Fauna Associated with Crinoids of Tropical Coral Reef, etc. 89 



ISOPODA. 

 Cirolana lineata sp. n. (Plate 1, Fig. 4.) 



This species comes under the second section of the genus as divided 

 by Hansen,* in which are included all species with the following 

 characters : 



"Lamina frontalis inermis, lata brevis, pentagona (varius fere hexagona), 

 vix dimidio longior quam latior. 



"Clypeus inermis, non cormitus, ante perspicue cum lamina frontali con- 

 junctus. 



"Antennulae pedunculo obscure triarticulato (primo visu biarticulato) 

 fiagello semper satis gracili.f 



"Pedes omnes setis perpaucis vel nullis instructis." 



FIG. G. Cii'olaua liivata sp. n. 

 For whole animal see plate 1, fig. 4. All figures except E are of the female. 



A. Antennae and frontal lamina.J 



B. Maxilliped. X38. 



C. Sixth thoracic leg. X18. 



D. Seventh (horacic leg. X18. 



E. Second pleopod of male, showing appendix mas- 



culina. X 18. 



F. Telson and uropods. X18. 



Diagnosis: A small cirolanid, body ovate (female), rather more than twice 

 as long as broad. Measurements, female 6 mm. in length, 2.5 mm. in breadth; 

 male 4.7 mm. in length, 1.5 mm. in breadth. Occurs on crinoids, generally 

 Comanthus annulatum, in Torres Straits. Colour white except, for branding 

 chromatophores carrying a purple pigment and arranged in two lateral stripes 

 and a fainter median line. 



Head wider than long, anterior margin rounded. Eyes of medium size. 

 First antenna stout, first joint of peduncle large, second a little smaller, and 



*Hansen: Cirolanida: et familiar nounulUe propinquse Musei Hauniensis. Kjobenhavn. 1890. 

 See p. 330. 



fBut I take exception to the definition of the peduncle as always so obscurely triarticulate; and 

 the condition of the peduncle in my species seems to resemble that in C. pana established by 

 Hausen, which from the figure is clearly triarticulate. 



JThe duties of the author as an officer in the British Army, prevented his attention to this 

 paper as it was going through the press, and figure A was unobtainable. 



