56 mr. e. j. miers on crustacea from [jan. 14, 



Telmessus. 

 Telmessus, White, Ann. & Mag. Nat. Hist. (ser. 1) xvii. p. 497 

 (1846). 



Platycorystes, Brandt, Bull. Phys. Math. Acad. Petersh. vii. p. 



179(1849). 



Cheiragonus, Stimpson, Boston Journ. Nat. Hist. vi. p. 4G5 



(1857). 



The term Cheiragonus appears to have heen adopted for this 

 genus on insufficient grounds ; it is referred to by Latreille, without 

 description, simply as follows: — " g. Cheiragone (Mem. de I'Acad. 

 de St. Petersb. 1812)," (see Fam. Nat. Regne Anim. p. 270, 1825). 

 On referring to Tilesius' specific description in (Me'm. Acad. Petersb. 

 V, p. 347, pi. vii. fig. 1, 1815), we find it headed Cheiragonus, the 

 description commencing with the words Cancer cheiragonus. It 

 seems evident to me that Tilesius intended the term Cheiragonus as 

 a specific name for the Kamtchatkan species, which must be 

 designated Telmessus cheiragonus, as White's generic name Telmessus 

 comes next in priority and is accompanied by a description. 



Telmessits actjtidens. 



Cheirogonus acutidens, Stimpson, Proc. Ac. Nat. Sci. Phil. p. 

 40 (1858). 



Japan, Kunashir, lat. 43° 34' N., long. 145° 20' E., at 11 fathoms, 

 on a bottom of small stones, three specimens, and N.E. of Yedo 

 Island, in lat. 44° 27' N., long. 14° 22' E., one specimen. 



This species is separated from- the Telmessus serratus of the 

 western American coast by a very slight character, the somewhat 

 longer and slenderer teeth of the lateral margins, particularly the 

 third tooth ; yet the distinction is constant as far as the series before 

 me serves to prove. Two of the specimens are prettily speckled 

 with brownish red, the spots being visible beneath the close 

 pubescence of the carapace. The carapace of the largest of the 

 four specimens only measures f inch in length ; and the form of 

 the teeth might undergo some modification as the animal increases 

 in size. 



It was previously unrepresented in the British-Museum collection. 



Tilesius' species, Telmessus cheiragonus from Kamtchatka, is de- 

 scribed arid figured as having much longer and slenderer marginal 

 spines than even T. acutidens ; and in the absence of specimens for 

 comparison, I cannot unite the two species. 



Catometopa vel Grapsoidea. 



MACROPHTHALMIDiE. 



Gelasimus lacteus. 



Ocypodc {Gelasimus) lactea, De Haan, Faun. Japon., Crust, pp. 

 26, 54, pi. XV. fig. 5 (1835) ; M.-Edw.?, Ann, Sci, Nat. (ser. 3), 

 Zool. xviii. p. 150, pi. iv. fig. 16 (1852). 



Four specimens (males) are in the collection, without any particulars 

 regarding the locality at which they were collected. 



