132 Memoirs of the Indian Museum. [Vol. IV, 



sixth thoracic is thickly sprinkled with black dots, as are also the lateral portions of 

 the two succeeding somites, the basal segments of the thoracic appendages and the outer 

 uropods. In the third example the distribution of the pigment is precisely similar ; 

 but the chromatophores, which appear to be expanded, form conspicuous black patches. 



As Miers has mentioned, Coronida trachura is very closely allied to C. bradyi (A. 

 Milne-Edwards, 1869) from St. Vincent, Cape Verde Is. According to Milne-Edwards' 

 description C. bradyi appears to be distinct from the Indo-pacific species, but a fresh 

 account of the Atlantic form is badly needed. 



The three specimens of C. trachura in the Indian Museum are registered as 

 follows : — 



^ Mauritius. Purchased. 2<? , 1 9 , 38-40 mm. 



The species has been previously recorded from Mauritius (v. Martens, Miers) 

 from the Red Sea (Nobili) and from the Pelew Is. (Palass Ins.), Caroline group (v. 

 Martens) . 



2. Coronida multituberculata (Borradaile). 



1898. Squilla multihibermilata, Borradaile, Proc. Zool. Soc. p. 38, pi. vi, figs. 7, a-c. 



1899. Squilla multituberculata, Borradaile, in Willey's Zool. Results, p. 403. 



Through the kindness of Mr. E. Doncaster I have been able to examine two of the 

 type specimens of Borradaile' s Squilla multituberculata , and have thereby been able 

 to satisfy myself that the species must be transferred to the genus Coronida. In the 

 total absence of the cervical groove in the median part of the carapace, in the absence 

 of abdominal carinae, and in the proximal inflation of the raptorial dactylus, C. multi- 

 tuberculata agrees very closely with C. trachura, and the ornamentation of the body 

 is, as in the latter species, restricted to the last abdominal somite and telson. More- 

 over, in the minute and peculiar characters afforded by the raptorial propodus and by 

 the basal segment of the uropods, and its spinous process, there is such a close 

 resemblance between the two species that no doubt of their affinity can be entertained. 



The principal characters of C. multituberculata are as follows : — 



The carapace is wide posteriorly and is closely similar to that of the preceding 

 species ; its greatest breadth, however, is less than its median length, excluding the 

 rostrum. The rostrum is longer than wide and has the shape of an inverted triangle, 

 its straight lateral margins diverging anteriorly to a broad, squarely truncate apex. 

 The eyes are dorso-ventrally flattened ; the bilobed cornea is not wider than the stalk 

 and is set obliquely on it. The mandibular palp is entirely absent. 



The dorsal edge of the carpus of the raptorial claw is cut into two large teeth near 

 its distal end. The propodus is proportionately broader than in C. trachura ; on its upper 

 margin it bears a series of conspicuous pectinations, and in its proximal portion three 

 movable spines. Distally the pectinations are replaced by a pair of smooth crests, 

 much as in the preceding species. The dactylus bears four teeth including the terminal 

 one ; the basal part is inflated, though not very strongly so, and the external edge of 

 this inflated part is cut into three blunt teeth, of which the proximal is the largest. 



The fifth thoracic somite resembles that of C. trachura, but the lateral margins of 

 the three following are more truncate, and all the segments of the post- abdomen are 



