20S Mr. L. A. Boiralaile — .Vo/e.s on Cur ides. 



V. DiiriNiTiONs OF Xew Species. 



1. PimddJiis {Plesionira) (jraci/is. 



Rostrum loi!?:;, gently upcurved from base, bearing above 

 two strong teeth on a crest over the eye and eight Sj)inules, 

 below a row of small siiarp teeth. Eye wider than stalk, 

 uith distinct oci'lius. First leg simple and s])arsely hairy. 

 Second wrist 9-jointed. Third abdominal tergiim not pro- 

 duced into spine. 



Western Indian Ocean, 200 fath. 



2. lleterocarpns unicarlnatus. 



Related to 77. longirosfris, MacGilchrist, 1005, but without 

 the hinder three-quarters of the autennal carina. 

 Providence I., G37-G65 fath. 



3. lleterocarpns affi-nis. 



Related to //, alpkonsi, Bate, 1888, but has (1) the ros- 

 trum much more strongly upcurved, (2) fewer joints in the 

 second wrists, (3) walking-legs considerably longer than the 

 autennal scale. 



Say a de Malha, 300-500 fath. 



4. Thalassocaris affinis. 



Related to T. lucidus (Dana), 1852, but has (1) the ros- 

 trum less strongly recurved, (2) stronger teeth on the an- 

 tennal scale, (3) the second hand shaped as in T. crinitus. 



Maldives and Saya de Malha. 



5. Thalassocaris iiuddivensis. 



Rostrum at first descending and then horizontal, outreaching 

 autennal scale, ^, two teeth behind orbit. Suborbital and 

 autennal spines only. Autennal scale without teeth. Second 

 leg feeble and simple. No spine on third abdominal tergum. 



Maldive Is. 



G. Tlior maldivensis. 



Rostrum very short, with one tooth above and none below. 

 Supraorbital and autennal spines present. First leg in 

 female stout, simjde, and shorter than third maxilliped, in 

 male as long as body, granulate, stout, but with chela no 

 stouter than rest of limb, arm and handsubequal, fingers one- 

 quarter length of palm, on which they arc bent inward, each 



