490 



DR G. S. BRADY ON 



Genus Anchistrocheles, Brady and Norman.* 



Shell reniform, mucli compressed ; anterior extremity very oblique, ventral margin 

 deeply sinuated. Antennules six-jointed,tthe last five joints nearly equal and very short, 

 their united length only equalling about one-third of the first joint, hairless except the first 

 and fifth joints, each of which bears a single seta of moderate length ; the only fully setiferous 

 joint is the last, which bears an apical brush of about ten long setae ; antennae five-jointed, 

 bearing at the apex two rather long setae and a still longer curved claw, which consider- 



Anchistrocheles furmta. 



1, Antennule ; 2, Antenna ; 3, Mandible ; 4, Maxilla ; 5, Branchial plate 

 of maxilla ; 6, Foot of first pair (a) rudimentary second maxilla ; 

 7, Foot of second pair ; 8, Caudal ramus ; 9, Copulative organ of 

 male (v.d.), vas deferens (all much magnified). 



ably exceeds in length the entire limb, and is bent rectangularly at the apex, so as to form 

 a minute hook. Mandible slender, toothed at the apex ; first joint of the palp bearing a 

 small trisetose branchial appendage, but otherwise almost destitute of setae, except at the 

 apex. First pair of maxillae provided with a branchial plate of moderate size ; second 

 pair (?) rudimentary, in the form of a setiferous, one-jointed appendage attached to the 



* Trans. Royal Dublin Soc, vol. iv. Series II. p. 110. 



t These anatomical details being taken from dried specimens, were not easily made out, and the number of joints 

 here given differs from that of the Royal Dublin Society Memoir. I think the present enumeration is correct. 



