BORRADAILE— ON THE PONTONIIN^ 365 



Subgenus Coknigee, Borradaile, 1915. 



Ann. Mag. Nat. Hist. (8), xv. p. 207. 



Definition : Rostrum toothed, but without teeth behind orbit ; its upper edge 

 convex, but sometimes only slightly so. Antennal, hepatic, and strong supraorbital spines 

 present. Eye ogival. Second leg at present only known in one species, where it is 

 unarmed and has short wrist. 



Key to the species of Periclimenes (Corniger) : 



I. Rostrum lanceolate, outreached by antennular stalk. 



A. Rostrum deep, ^. Eye without papilla. 



P. (C) cornutus Borradaile, 1915. 



B. Rostrum shallow, ^. Eye with papilla at apex. 



P. (C.) ceratophthalmus Borradaile, 1915. 



II. Rostrum with upper edge but slightly convex and lower edge straight till 

 within short distance of tip, which is slightly upturned. Antennular stalk outreached 

 by rostrum. [R-=-f--] 



P. (C.) amboinensis (de Man), 1887. 



1. (Type.) Periclimenes {Corniger) ceratophthalmus Borradaile, 1915 (Plate 54, 

 fig. 9). 



Ann. Mag. Nat. Hist. (8), xv. p. 211. 



Definition : Body not much compressed ; rostrum outreached barely by antennular 

 stalk but distinctly by antennal scale, straight, shallow, lanceolate, bearing above four 

 teeth, all in its distal half, and no teeth below ; eye ogival, ending in a papilla ; supra- 

 orbital, antennal and hepatic spines present ; first joint of antennular stalk not greatly 

 expanded, with moderate stylocerite, second and third joints stout and subequal, flagella 

 short ; antennal stalk about f length of first joint of antennule, scale broad, with small 

 distal tooth set well back from end ; third maxilliped short, rather stout ; first leg 

 outreaching antennal sbale by its fingers, its arm and wrist subequal, hand about half 

 length of wrist ; second leg outreaching antennal scale by nearly the whole of its hand, 

 stout, with short wrist and no spines on any joint, hand flattened, parallel-sided, with 

 fingers simple and about | length of hand ; telson considerably shorter than uropods. 



Length of the single specimen, 8 mm. 



Male Atoll, Maldive Is., on crinoid, with polycheete. 



2. Periclimenes (Corniger) cornutus Borradaile, 1915 (Plate 54, fig. 10). 

 Ann. Mag. Nat. Hist. (8), xv. p. 211. 



Definition : Body moderately compressed ; rostrum outreached slightly by antennular 

 stalk and rather more by antennal scale, lanceolate, deep, bearing above seven teeth, 

 none behind orbit, and one tooth below; antennal, hepatic close behind antennal, and 

 strong, compressed supraorbital spines present ; cornea ogival ; first joint of antennule 



