60 



MR. L. A. BORRADAILE O?^ THE 



and third segments. In many Decapods,, as in Lecmdei^ (text- 

 tig. 46) the same fact is clear upon careful examination. I shall 

 call the processes in question the inner and outer lacinice. The 

 outwardly-directed lobe which is often present upon the first 

 segment has been regarded by various authors as the exopodite, 

 and the conclusion drawn that the part of the limb proximal to 

 the basipodite is lacking. It is hard to see upon what evidence 

 this view can be based. The exite is much moi^e easily inter- 

 preted as a pi^oepiiDodite. It is represented in Leand,er by a hump 

 upon the base of the first endite. 



Text-fieure 40. 



Text-fisfure 41. 



Text-figure 42. 



Text-fi<?ure 43. 



Text-fig. 40. End view of left mandible of Condiodt/tes tridacnce. 



„ 41. End view of left molar process of Fericlimenes spiniferus. 

 „ 42. Oblique view of end of right molar process of tlie same species. 

 „ 43. Same view of right molar process of Saron marmoratus. 



The two cleft lobes usually known as the " lacinise " of the 

 maxilla (text-figs. 14-17) are each equivalent not, as has some- 

 times been supposed, to one of the elementary segments of the 

 limb, but to two, and thus they together represent the first four 

 endites of the primitive limb. This interpretation is strongly 

 suggested by such appendages as the maxillfe of larval Penasides 

 (text-fig. 16) and especially by that of Cerataspis (text-fig. 15), 

 and is not contradicted by the fact that articulations are often 



