144 



Transactions of the Royal Canadian Institute 



Variations. — There are the following variations in the number of 

 spines : 



No. spines 



Dorsal carapace 



Dorsal rostrum 



Ventral rostrum 



Lateral telson 



Merus third pereiopod . . 

 Merus fourth pereiopod 

 Merus fifth pereiopod. . 



Dimensions. — Ths females varied in length from 28 to 11 mm., and the 

 males from 18 to 12 mm. 



'>'■' Distribution. — New Brunswick; St. Andrews: Head Harbour, Campo- 

 bello island. Maine; Eastport. 



References. 



Rathbun, M.J. 



1902. Description of New Decapod Crustaceans from the West Coast 

 of North America. Proc. U.S. Nat. Museum. Vol. 24. pp. 885- 



905- 

 1906. The Brachyura and Macrura of the Hawaiian Islands. Bull, of 

 • the U.S. Fish Commission. Vol. xxiii. Part iii. 1903. pp. 827- 



930. 

 19 10. Decapod Crustaceans of the Northwest Coast of North 



America. Harriman Alaska Expedition. Vol. x. Crustacea. 



pp. 3-210. 



List of Figures. 



Plate II. 



1. Spirontocaris zebra. Lateral view of a female specimen 37 mm. 



long, showing the colour pattern. 



2. Spirontocaris zebra. Telson, dorsal view. Length 6 mm. 



3. Spirontocaris zebra. Left third pereiopod. Lateral view. Length 



15 mm. 



4. Spirontocaris zebra. Telson and left uropod. Lateral view. 



Length 6 mm. 



