36 G-. O. Sårs. 



somewhat irregularly rounded, the greatest height not nearly 

 attaining the length, and occurring in front of the middle, 

 dorsal margin boldly curved anteriorly, almost straight and 

 obliquely declining behind, ventral margin evenly curved and 

 passing into the anterior and posterior edge without any inter- 

 vening angle, anterior extremity broader than the posterior; 

 seen from above or beneath, regularly rounded oval, with tlie 

 greatest width about in the middle. Surface of shell smooth, 

 without any lines of growth. Head large, with the rostral 

 expansion in female very broad and, when seen laterally, termina- 

 ting in a blunt point, seen in front, obtusely rounded at the 

 extremity, without any lateral projections; that in male trans- 

 versely truncated, lateral corners scarcely produced. Branchial 

 legs in female 12 pairs, in male 10 pairs. First pair of legs 

 in male prehensile, palmar denticles obtuse and densely 

 crowded, subapical lobe very large and densely setous. Colour 

 in alcoholic specimens pale corneous. Length of adult female 

 7 mm., of male about the same. 



Remarks. The above-characterised species is, I believe, 

 that recorded by King as L. macleayana. In the form of the 

 shell it looks very like the European species L. hrachyura, 

 but is easily distinguishable by the rather different form of 

 the rostrum in the two sexes. 



Description of the female. 



(PL 6.) 



The length of the shell in fully grown specimens measur.es 

 about 7 mm., and accordingly, this species grows to a some- 

 what larger size than the European form L. hrachyura, which 

 hardly exceeds a length of 5 mm. 



The shell is very tumid, subglobose, and does not exhibit 

 any distinctly defined umbones. 



Seen from the side (fig. 1), it is of a somewhat irregular 

 rounded form, with the greatest height not nearly attaining 



