group (1904 brood). 
|1907|  j1g08! | e donne 
Sept. Dec.| Jan. Feb. Mar. Apr. May! June) July | Sep.| Oct.| Oct. Nov.) Dee. 
fle 1) Sil | lik) Gy | ily PEER Al MA Os | 25 ile |) Sik | BOs NS, 
=a A a RR hos 
74...) 435 468 46'8 47-1 47-4 | a 
75.) = |43 |. [aol aa [aa 1) pe a es aay 
76 “43°6 46 46 |46 | 46 | 47 | 6479 48 48 481 481 
77 ...| 457 |46 |. |48 | 46 | Che tae oan ae 
| FB cos | i545) | 455) | | 
iva .../465/..| .. |a7 lar |are larva al 
| 80. & Heh a 47-4 ATS ATS 47-5) 47-9) 
| 81 Baal: ae  49°2 492) 493 493 
| 
Firrg or Sixra Year-Grovup (1903 or 1902 brood), 
| 82 | 50 | 50 |50 | 50 | | 
50 S05. |50°5| 51 514] 52) 52-2 | 52'5| 525 58 535 535 
c | 
first Year-Group.—It is a curious fact that one rarely finds 
on the shore limpets less than say 7 mm.long. I have found them of 
