GRAPSOIDEA. 3$g 



excepting 1 L, are coalescent or obsolete ; 1 L is marked by a single 

 small tubercle. The cardiac areolet is rather distinct and large. 

 These areolets are much subdivided. The intramedial is made up of 

 a posterior range hardly divided ; another just anterior made up of 

 four transverse tubercles; then a shorter transverse line sometimes 

 concealed; then two transverse tubercles; then a transverse line, 

 and then two more tubercles. In this species, the raised line adjoin- 

 ing the posterior margin of the carapax is broken up into a number of 

 unequal tubercles. 



Cancer squamosus, Herbst, i. 260, pi. 20, f. 113. 

 Grapsus squamosus, Latr., Hist. Nat. Crust., vi. 73. 



Plagusia squamosa, Lamk., Hist. An. sans Vert., v. 247; Latr.; Edwards, Crust., 

 ii. 44; De Haan, Faun. Japon., 31. 



Plagusia depressa (Herbst), Latr. 

 At sea, east of Straits of Sunda. 



Specimen a small one. Length of carapax, seven lines; breadth, 

 seven and a half lines. 



In the absence of the nagellum from the palpus of the outer maxil- 

 lipeds, this species is intermediate between Acantftopus of De Haan 

 [Plagusia clavimana and the allied), and the PI. squamosa, but this 

 intermediate relation does not extend to the main branch of the 

 outer maxillipeds or other distinctive characters, in which respects, it 

 is very near the squamosa and the other thick-bodied Plagusiae. 



Cancer depressus, Herbst, pi. 3, f. 55. 



Grapsus depressus, Latr., Crust., vi. 66. 



Plagusia depressa, Latr. Encyc, x. 147; Edwards, ii. 93. 



Plagusia speciosa. 



Squamosse affinis. Margo antero-lateralis Z-dentatus. 



Near the squamosa; but antero-lateral margin with only three teeth. 



93 



