HIGHER CRUSTACEA OF THE FIRTH OF CLYDE. 345 



Off C umbrae (Robertson). We obtained a few 

 specimens in Loch Goil and Loch Long, 20-35 fathoms,, 

 mud. 



HIPPOLYTE SECURIFRONS. 



Hippolyte securifrons, Norman, Trans. Tyneside Nat. Field 

 Club, 1863, vol. iv., p. 267, pi. xii., figs. 1-7. 



Hippolyte Lilljeborgi, Dan. og Boeck., Beskrivelse of nogle 

 Norske Crust. Decap. 1872, p. 8. 



Abundant and fine in 25-100 fathoms, usually on 

 soft ground, as far up as Loch Long. A single 

 female with ova in March. Phryxus ahdoininalis 

 frequently occurs on the abdomen. 



This species when alive is of a beautiful red 

 colour. It is closely allied to H. spimis (Sowerby), 

 but in the latter the rostrum commences almost at 

 the posterior border of the carapace, and its teeth 

 are minutely serrated, the prolongation of the third 

 abdominal segment is more acute, and the spiny 

 armature of the telson is different. We have never 

 taken H. splnus in the Clyde. The rostral formula 

 of H. securifrons is i^^iii^'i. 



*' 3-4 rarely 5 



Genus Virbius, Stimpson. 



Virbius, Stimpson, Proc. Acad. Nat. Sc. Phil., 1860, p. 104. 



VIRBIUS VARIANS. 



Hippolyte varians. Leach, Edin. Ency. viii., p. 432.— Bell, 

 Brit. Crust, p. 286. 



Hippolyte sniaragdina, Kroyer, Monogr. Fremstilling af 

 Hippol. Nord. Arter., p. 63. 



Virbius smaragdinus, Stimpson, Proc. Acad. Nat. Sc. Phil., 

 1860, p. 104. 



Virbius varians, Heller, Crust, des Siidl. Eur. p. 288, taf. x., 

 fig. 4. 



Common in rock pools at low-water, and in the 

 laminarian zone, especially towards the mouth of 

 the Firth. 



VIRBIUS PRODUCTUS. 



Hippolyte producta, Norman, Ann. Mag. Nat. Hist. ser. 3, 

 vol. viii., 1861, p. 275, pi. xiii., fig. 5. 



Lamlash Bay, a single specimen (Norman). 



