436 L, A. BORRADAILE. 



Raninidae are probably swimming sand-crabs, somewhat like Matuta in habits, as they are 

 in the shape of the legs, and moving with jerks like the Galatheidae. 



Judging from the contents of their stomachs, de Haan came to the conclusion that 

 Calappa, Matuta and Dorippe feed on other crabs, Leucosia on prawns, and Ranina on fish 

 and starfish. The following systematic list includes the forms taken by the expedition. All 

 those not now described for the first time are of Indian or Indo-pacific distribution. 



Family Calappidae. 



Subfamily Calappinae. Genus Calappa Fabr., 1798. 



1. Calappa hepatica (Linn.), 1764. Alcock, ii. p. 142. (PL XXII. fig. 6.) 

 Taken at Hulule, Male Atoll and in Minikoi lagoon down to 5 fathoms. 



2. Calappa gallus (Hbst.), 1803. Alcock, ii. p. 146. 



Dredged in Felidu, Haddumati and Suvadiva Atolls in 25 — 43 fathoms. 



3. Calappa depressa Miers, 1886. 



Miers, Challenger Brachyura, p. 287, PI. XXIII. Fig. 2 (1886). 

 Dredged in Suvadiva Atoll in 43 fathoms. 



4. Calappa pustulosa Ale, 1896, var. See Alcock, ii. p. 147. 



The specimens differ from the type in that: (1) the shields at the sides of the carapace 

 are better developed, resembling those of C. depressa Miers; (2) the endostomial septum is 

 complete in its hinder half and hollowed out in its anterior half only; (3) the whole antero- 

 lateral edge is toothed (as in Alcock's figure. In his description he says that the anterior 

 half is smooth). The name clypeata would be a suitable one to apply to this variety. 



Dredged in Haddumati and Mulaku Atolls, in 30 — 39 fathoms. 



Genus Cryptosoma Brulle, 1837. 



5. Cryptosoma granulosum (de Haan), 1835. Alcock, II. p. 182. 

 Dredged in Suvadiva and South Nilandu Atolls, in 30 — 43 fathoms. 



Subfamily Matutinae. Genus Matuta Fabr., 1798. 



6. Matuta banksi Leach 1817. Alcock, ii. p. 158. (PI. XXII. fig. 4.) 

 Taken in Hulule, Male Atoll. 



Family Leucosiidae. 



Subfamily Iieucosiinae. Genus Oreophorus Ruppell, 1830. 



7. Oreophorus reticulatus Ad. and Wh., 1850. Alcock, ii. p. 174. 



Besides a full-grown male, there is in the collection a very small one which closely 

 resembles the adult, and is not at all like the specimen figured by Adams and White as 

 the young of this species [" Samarang " Crustacea, PI. VI. Fig. 2]. 



Dredged in Kolumadulu and Fadifolu Atolls in 38 and 23 fathoms. 



