ON THE BRACHYUROUS DECAPODS OF THE CAPE. 



67 



the Cancer minutus of Fabricius, of which I have taken abundance in the Atlantic ocean, 

 adhering to the gulf-weed, is only three lines long. 



Sp. 28. ( ) Nautilograpsus Smithii, n. s. 



Descr. Nautilograpsus testa convexa Itevi, tarn lata quam long^, margine lateral! antico pone 

 oculos vix emarginato, clypeo lato vix ultra laterum angulos porrecto. 



Note. This species is seven lines long, and as broad as long. I beheve that many species 

 of this sub-genus are confounded with the Cancer minutus of Fabricius. Nautilograpsus is 

 an excellent groupe, which appears to have escaped the notice of M. Dehaan. It is in general 

 found in the wide ocean, adhering to chelonian reptiles or masses of floating sea-weed. The 

 feet therefore are almost natatorial, Grapsus pusillus of Dehaan appears to be a species of 

 the sub-genus near to Nautilograpsus major above described. 



Suh-genus. Grapsillus, M'L. 



Cephalothorax heart-shaped, depressed, with the back plane and the sides arched, almost form- 

 ing the quadrant of a circle ; the clypeus is broad, truncated, and sinuated in front. 

 Orbits placed at the fore angles of the shell, with great depressed eyes. 

 Exterior Antennce placed without the orbit towards the middle of the clypeus. 

 Internal Antennce rather thick. 



External Pedipalpi with the second and third joints quadrate, almost equal, the third being a 

 little shorter; the third joint also has its inner apex rounded off, the tigellus is thick, and 

 the outer palpus has its sides almost parallel. 



Feet; first pair almost twice as long as body with very large joints; the chelse being without 

 teeth and the other feet being short with hairy tarsi. 



Abdomen in males has five segments, in females it has six. 



11. This groupe is very distinct from any described one with which I am acquainted. It 



approaches in many respects to Nautilograpsus, and appears to connect that groupe with 



Plagusia. It is remarkable for the large size of the fore feet. 



Sp. 29. ( ) Grapsillus subinteger, n. s. 



Descr. Grapsillus testaceus ; thoracis lateribus versus medium vix emarginatis ; clypeo medio 

 emarginato denteque utrinque ad oculos obtuso ; manibus articulo secundo intus tridentato, 

 chelis apice purpureis ad marginem unistriatis. 



Note. This species is about four lines long, and rather broader than long. 



Sp. 30. ( ) Grapsillus dentatus, n. s. /-^rJZv'' 



Descr. Grapsillus rufo-testaceus ; thoracis lateribus medio unidentatis, dente acuto ; clypeo medio 

 sub-bilobo denteque distincto utrinque ad oculos obtuso ; manibus articulo secundo intus 

 septem-dentato, chelis apice sub-purpureis ad marginem unistriatis. 



Note. This species is about half an inch long, and about the same width. 



Sp. 31. ( ) Grapsillus maculatus, n. s. 



Descr. Grapsillus testaceus supra et infra rufo-maculatus maculis rotundis ; thoracis lateribus medio 

 unispinosis, spina brevi acuta ; clypeo medio sub-bilobo utrinque ad oculos emarginato ; 



K 2 



