492 REPORT OK THE ORDER STOMATOPODA—BIGELOW. volxvii. 



species one may expect to flud on each side of tlie median line of the 

 telson three or four submedian denticles, from four to eight interme- 

 diate ones, and one lateral one. 



ANALYTICAL KFA' TO THE GENERA OF SQUILLIDE. 



I. Sixth abdoraiual somite more or less completely fused with the telson. 



The dactylus of the raptorial limb dilated at the base and without lateral teeth. 



Protosquilla, Brooks. 



II. Sixth abdominal somite separated from the telson by a flexible joint. 



1. Dactylus of the raptorial liml) dilated at the base, and the manus without 



pectinations. 

 a. Antenuary scales and uropods not unusually small. 



Hind body strongly convex; raptorial dactyli without lateral teeth. 



GoxoDACTYH'S, Latreille. 

 Hind body moderatelj' convex; raptorial dactyli armed with lateral 



teeth Odoxtodactylus, new genus- 



h. Antennai'y scales and uropods A^ery small; hind body depressed; raptorial 

 dactyli with lateral teeth Coronida, Brooks. 



2. The dactylus of the raptorial limb, as a rule, not dilated at the base (dilated 



in LeptosquiUa) and the manus provided with minute pectina- 

 tions on the inner margin. 

 a. Telson with 6 marginal spines and never more than 4 denticles between 

 the submedian and intermediate spines. 

 Body compact and convex; dactylus of raptorial limb not dilated and 

 with not more than 8 lateral teeth or unarmed. 



Pseuoosquilla, Gndrin. 



Body loosely articulated and flattened; dactylus of raptorial limb not 



dilated and witli at least 5 lateral teeth.. Lysiosquilla, Dana, 



h. Telson with 6 (rarely 8) marginal spines and, as a rule, with more than 



4 intermediate denticles. 



* Lateral margins of the first 5 abdominal somites expanded to equal 



three-fourths of the width of the median portion, measured 

 between articulations. 

 Raptorial dactylus not dilated, with 10 to 11 teeth; abdomen, except 

 the sixth somite, without submedian carina?. 



Pterygosquilla, Ililgendorf. 



* * Lateral margins of the abdominal somites not greatly expanded, 



about one-fourth the width of the median portion. 



Ophthalmic segment greatly elongated and prolonged beyond the 

 rostrum for more than half its length; raptorial dactylus dilated 

 at the base; abdomen, except sixth somite, without submedian 

 carina? ; eyes cylindrical Leptosquilla, Miers. 



Ophthalmic segment not greatly elongated; raptorial dactylus not 

 dilated, or very slightly so Squilla, Fabricius. 



Genus G O N O D A C T Y L U S, Latreille. 



Oonodactijlns, Latreille, Encycl. Moth. Hist. Nat., x, p. 473, 1825; Cr. in Cnvier, 

 Regno Auim., iv, p. 109, 1829. — Milxe-Edwards, Hist. Nat. Crust., ii, p. 528, 

 1837. — DE Haan, Siebold's Fauna Japonica, Crust., p. 220, 1849. — Dana, U. S. 

 Expl. Exp., XIII, p. 615, 1852.— Miers, Ann. and Mag. Nat. Hist. (5) v, p. 115, 

 1880. — Brooks, Voyage of the Challenger, xvi, ii, p. 55, 1886. 



Diagnosis. — Stomatopoda having- a movable joint between the sixth 

 abdominal segment and the telson; the hind body convex; the dacty- 

 lus of the raptorial claw enlarged at the base and with a sharp inner 



