APPENDIX II 449 



P. pubescens, and about four times as long as wide, while in P. 

 krfyeri it is obliquely triangular, between two and three times as 

 long as wide. The eyes of P. pubescens are longer than those of 

 P. krffyeri, so that the slender scale at the base of the outer antennae 

 does not reach the end of the eye in the former but does in the 

 latter. By far the easiest way to distinguish these two forms is 

 by the colour pattern; in P. pubescens the bands of red on the 

 walking feet are disposed across the middle of each segment, while 

 in P. krtfyeri they run across the articulations between the segments. 



The common lobster of New England extends to southern 

 Labrador and occurs in abundance on the coasts of the Gulf of St. 

 Lawrence. It has been found as far north as Henley Harbour 

 (52 north lat.), and extends perhaps a few miles farther. Its 

 absence along the Atlantic coast of Labrador is explained by the 

 lower temperature produced by the Arctic current, which flows 

 southward close to the shore. While many lobsters are trapped 

 in the shallow bays of the southern coast, the catch is not sufficient 

 to supply a cannery. The lobsters appear to be all fished out 

 when the traps are first set, and various attempts to operate can- 

 neries have had to be abandoned. 1 



There are fourteen species of shrimps known on the Labrador 

 coast, varying in length from a half inch to four or five inches. 

 They agree in having the abdomen or posterior part of large size, 

 and generally extended to the full length, though sometimes bent 

 at a right angle instead of being folded up under the thorax, as in 

 the crabs. The shrimps are further marked by a spreading tail 

 fan composed of the terminal segment, or tail, and the two pairs 

 of appendages attached to the preceding segment. In one of 

 the most abundant species (Sclerocrangon boreas] , of a pale brownish 

 red colour with a chestnut stripe along the sides, the skin is hard 

 and rough, the body is stout in front, tapering posteriorly, the tiny 

 claws which arm the first pair of trunk legs are of curious shape 

 peculiar to the family Cragonidse, the palmar portion being oblong 

 and bearing a small spine in place of the well-known thumb or 

 immovable finger of the lobster and most shrimps, while a slender 

 movable finger lies transversely or across the end of the palm. 



One of the largest shrimps is Pandalus montagui, which is abun- 

 dant especially in weeds on a clear, pebbly bottom ; it is compressed 

 laterally and armed with a long, slender, swordlike rostrum or beak, 

 with a row of sharp spines on its middle line; the antennae may 

 be as long as the rest of the animal, and the legs are all slender 

 without conspicuous claws. The red colour which plays a promi- 



1 Cf. Herrick, The American Lobster, in Bull. U. S. Fish Comm. 

 for 1895, pp. 14-15. 

 2o 



