79 



the form of a l)hint tooth ; the other is divided into several (six?) 

 finger-like curved processes, which are ciliated on the edges." 

 In the caudal laminae the stout ungues are seven in number in 

 the female specimen, but in the male they seem to be certainly 

 less numerous, though here, unfortunately^ we have to judge no!t 

 from the spines themselves, but from the scars of their places of 

 insertion. The differences mentioned have led me to give the 

 Irish specimen a distinctive name. Crossophorus hnpcriaUs- 



In discussing the large lamina in the maxillipeds of Cypridina, 

 G. W. Miiller sue2fe«;ts that it represents the coale-ceticeof two 

 joints, and t(^ tjiis view the apical lobe of the lamina in Crosso- 

 phorus lends probability- 



Cross(3imtorus AFRiCAxrs, Stcbbing. 

 Plates 15A and 16. 



I90I. CrosupJiunis nfricanuSy Stabbing, Knowledge, vol. 24, p. 

 100. 



Shell smooth, not very hard, surface diversified by oily-looking 

 little circles; antcnnal notch not widely opened, reaching ito the 

 miuale of the valve, the subacute rostral process fineily ciliated on 

 its lower margin. 



Of eyes, median ocellus, or frontal tentacle, I have not found 

 any trace^ nor is mention of them made under this genus by 

 Brady or by ]>rady and Norman- The first antennse have the first 

 joint long and broad, the second narrower and not quite so long, 

 but longer than all the remaining joints together, more than 

 twice as long as the third, which is obliquely articulated with the 

 much shorter fourth ; the fifth has an annulated sensory seta, 

 carrying on one side a double series of branchlets, followed after 

 a considerable interval by some very small ones at the distal end ; 

 on the two little terminal joints there are seven^ mostly very un- 

 equal, setae, three of them very long. Ih-ady and Norman in- 

 clude in their character of the genus antennules with second 

 joint only slightly longer than the third, but their figure shows 

 it considerably longer than the third and fourth joints combined- 



Ihe second antennae have the swimming branch divided 

 between the long apically widened first joint and the eight follow- 

 ing joints, of which the first is considerably the longest, the first 

 seven each armed with one plumose seta attended by a short 

 spine, the terminal having seven such sdtse; the secondary 

 appendage in the female is straight, its middle joint the longest, 

 the third tapering-. 



The mandibles haAO the strongly hirsute and sharply two- 

 pointed masticator}' process projecting from distal part of first 

 joint, with several spines adjoining on base of second, from inner 

 margin of which issue*; a long plumose seta, the outer margin 



