CEUSTACEA. 309 



inner ramus of the uropoda, have the external genital appendages 

 proper to the male sex, which are not to be found on any of the 

 specimens I regard as the females of t his species, several of which, 

 on the contrary, carry ova. In several instances I have found the 

 two forms associated in the same phial in the Museum collection. 



I refer to this species the following females in the 'Alert' collec- 

 tion, which may, however, belong to the variety crassicaudata, 

 Haswell : — 



An adult example from Port Jackson, 5-7 fms. (No. 104), whence 

 also Mr. Haswell records it as Cymodocea pubescens ; also one from 

 Thursday It-land, 4-5 fms. (No. 165). These specimens have the 

 outer ramus of the uropoda acute, with a strong tooth on its outer 

 margin, and closely resemble S. pubescens as described by Milne- 

 Edwards. 



Smaller specimens are in the collection from Port Curtis, 7 fms., 

 and Albany Island, 3-4 fms., which have the body less pubescent 

 and the postabdomen more distinctly granulated, the rami of the 

 uropoda somewhat shorter, the outer ramus subacute or even obtuse, 

 with the tooth on its outer margin very faintly defined or obsolete. 



The rounded elevations on the upper surface of the terminal 

 segment vary much in prominence in this species. In two females 

 from King George's Sound, West Australia, which may belong to a 

 distinct species, they are very prominent, conical, and subacute. 

 An approach to this form is, however, exhibited in one of Leach's 

 types (a male). 



A good series of both sexes of Ciliccea latreillei from the Australian 

 seas is in the British Museum from the collection of the late 

 Dr. J. S. Bowerbank. Unfortunately the exact locality has not been 

 preserved. 



Mr. Thomson * has described a species of this genus (as I think) 

 from Dunedin, New Zealand, under the name of Ncesea caniculata, 

 which is allied to C. latreillei, but distinguished by the broadly 

 truncated process of the first postabdominal segment. 



11. Cilicaea latreillei, var. crassicaudata (Hasivell). 



A male and female are in the collection from the Arafura Sea, 

 32-36 fms. (No. 160), and also a male and two females without 

 special indication of locality (No. 123). 



This form comes extremely near to Ciliccea latreillei, Leach, and 

 must, I think, be considered a mere variety of it. It is distinguished 

 by the longer, less conical median process of the penultimate post- 

 abdominal segment, and the much longer outer ramus of the uro- 

 poda, which is not toothed on its outer margin. 



I have observed males of the typical form in which the tooth on 

 the outer margin of the outer uropod is obsolete. 



There is in the British-Museum collection a specimen from Bass 



* Trans. New-Zeal. Inst. xi. p. 234, pi. x. fig. A 7 (1879). 



