1998-1902. No. 20.] 
BRACHIOPODS AND MOLLUSCS. 
© 
Aug. 30. 1901. Gaasefjord, 8 m. Small stones and clay with fucaceae. 
July 11. 1902. St. Helena, 4-14 m. Large and small stones over grown with 
fucaceae. 
July 15. , Off Havhestfjeld, North Devon. 
July 19% Off the camping ground, North Devon, 6—14 m. Small stones and 
algae. 
At no locality was modiolaria laevigata abundant. At most places 
the variety substriata Gray (m. laevis Beck) was met with together 
with the typical form, though the latter was more common than the 
variety. I append a few measurements of both forma typica and of 
substriata, showing how the species varies in regard to form. 
Forma typica: 
Rice Strait Long. 84 mm. Lat. 20 mm. Crass 14 mm. 
—_— 96.5 ,, AT 3, 12° 4 
_— 96.5, Te og, 11.5, 
Gaasefjord 31 7 19 2. 14. 7 
— 29 a. 74 12.5: 
_ 9 18, 1 
—_ 97 ; 18, 13) os 
Forma substriata: 
Gaasefjord 33g, 91.) 14~—«CO&««, 
— 99, 19 4 is 4 
— 20 —C«,, 13) 10, 
Havnefjord 19° 5 12° 5, 9 « 
Modiolaria nigra, Gray. 
Locality: 
Aug. 18. 1898. Bay near Rice Strait. 
Aug. 26. y _ — : 
Sept. 20. 1900. The head of the Gaasefjord, 6—40 m. Clay with small stones. 
Aug. 2 1901. — — _ , about 40 m. 
Aug. 16, — _ _ 
The species seems to be very scarce, since there are not more than 
one or two specimens from any locality. 
Rice Strait Long. 35 mm. Lat. 18 mm. — Crass. 11.5 mm. 
= WC, 16, 10, 
= 19, 1 ug 71 x 
Gaasefjord 45, Qh, 15 4 
= 435, 3  , 12 =~, 
= 38.5, 20.5 » ae 
In specimens from Rice Strait the epidermis is either olive-brown 
or dark-brown, in specimens from Gaasefjord it is olive-brown or black. 
