MusEUM AND Art NOTES 115

attain a length of 21.5 cm. from the tip of the rostrum to the tip of the telson. They
are usually fished in Southern British Columbia at 60 to 100 fathoms on a sandy or

muddy bottom.

It must be remembered that the above descriptions only apply to the shrimps of
commercial value in British Columbia. Many other shrimps of different genera and
several other species of Pandalus may be found on our coast, but are all too small or
rare to be worth fishing.

Of the commercial species it should be noted that while Pandalus danae is most
valuable in Southern British Columbia, it tends to disappear farther north and to be
replaced by Pandalus borealis and Pandalopsis dispar. Moreover the farther north
one goes and the colder the average water temperature becomes, the shallower is the
fishing. Hence in Prince Rupert harbour Pandalus borealis, Pandalus platyceros, and
Pandalopsis dispar are commonly caught at depths of 25-30 fathoms.

Finally it may be said that the family Pandalidae well repays study from a purely
scientific standpoint. The members of this family are unique in many points of
anatomy, development and life history, and it is hoped that various papers dealing
with these topics will be published by the writer within the next two or three years.

EVEERAT URE Clin)

1. Rathbun, Mary J. 1904. Decapod Crustaceans of the northwest coast of North
America. Harriman Alaska Expedition.

2. Rathbun, Richard. 1889. A review of the fisheries in the continguous waters
of Washington and British Columbia. Rep. U. S. Fish. Comm. 253-350.

3. Schmitt, Waldo, L. 1921. Marine decapod Crustacea of California Univ.
Gali ubl.2Z00l,. Xi.

DESCRIPTION OFS PEATES

Plate I. Lateral view of a Pandalid. (In part after Schmitt).

Plate II. The British Columbian Pandalids of Commerce. Measurements are
taken from tip of rostrum to tip of telson.

Fig. 1. Pandalus hypsinotus; lateral view; 13.5 cm. (536 inches).

. Pandalus danac, lateral view; 12.5 cm. (5 inches).

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3. Pandalus borealis; lateral view; 15 cm. (6 inches).
Fig. 4. Pandalus platyceros; lateral view; 22 cm. (85% inches).

Fig. 5. Pandalopsis dispar; lateral view; 18.5 cm. (7% inches).