REPORT ON THE PYCNOGONIDA. 



23 



Family II. CoLOSSENDEiDyE 

 Contains those Pycnogonida which have either rudimentary mandibles or no mandibles 

 at all, strongly-developed palpi and ovigerous legs present in both sexes, and as a rule 

 furnished with denticulate spines. The genera belonging to this group are very numerous : 

 Ammothea, Ascorhynchus, Achelia, and Colossendeis are typical representatives. 



Depth in Fathoms. 



Name. 



Geographical Distribution. 



(^) 



to5 



(?) 



South Carolina. 



Saint Malo (Coast of France). 



Ammothea, Leach (1815). 



Mandibles biarticulate, cheliform, feeble ; palpi nine-jointed; ovigerous legs ten-jointed 



proboscis pyriform. 



Ammothea carolinensis, Leach, Zool. Misc., voL i. p. 34, 



1815, pi. xiii. Of this species a very good drawing 



has been published by Leach. 

 Avwiothea pycnogonoides, Quatrefages, Memoire sur 



I'organisation des Pycnogonides, Ann. d. Sc. Nat. 



3ieme g^j.je, Zool., torn, iv., Paris, 1845. I think 



this species is closely related to A. lonrjipes, Hodge, 



but the descriptions of both authors are so very in- 

 sufficient that this is not to be made out. 

 Ammothea longipes, Hodge, Amu and Mag., 3d series, 



vol. xiu. p. 114, 1864; Grube, Verhandl. d. Schles. 



Gesellsch. f. vat. Ciiltur., 1869-72. The description 



of this species is also quite insufficient; it cannot 



be made out whether the species described by Grube is 



identical with that of Hodge. The specimen of Grube 



is furnished with six-jointed palpi, whence I believe it 



not to have been an adult animal. In all probahUity it 



is the same as that described by Quatrefages as A. pycno- 

 gonoides, Ann. d. Sc. Nat., iii. serie, Zool., torn., iv., 1 845. 



Polperro (English Coast) (St 

 Vaast la Hougue (Grube): 

 Eoscoli' (Grube). 



