Decapod Crustacea of Bermuda, Part II. 33 



Tribe THALASSINIDEA. 



The species included in this group are adapted for burrowing, 

 having habits similar to Sqiiilla. The body, especially the abdo- 

 men, is elongated and weak, with the segments not overlapping. 

 The carapace is short and feebly developed ; rostrum small or 

 lacking. Third pair of legs not chelate ; chelae usually present 

 on the first pair and often on the second. Antennules and antennas 

 are elongated, peduncle of antenna is 5-jointed, usually without a 

 scale. Last segment of thorax is movable. 



Family CALLIANASSID^ Dana, 1852. 



Rostrum is very small or lacking; eye-stalks are flattened. 

 First pair of legs have unequal chelae; third and fourth pairs are 

 not chelate. Uropods and telson are large. Gills are filamentous. 



Glypturus Stimpson. 



Glypturus Stimpson, Proc. Chicago Acad. Science, vol. i, p. 46, 1866. 

 Annals Lye. Nat. Hist. N. York, vol. x, p. 120, 1871. M. J. Rathbun, 

 Brach. and Macr. Porto Rico, p. 93, 1901 (descr.). 



This genus is closely related to Callianassa. It is most readily 

 distinguished by the form of the outer maxilliped, which has the 

 propodus dilated and about as broad as the merus and ischium, 

 while in the latter it is distinctly narrower than the two preceding 

 segments. 



Glypturus branneri M. J. Rathbun. 



Glypturus branneri Rathbun, Branner-Agassiz Exped. to Brazil, Proc. 

 Wash. Acad. Sci., vol. i, p. 150, pi. viii, figs. 5-8, 1900 (descr.) ; 

 Brachyura and Macr. of Porto Rico, p. 93, 1901 (descr.). 



PLATE I, FIGURE 2. PLATE VIII, FIGURES I-IA E. 



Front with a short, acute, depressed rostrum and with a shorter 

 inconspicuous, obtuse lobe on each side above the bases of the 

 antennae, but without spines. Dorsal suture deep. Larger 

 cheliped is compressed, very smooth above, polished, finely and 

 inconspicuously denticulated on its lower margin and on the distal 

 articular edges. The cutting edge of the dactyl has two unequal, 

 lobe-like teeth. The larger chela has the palm nearly as wide as 

 long ; the dactyl is smooth and polished, denticulate below ; the 



