410 On some Crustacea fi-om the Gulf of Akaha. 



out the Oriental region, and westward to the Mauritius and 

 Port Natal. 



Grapsus strigosus. 



Cancer strigosus, Herbst, Naturg. Krabben, &c. iii. (1) p. 55, pi. Ixvii. 



fig. 7 (1799). 

 Grapsus strigosus, Latr. Hist. Crust, et Ins. vi. p. 70 (1803) ; M.-Edw. 



Hist. Nat. Crust, ii. p. 87 (1837) ; A. M.-Edw. Nouv. Arch. Mus. 



Hist. Nat. ix. p. 286 (1873), ubi stjnon. 



Several examples of this very common species were col- 

 lected. The specimens referred by Heller (Sitzungsb. p. 362) 

 to G. pharaonis, M.-Edw., may belong either to this species 

 or the closely allied G. pictus. 



Coenohita rugosa. 



Ccenobita rugosa, M.-Edw. Hist. Nat. Crust, ii. p. 241 (1837) ; Dana, 

 U.S. Expl. Exp. Crust, i. p. 471, pi. xxx. fig. 1 (1852) ; Heller, 

 Sitzungsb. Akad. Wien, xliv. 1. p. 254 (1862). 



A large series of specimens of this common Indo- Pacific 

 species are in the collection ; they seem to have been selected 

 with the view of showing the wide range of selection exhibited 

 by the animal in choosing the shell which forms its habitation. 

 The series collected inhabit shells of the following genera : — 

 Turbo, Fusus, Natica, Purpura, Murex, Tritonium, Ranella, 

 Nassa, Harpa, Terebra, Cerithium, Dolium, Nerita, Cassidulus. 



In all the specimens the large, dark, circular patch on the 

 outer surface of the liand (which is clearly defined in speci- 

 mens from the islands of the Pacific) is indistinct or nearly 

 obliterated. 



Palinurus [Panulirus] penicillatus. 



Astacus penicillatus, Olivier, Encycl. Metb. vi. p. 343 (1791). 



Palinurus gigas, Bosc, Hist. Nat. Crust, ii. p. 93 (1802). 



Palinurus penicillattis, Olivier, Encvcl. M^th. viii. p. 674 (1811) ; M.- 

 Edw. Hist. Nat. Crust, ii. p. 299"'(1837). 



Palinurus Ehrenbergii, Heller, Sitzungsb. Akad. Wissensch. Wien, xliv. 

 1. p. 260, pi. ii. fig. 8 (1862) ; Reise der Novara, Crust, p. 95 (1865). 



Four specimens were collected of this species, all unfortu- 

 nately in more or less imperfect condition. 



Dr. Heller separated the Red- Sea Palinurus Ehrenbergii 

 from the Indo-Pacific P. penicillatus, on account of the spines 

 of the interantennal plate being connate at base in lateral 

 pairs only, and separated in the middle line by an intervening 

 space, and on account of the non-piliferous tubercles of the 

 carapace; I find, however, that one of the Red-Sea specimens 

 collected by Captain Burton has the spines of the carapace as 

 piliferous as those of any of the specimens in the British- 



