DISTRIBUTION OF THE CLYDE CRANGONIDAE. 67 



be neatly distinguished from among the commoner species by the 

 presence of a narrow bi'ownish-black band across the tail fan, and 

 by the larger and less densely packed spots with which the 

 carapace and pleon are dotted. In each haul there would be 

 approximately one specimen of P. trispinosus to ten specimens of 

 C. vulgaris* 



Dr. Scott records this species from the Firth of Forth, 

 Aberdeen Bay, and the Moray Firth, and it has been recorded 

 by Di\ Norman, F.R.S., from Shetland. Apparently it has not 

 hitherto been recorded from any place on the West of Scotland. 



Philocheras bispinosus (Westwood). — This is comparatively a 

 small species, the largest specimens we captured (some females 

 with ova), not exceeding 18 mm. in length. The carapace is 

 furnished with two small spines on the median line, one being 

 situated behind the base of the small and narrow rostrum, and 

 the other, which is generally not so prominent, a sliort distance 

 behind the first. The carapace is also furnished with many small 

 tubercles, some of which are arranged so as to give the appearance 

 of small irregular ridges, more or less parallel to the median line. 



The majority of my specimens were of a pale greenish colour, 

 dotted with small light-brown spots, while the sides of the 

 pleura and carapace were marked with brown. Some specimens, 

 however, taken from off Aoidh Rock, Upper Loch Fyne, exhibited 

 a uniform reddish tint.f 



*NoTE. — While carrj-iiig on investigations during the summer of 1907, 

 I found this species to be moderatelj' common off Hailie Shore, near Largs, 

 in about 2 to 6 fathoms, and on a sandy bottom. I also dredged a few 

 specimens off the north end of Great Cumbrae, on the same kind of ground. 



t Note. — During this summer, 1906, I captured one or two specimens of 

 Philocheras in Garrison Bay, Millport (2-3 fms.), which agreed in all 

 respects with this species, save for the exceptional coloration. The 

 carapace was uniformlj' coloured a very dark brown, while the fourth 

 segment of the pleon and the tail-fan were each provided wth a transverse, 

 although much lighter, dark-brown band. Mr. S. W. Kemp, of the Irish 

 Fisheries Board, to whom 1 showed it, had no hesitation in referring it to 

 P. hispinosiis, although he had never met with that type of coloration 

 before in this species. It might be interesting Jo add that quite a number 

 of small specimens of Hippolyte varians, Leach, from the same locality, 

 and measuring 10-12 mm. in length, exhibited exactly the type of 

 coloration that I found in P. bisfiinosus. 



