A New Species of Spirontocaris 137 



Fifth pereiopod much like the fourth also without epipodite. Pro- 

 podus with seven pairs of spines. Merus with one spine in four speci- 

 mens, and two in the other. Length 12 mm. 



First pleopod (female) with stout protopodite ; exopodite slender but 

 not blunt; endopodite two-thirds length of exopodite, stout, tapering 

 from distal third to a point. Length 3 mm. 



Remaining pleopods like those of S. fabricii. Lengths of pleopods 

 two to five are five, five, four and one-half, and three mm. 



Protopodite of uropod with one very blunt spine on the long outer 

 lobe; no inner lobe. Two latero-posterior spines on the exopodite, one 

 behind the other, the anterior being the smaller. 



Colour. — In general the body is banded by bright brownish red to 

 orange stripes which run dorso-ventrally. Those of the cephalothorax 

 and the three anterior abdominal segments run somewhat obliquely, the 

 ventral end being the more anterior. On the cephalothorax the areas 

 between these stripes have a bluish tinge ; on the rest of the body these 

 areas are whitish. The appendages have alternating bands of white 

 and orange; the bands on the coxa, basis and ischium of the pereiopods 

 are purplish. The edges of all the abdominal segments, except the 

 anterior edge of the second, the lateral edge of the antennal squame, the 

 anterior lateral edge of the first protopodite of the antenna, and the 

 edges of the lateral spine of the first protopodite of the antennule are 

 defined by a sharp red line. The flagellum of the antenna is all red. 

 Ventrally on the cephalothorax are two horizontal orange bands. 



Very similar to Spirontocaris washingtoniana Rathbun (Rathbun 1902, 

 page 895. Rathbun 19 10, page 76) and to S. profunda Rathbim 

 (Rathbun 1906, page 914). The rostrum is almost identical with 

 that of the latter, but differs from 5. profunda in having shorter third 

 maxillipedes, reaching only to the distal end of the squame of the antenna ; 

 in having a longer lateral spine (basal scale) on the first protopodite of 

 the antennule; and in having the second pereiopod with a seven jointed 

 carpus. It differs from S. washingtoniana in that the rostrum is shorter, 

 and with only one tooth on the ventral edge ; in having a longer lateral 

 spine on the first protopodite of the antennule; and in having shorter 

 third maxillipedes. 



Dimensions. — All were females and the lengths were 49, 41, 38, 37 

 and 32 millimetres. 



Distribution. — New Brunswick; one specimen from Passamaquoddy 

 bay (48 mm.) at 30 metres: one from Joe's point, St. Croix river (41 mm.) : 

 two from Head Harbour, Campobello island, the 37 mm. specimen from 

 ID metres of water and the 32 mm. one from kelp at low tide. Nova 

 Scotia; one from St. Mary's bay (38 mm.). 



