266 L. A. BORRADAILE. 



Genus Quadrella Dana, 1851. 



86. Quadrella coronata Dana, 1852. Var. granulosa n. See Alcock, iii. p. 266. 



All the specimens of Quadrella coronata in the collection belong to a new variety, which 

 differs from the type in the following features: (1) The carapace is distinctly broader than 

 long. (2) The chelipeds are only about 2i times as long as the carapace. (3) The chelipeds 

 are frosted over with tiny granules set in short rows athwart the limb. On the underside 

 of the hand the granules are less regular in arrangement, and, projecting in profile, give 

 the inner (lower) edge of the hand an in-egular, fine denticulation. (4) The colour in spirit is 

 a uniform pale flesh-colour, purplish in places. 



By the first three of these features the new variety is allied to var. maculosa Ale, but 

 it differs from that variety in the following points : (1) The fore edge of the arm is not 

 serrate, but bears about ten long thorns. (2) The coloration in spirit is different. 



The following key shows the jDrincipal characters which separate the known varieties of 

 Q. coronata: 



I. Carapace as long as broad. Chelipeds polished. Colour in spirit uniform milk-white. 

 [Fore edge of arm spined. Chelipeds 2f times the length of the carapace.] 



Var. A, type Dana, 1851. 



II. Carapace broader than long. Chelipeds more or less frosted over with granules. 

 More or less colour on the body. 



A. Fore edge of arm spined. Colour in spirit uniform pale flesh-colour. [Chelipeds 

 2^ times the length of the carapace.] 



Var. B, granulosa n. 



B. Fore edge of arm serrate or finely denticulate. Colour arranged in a pattern. 



i. Fore edge of arm serrate. Chelipeds 2^ times the length of the carapace. 

 Colour in a network of fine lines. 



Var. C, reticulata Ale, 1898. 



ii. Fore edge of arm finely denticulate. Chelipeds 2f times the length of the 

 carapace (?). Colour in tiny purple dots. 



Var. D, maculata Ale, 1898. 



Var. granulosa was taken on a Gorgonacean dredged in 39 fathoms in Suvadiva Atoll 

 and on a red Alcyonarian dredged in 25 ftithoms in the same Atoll, and was dredged in 

 23 fathoms in Mahlos Atoll. 



87. Quadrella bispinosa, n. sp. (Fig. 58.) 



Diagnosis : " A Quadrella which is near akin to Q. coronata but differs fi'om it in the 

 following points: (1) The carapace is distinctly broader than long. (2) There is a spine on 

 the anterolateral edge of the carapace, rather farther from the spine at the outer angle of 



