210 B GEOLOGICAL SURVEY OF CANADA. 



Pugettia gracilis Dana. 



Queen Charlotte Islands, shore ; and shallow dredging, Port Simpson 

 to north end of Vancouver Island. 



Scyra acutifrons Dana. 



Two males from near Victoria, Vancouver Island. Another male 

 specimen agreeing well with these was collected at the same locality 

 by Mr. E. Middleton in 1875, and is referred to by Mr. Whiteaves, on 

 my authority, as " Scyra, sp. undt." (Canadian Naturalist, Vol. viii.,. 

 No. 8, 18*78.) All these specimens are much larger than the ones 

 described by Dana, and differ much from his description and figures.. 

 The specimen collected by Mr. Middleton differed so much that I at 

 first supposed it must represent a new species, but the specimens col- 

 lected by Dr. Dawson show a nearer approach to Dana's figures, and I 

 now think there is little doubt that Dana's description and figures were- 

 based on females and young males, and that the specimens before me- 

 are the fully adult males of the same species. 



In the specimens before me, the lamelliform rostrum is very much ex- 

 panded laterally, so that it is as wide, or even considerably wider than,, 

 the width of the front between the praBocular spines, and the lobes are 

 much less divergent anteriorly than shown in Dana's figure. The- 

 protuberance upon each branchial region is elongated and excessively 

 developed, and posteriorly it projects so much as to overhang the 

 lateral margin of the carapax. The anterior cardiac protuberance 

 is tubercular and obtuse and fully as high as the branchial protuber- 

 ances, but separated from them and from the large gastric protuber- 

 ance by a broad and deep depression ; the posterior cardiac protuberance 

 is small, but conical and conspicuous. The whole gastric region is 

 protuberant, and sejmrated from the branchial region, on each side, by 

 a deep and narrow cervical groove. The posterior gastric elevation is 

 large and obtusely tubercular, while the anterior is small and conical. 

 The chelipeds are proportionably much larger every way than in Dana's 

 specimens, and the lamelliform crest on the propodus is much broader.. 

 The differences in the chelipeds, and partially also those in the cara- 

 pax, are shown by the following measurements of the specimens 

 collected by Dr. Dawson : — 



" Cenobites" Diogenes. Clibanarius lineatus (Milne-Edwards) is also given, but there is now 

 plain evidence of a mistake in the identification, for Miers (Proceedings Zoological Society, 

 London, 1877, p. 658, pi. 66. fig. 4) has described and figured a species, as Clibanarius Lordi, said 

 to have been collected at the same locality as Bate's G. lineatus, and presented to the British. 

 Museum by Mr. Lord, and Miers states that the specimen was labelled Clibanarius lineatus .but 

 that it is certainly not the species described under that name by Milne-Edwards and figured by 

 Dana. 



