312 



BULLETIX 129, UNITED STATES XATIOXAL MUSEUM 



side; 2 prominent pterygostomian spines; other large spines are 2 or 

 4 above the posterior margin besides the median spine and about 4 

 dorsal branchial spines. Smaller dorsal spines and tubercles numerous, 

 including a transverse line of four gastric tubercles in a row between 

 the first and second median spines. Rostrum deflexed, narrowing 

 distally to the terminal spines, which are short and divergent. Inter- 

 orbital space medially canaliculate. A short preocular spine; orbital 

 sinuses closed; 2 small spines beneath the orbit on the basal antennal 

 segment. 



Chelipeds of adult male stronger than the ambulatory legs and 

 longer than the first pair; a spine in the old, a tubercle in the half 



Fig. 104.— Libinia em.\rginat.v, youxg hale (40178), total length of carapace 43 mm., dorsal view. 



(After R.' Rathbun) 



grown, near proximal end of upper surface of merus of cheliped; 

 carpus and chelae rough with pearly granules; palms increasing in 

 width distally; fingei-s about half as long as palm, moderately gaping 

 at base. Ambulatory legs decreasing rapidly in length. 



Color. — A brownish or dirty yellow. 



Variations. — An ovigerous female (15203) from Charlotte Harbor, 

 Florida, approaches somewhat the dubia type. It is an emarginata in 

 the number of median spines and in possessing a sharp tubercle on 

 the arm; but it resembles dubia in the large size of the following spines, 

 viz, the marginal, dorsal branchial, anterior pterygostomian, as well 

 as 3 of the median spines, and in the scarcity of tubercles on the 

 carapace. This specimen I at one time referred to L. distincta.*'^ 



A male and an ovigerous female (20106), between 65 and 75 mm. 

 long from Boca Grande Pass, Florida, are also atypical but in a lesser 



<» Proc. U. S. Nat. Mus., vol. 22, 1900, p. 294, 



