A New Species of Spirontocaris 



139 



Spirontocaris gaimardii (Milne-Edwards). 



Variations. — 'Eight specimens were examined and the following varia- 

 tions in the number of spines found. 



No, spines 



Dorsal carapace 



Dorsal rostrum 



Ventral rostrum 



Lateral telson (2 broken) 



Dimensions. — The females varied in length from 56 to 17 mm., and 

 the males from 39 to 15 mm. 



Distribution. — Newfoundland; Port au Port, C.G.S. "33" Sta. 65. 

 Nova Scotia; Brier island. 



Spirontocaris polaris (Sabine). PI. V, fig. 12. 



Colour. — Scattered orange red areas over the cephalothorax and 

 abdomen, the colour being due to closely placed minute dots. The major 

 portion of the colouration is on the dorsal surface. Postero-ventrally to 

 the posterior dorsal carapace spine the colour is due to much larger spots. 

 Ventral to these larger spots are several small areas of small dots which 

 have a sulphur yellow tinge. Rostrum with scattered orange spots and 

 its ventral edge bright red. Antennules, antennae, third maxillipedes, 

 and first and second pereiopods with a few scattered spots. Pereiopod^- 

 three to five with orange band on coxa and basis, two bands on merus, 

 and two on propodus. Protopodite of pleopods two to five with two to 

 three spots, the posiero-distal one of which is the largest, and which in 

 pleopods three to five is of a very dark orange colour. The posterior 

 borde'- of the fifth and sixth abdominal segments is defined by a bright 

 red line. 



Variations. — There is considerable variation in the numbers of spines 

 on the various parts as is shown in the following table. The figures 

 indicate numbers of individuals. 



No. spines i 2 3 4 S 6 7 8 q 10 



Dorsal carapace 



Dorsal rostrum 



Ventral rostrum 



Lateral telson 



Merus third pereiopod 



Merus fourth pereiopod .... 

 Merus fifth pereiopod 



