

LEPTOSTRACA, SCHTZOPODA AND STOMATOPODA. 185 



Gonerichthus y. -Plate III., figs. 46 to 47. 



Localities : 



Off Kalpentyn Island, surface tow-nets all night. Twelve specimens, from 4 to 7 

 millims. in length from the eye to the telson. 



Cheval Paar, surface tow-net. Three specimens, 5 to 6 millims. long. 



This Gon&richthus is very closely allied indeed to the last, and the description 

 there given will answer for this species, save in the following particulars : 



Rostrum (figs. 46 and 47) comparatively much shorter, the length from the antero- 

 lateral spine to its tip being much shorter than the length from the antero-laterals to 

 the postero-median dorsal spine ; only three or four teeth on its ventral edge. 



Antero -lateral spines of the carapace, though still small, are more developed than 

 in type ft. 



Poster o-lateral spines relatively much shorter, and only extend about half way 

 down the second abdominal segment. 



Telson, while agreeing in general shape and armature, is comparatively a little 

 broader. 



The above comparison between the types ft and y is drawn up from specimens of 

 the same size, 7 millims., and at the same stage of development. Figs. 46 and 47 

 show the carapace of the type y in dorsal and lateral view respectively, and the 

 differences between types ft and y are readily seen in comparison with figs. 44 and 45, 

 in which the carapace of type ft is shown. Type ft at 4 millims. has a carapace of 

 about the same proportions as type y at 7 millims. (see fig. 43). It seems clear from 

 this that the larvse ft and y are distinct and belong to separate though closely allied 

 adults. 



"2 B 



