of the Fishery Board for Scotland 253 



somewhat widely apart. The ovisacs are very large, and the point at 

 which they are attached to each side of the genital segment is nearer 

 their posterior than their anterior ends ; they thus occupy a rather 

 peculiar position in relation to the body of the Copepod ; the ovisacs 

 are of an elongate-oval form, and from the peculiar manner in which 

 they are attached to the genital segment, they extend forward along each 

 side of the body of the Copepod instead of backwards, as in the 

 majority of Copepods which carry two ovisacs. It was the peculiar 

 position of the ovisacs that attracted my attention to this specimen, 

 (fig. 12). 



The anteniaules are short and six-jointed, the second joint is consider- 

 ably longer than any of the others ; the formula ahows the proportional 

 lengths of all the joints : — 



Numbers of the joints, 1.2.3.4.5.6 



Proportional lengths of the joints 14 . 24 . 17 , 12 . 13 . 10 



The joints are sparingly setiferous, and taper very gradually from the 

 proximal to the distal end (fig. 14). 



The antennae are very small, they each consist of a single two-jointed 

 branch, armed with about six terminal setae ; the three middle setae are 

 moderately elongated, but the others are short ; the joints of the 

 antennae are sub-equal and nearly three times longer than broad (fig. 15). 



The mandibles have a remarkable resemblance to those of the 

 Lernaeopodidae ; they are moderately elongated, narrow, and somewhat 

 cylindrical ; they taper slightly from about the middle of the distal 

 extremity, the inner margin is denticulate from about the middle to the 

 apex of the mandible (fig. 16). 



The maxillae are very rudimentary ; they are somewhat papilliform, 

 and furnished with about four moderately stout spines (fig. 17). 



The first maxillipedes are moderately stout, but of a somewhat 

 rudimentary structure ; they appear to be each composed of two joints, 

 the first is comparatively turnid, the second is smaller and terminates 

 in a boldly rounded apex finely serrated on the margin (fig. 18). 



The second maxillipedes are large and strong ; they are each com- 

 posed of two joints, the basal joint is considerably larger than the other, 

 the second is armed with a short but stout claw, the margin of which 

 is convex and fits into a corresponding hollow in the joint to which it is 

 articulated (fig. 19). 



Thoracic feet. — There appear to be only two pairs of thoracic feet, 

 which are similar to each other in size and structure. They appear to be 

 each composed of a single two-jointed branch of moderate length, 

 furnished with two somewhat elongated and two or three very small 

 setae (fig. 20). The position of the thoracic feet is somewhat abnormal ; 

 one pair is almost in line with, and outside of the second maxillipedes, 

 the other pair occupy a somewhat intermediate position and somewhat 

 further forward, as shown in figure 13. 



Habitat. — Dredged at Tarbert Bank, Lower Loch Fyne, in 17 to 20 

 fathoms, October 28th, 1899. One specimen only— a female — was 

 observed. 



Remarks. — This somewhat curious Copepod, which I have now tried 

 to describe, is in some respects not very unlike Cancerilla tubulata, 

 Dalyell. It has a somewhat similar squat form, large ovisacs, and short 

 six-jointed antennules ; while, as regards the form of the mandibles and 

 maxillae, and especially of the latter, the disparity is not very great ; it is 

 only in the structure of the antennae, the maxillipedes, and the thoracic 

 feet that the most marked differences are observed. The antennae are 



