ARACHNOIDEA. 573 



Pycnogonum BRUENN. Body depressed. Feet not longer than 

 body, thick. 



Sp. Pycnogonum littorale, Phalangium balcenamm L., BASTER Nat. Uitsp. 

 ii. Tab. xn. fig. 3, A D, PALLAS Misc. Zool. Tab. xiv. figs. 21 23, 

 GUERIN Iconogr., Arachn. PL 4, fig. i ; this animal, with other marine 

 productions, is often cast upon our beach dead. The pair of feet that the 

 female possesses above the male was already noted by BASTER as a sexual 

 difference. 



Proxichilus LATR. (in part), EDW. Body linear, feet slender, 

 very long. 



Sp. Proxichilus spinosus MONT., CUVIER R. Ani. 6d. ill., Arachn. PI. 21, 

 fig. i. 



B. Two mandibles chelate, palps none. 



Phoxichilidium EDW., KROEYER (Orithyia JOHNST.) Accessory 

 feet proper to females alone, without claws. 



Sp. Phoxichilidium femoratum, Nymphon femoratum, J. RATHKE STcrivter of. 

 naturh. Selskabet, v. i. Kiobenhavn, 1799, P- 2O1 > -^ v - ^8- H - 



Pallene JOHNST., KROEYER. Accessory feet in both sexes ter- 

 minated by a claw. 



Sp. Pallene spinipes, Pycnogonum spinipes OTH. FABR., Fauna Groenl. p. 232. 



C. Two mandibles ; two palps. Accessory feet, oviferous in 

 both sexes. 



Zetes KROEYER. Rostrum very large, biarticulate. Feet scarcely 

 longer than body. Mandibles filiform, short, not chelate. 



Sp. Zetes hispidus KROEYER. 

 Paribcea PfilLlPPl. 



Nymphon FABR. Rostrum uniarticulate, elongate. Mandibles 

 chelate. Feet very long (surpassing the length of animal three 

 times or more). 



Sp. Nymphon grossipes, Pycnog. grossipes O. FABR. (in part), GuHiRiN 

 Iconogr., Arachn. PI. 4, fig. 3. 



Ammothea LEACH. 



Sp. Amm. carolinensis LEACH 1. 1. Tab. 13, Encyclop. meth. Crust, et Ins. 

 PL 327, % 6. 



D. Mandibles none, two palps. 

 Endeis PHILIPPT. 



