MR. E. J. MIERS ON THE OXYSTOMATOUS CRUSTACEA. 245 



3. Mattjta lineieera, sp. n. (Plate XXXIX. fig. 7.) Nearly allied to the preceding, 



but with the carapace more finely granulated, the tubercles more strongly marked, 

 the two anterior distinct, as are also those of the posterolateral margins. Lines 

 upon the carapace dark red, very fine, thread-like, usually uninterrupted, and 

 forming complete but irregular loops and circles. Length If in. ; breadth If in. 



Sab. N.W. Australia, Nicol Bay. 



Only a single male adult specimen is in the collection. A larger series of specimens 

 might show that it is but a variety of the foregoing. 



(B) Hand of male with an interrupted ridge, or series of tubercles and spines, crossing its external surface 

 parallel to the lower margin, and terminating at the base of the upper margin of the lower {immobile) 

 finger. The ridge upon the outer surface of the mobile finger obsolete, or smooth, or very finely striated at 

 base, and beaded only towards the distal extremity. 



(a) Carapace marked with spots or blotches. 



4. Mattjta granulosa*, sp. n. (Plate XXXIX. figs. 8 & 9.) Carapace rather coarsely 



granulated, especially towards the lateral marginal spines. Two anterior dorsal 

 tubercles obsolete, the others and those on the posterolateral margins very indistinct. 

 Lateral marginal spines short, conical, and rather obtuse ; front slightly but 

 distinctly emarginate, with the lobes rounded. Hand of male with the upper and 

 lower part granulous between the tubercles ; the ridge upon the outer surface in 

 the male divided into five acute tubercles, of which the second is the largest. Bidge 

 upon the external surface of the mobile finger thin, smooth, not beaded. Spots 

 upon the carapace brownish red, of the same shape as in M. victrix, var. crebre- 

 punctata, but less numerous. A brownish-red patch upon the basal half of each 

 lateral spine. Length and breadth nearly 1^ in. 

 Hab. Eastern seas. 

 In the female of this species the tubercles of the ridge upon the external surface of 



the palm are disposed as in the males. The ridge upon the external surface of the 



mobile finger is obsolete. 



5. Mattjta banksii. (Plate XL. figs. 1 & 2.) 



Matuta banksii, Leach, Zool. Miscell. iii. p. 14 (1817) ? 



Carapace very coarsely granulated, especially in the centre and towards the lateral spines ; 



the tubercles, as well as those of the posterolateral margins, very strong and distinct. 



Lateral marginal spines of moderate length, acute ; front obtuse and rounded, or 



* Since the description of this species was drawn up (from three specimens, of which the exact locality is unknown, 

 in the collection of the British Museum) I have had the opportunity of examining a series of seventeen specimens of 

 both sexes and different ages in a collection made by Mr. Mac Earlane on the islands of the Torres Straits. These 

 examples show that M. granulosa is never to be confounded with its nearest allies, M. banksii and M. maculata, 

 from which it is always distinguishable by its coloration, the absence of the anterior pair of dorsal tubercles, &c. 

 The characters generally are subject to little variation : the only points I have observed are, that in some specimens 

 the tubercles are rather more clearly defined, and the ridge on the outer surface of the mobile finger faintly striated 

 at its distal extremity, as in other species of this section of the genus. 



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