268 Dr. W. C. M'lntosh on the 



CaUiojnus bidentatus (n. sp.), Norman, Nat. Hist. Trans. 

 Northumb. & Durham, vol. i. 1865, p. 24. 



This species is frequently dredged off the Harbour and the 

 East Rocks, as well as in the deeper water outside the bay, 

 and found on the West Sands after storms. Mr. Norman 

 states that it is not uncommon all along the east coast. 



The body is about two fifths of an inch long, of a pale 

 straw-colour, tinted with brownish at the joints and the bases 

 of the limbs. Superior antennae twice as long as the in- 

 ferior, beautifully banded with red. Eyes irregularly rounded, 

 brownish red or pale brick-red. The first and second gnatho- 

 pods are nearly equal (the second, however, being larger) and 

 similar in striicture. Hand almond-shaped, the palm being 

 furnished with a series of very distinct stout spines, and a row 

 of smaller spines reaching the base of the finger ; the latter 

 is long, boldly curved, and regularly divided on the concave 

 side. The first and second pleopods have spines, that of the 

 former, however, being sometimes indistinct. A very cha- 

 racteristic convexity occurs at the junction of the third and 

 fourth pleopods ; and the dorsal margin of the latter is concave. 



Genus Leucothoe, Leach. 



Levcothoe spinicarpa^ Abildgaard ; B. & W. (yp. cit. i. p. 271 

 (as L. articulosa). 

 Occasionally in pools at the East Eocks, and on the West 

 Sands after storms. 



Genus Aora, Kroyer. 

 Aora gracilis, Bate ; B. & W. op. cit. i. p. 281. 

 Not uncommon in the debris of the fishing-boats. One had 

 a spike beneath the second pair of gnathopoda. 



Genus Microdeuteropus, Costa. 

 Microdeuteropm Websteri, Bate ; B. & W. op. cit. i. p. 291. 

 In the stomach of a haddock, and in debris of the fishing- 

 boats. Body of a straw-colour, the antennae having lighter 

 and darker bands of the same hue ; eyes round, black. 



Genus Bathyporeia, Lindstrom. 

 Bathyporeia pilosa, Lindstrom ; B. & W. op. cit. i. p. 304. 

 Common off the East Rocks in the laminarian region. 



