238 
Scalpellum gvuvelianum Pilsbry. 
Departure Bay, Nanaimo, 20 fathoms. 8/VI 15. Several specimens. 
Strait of Georgia, about 40 fathoms; mud and sponges. 16/VI 15. Several 
specimens. 
Strait of Georgia, about 50 fathoms; mud and stones. 7/VII 15. Two 
small specimens. 
Whereas the latter specimens hold an intermediate position be- 
tween the typical form and the subspecies secundum Pilsbry 
(1907), the other specimens decidedly belong to the latter sub- 
Fig. 7. Scalpellum gruvelianum, f. secundum. Strait of Georgia. 40 fathoms. a. adult 
specimen ; b. and c. young specimens ; d. mandible, e. maxilla, f. caudal appendages 
of the adult. [a X 4, b X 22, c x 33, d—f X 44], 
species, although their inframedian latus seems to be a little more 
prominent with a somewhat broader upper margin. The larger of 
the specimens attain an entire length of about 1 cm with capitulums 
between 6 and 7 mm. 
Pilsbry (1907) does not give any details about the body of 
the animal, although some of the details are rather characteristic. 
The mouth feet are only scantily furnished with hairs. The 
mandible (Fig. 7) has three strong, and rather pointed teeth; the 
excavation between the first and the second tooth occupies more 
than half the cutting edge. The lower (third) tooth has three dent- 
icles on its upper edge. The inferior angle is rather square cut, 
and densely pectinate, but almost destitute of finer hairs. 
The maxilla has an almost straight cutting edge set with 
spines all over; only the first two spines are a little more prominent; 
