40 DREDGING REPORTS. 



length, about once and a half as long as the last abdominal ring. 

 Colour brown. Length iVth of an inch. 



I. hcmata is pretty widely distributed, at any rate, on our 

 eastern shores ; where it occurs both in tidal pools and in the ' 

 open sea. It is, however, not very commonly taken between tide 

 marks ; neither in the open sea is it so abundant as many other 

 species. The following are the localities in which it has been 

 taken : — Shetland, Northumberland and Durham (both littoral 

 and pelagic), Channel Islands ; "Weymouth (Mr. Lubbock). 



2. IcHTHYOPHORBA DENTICORNIS, ClttUS. 



Claus; Die frei lebenden Copepoden, p. 199, T. XXXV, 

 figs. 1, 3-9. 



Superior antennae as long as the body, bearing a strong pointed 

 tooth on the upper border of the 1st, 2nd, and 5th joints. Right 

 antenna of the male much swollen in the middle, armed with a 

 strong spine on the joint next above the uppermost serrated plate, 

 and with three or four smaller teeth on the preceding joints. 

 Lower anterior angle of the cephalothorax produced into a strong 

 tooth. First segment of the female abdomen bearing on the right 

 side two long, slender spines connected with the papilla for the 

 attachment of spermatophores. Fifth pair of feet similar to those 

 of I. hamata, but the inner claw of the right foot possesses at its 

 extremity, a row of blunt serrations, and the outer branch of the 

 left foot is 3 -jointed. 



The genus Ichthyophorha was established by Lilljeborg in his 

 work (published in 1853), "De Crustaceis ex ordinibus tribus 

 Cladoceris, Ostracodis et Copepodis in Scania occurrentibus." 

 In this work one species only, I. hamata, was described. Dr. 

 Claus in his recent work on the Copepoda has described an addi- 

 tional species, I. denticorms, substituting at the same time for 

 Prof. Lilljeborg' s specific name hamata, that of angustata, under 

 the impression that the species referred to by Lilljeborg might 

 not be identical with the new " angustata.'''' There seems, how- 

 ever, little room to doubt that the species described by the two 

 authors are one and the same, and I have therefore here adopted 

 the older name. In our seas, I. hamata is much the commoner form. 



