CRUSTACEA. 



103 



the throat of a codfish, or from the skin of a common dogfish 

 (Squalus acanthus.) The swimmerets of these specimens were 

 thickly covered with a species of Vorticella, a circumstance that 

 is suggestive that they lived rather in the retired and quiet posi- 

 tion of the throat of the codfish, which their black colour also 

 supports, rather than on the external surface of a fast-swimming 

 dogfish. 



Genus, Monoctjlodes Stimpson. 



Marine invert. Grand Manan, p. 54. 



Oephalon produced and depressed anteriorly. Eyes coalesced 

 into one. First antennse without a secondary appendage. First 

 two pairs of feet subchelate, wrist antero-distally produced to 

 the extremity of the inferior margin of the hand. Telson entire. 



Monoculodes stimpsoni. — Spence Bate, Cat. Brit. Mas., p. 105, 

 pi. xvi,f. 3 — Bate and Westwood, p. 168. 

 Our first specimen was taken in the Channel off the coast of 

 Cornwall, but it only consisting of a mutilated portion, the 

 original description in the catalogue of the British Museum was 

 taken. We have since seen a specimen taken by the Rev. Mr. 

 Norman off the coast of Northumberland. 



GAMARLBUS. 



Genus, Dexamine. — Leach. 



JEdin. Encyclopedia, vii, p. 433. 



First pair of antennse having the third joint of the peduncle 

 reduced to resemble the first articulus of the flagellum. Without 

 a secondary appendage. Mandibles having no appendage, 

 Hands feeble, subchelate. Telson single, divided. 



Dexamine spinosa. — Montagu, Lin. Trans., vol. xi, t. ii, fig. I. 

 Bate and Westivood, vol. i, p. 237. 



All round our coasts where naturalists have searched. 



It is a prettily coloured species, brilliant red with dark crimson 

 spots. Those that are found nearer the shore are less bright but 

 darker hue, and obtain a stain of blue that lessens their 

 brilliancy. 



