124 BULLETIN OF THE 



Subfamily AMATHIINAE. 



The only species of this group hitherto known is the Amathia Rissoana 

 of the Mediterranean Sea. Two species are now added, as follows : — 



Amathia hystrix nov. sp. 



This species has a close resemblance to A. Rissoana, but differs in having 

 four instead of three spines on the gastric region. * 



The dimensions of a male specimen are as follows : Length of carapax, 

 including the rostrum, 1.23; excluding rostrum, 0.71; breadth, including 

 lateral spines, 0.95 ; excluding these spines, 0.48 inch. 



Off Sand Key, May 11, 1869. Cast No. 16. 138 fathoms. 



Amathia modesta nov. sp. 



Carapax armed with twelve spines shorter than in the other species of 

 the genus, the two on the gastric region being in fact only spiniform tuber- 

 cles. The lateral and posterior spines are longest, that on the outer ex- 

 tremity of the branchial region equalling in length one fifth the width of 

 the carapax. Rostrum nearly as long as the post-frontal part of the 

 carapax ; horns rather stout, divergent, and curving outward at the tips. 

 The spine before the eye is small, and that behind still smaller. No trace 

 of a spine at the anterior angles of the buccal area. Feet somewhat 

 shorter than in the other two species, and with no trace of .a spine at the 

 Bummit of the meros-joint. 



Dimensions of a male : Length of carapax, rostrum and posterior spine 

 included, 0.84 ; from base of rostral horns to tip of posterior spine, 0.54 ; 

 breadth of carapax, including spines, 0.50 ; excluding spines, 0.36 ; length 

 of ambulatory foot of the first pair, 0.95 inch. 



Taken off Sand Key in 120 fathoms. 



Subfamily ANOMALOPLNAE. 



This group is indicated for the reception of the genus Anomalopus, now 

 for the first time described, with a single species. The crab differs from all 

 other Maioids in its elongated, subcylindrical carapax, and in the character 

 of its ambulatory feet ; those of the posterior pair being larger than those 

 of the penult pair. The orbital arch is less distinct, than in other Eury- 

 podiidae, and the post-ocular spine much smaller. 



Anomalopus nov. gen. 



Carapax very much elongated, almost subcylindrical ; rostrum very long, 

 slender, bifid. Eyes without orbits ; praaorbital spine small, acute ; post- 



