390 DR. W. M. TATTERSALL ON THE STOMATOPODA AND 



legs there is a strong median forwardly directed spine, and in front of the 

 bases of the third pair of legs are two transverse chitinous ridges or plates, 

 one on each side, meeting in the centre and separated by a notch. These 

 latter are exactly in the situation occupied by the thelycnm of the Penpeidse, 

 but I have no idea whether they function as such in this species or are even 

 homologous. I have noticed similar structures in H. yerlacliei. 



Distribution. Indo-Pacific, in corals. New to the fauna of the Red Sea. 



H. lutescens is known from Tongatabu (Dana) and the Red Sea (Nobili). 



Harpilius gerlachei, Nobili, 1905 a, p. 160. (PL 28. fig. 9.) 



H. gerlachei, Nobili, 1906 J, p. 45, pi. C. figs. 10, 10« ; Borradaile, 1917, p. 381. 



Locality. Station V. E, 3 ? with eggs, 14-18 mm. 



Remarks. These specimens are in substantial agreement with Nobili's 

 description and figures. The rostrum reaches to about the level of the apex 



of the antennal scale and has the formula -y, all the teeth being on the 



rostrum and none on the carapace. This species is characterized by the 

 absence of a hepatic spine, which together with its tumid form and the shape 

 of the dactyli of the last three pairs of legs serve to render it easily recog- 

 nizable. The dactylus of the last three pairs of legs (PI. 28. fig. 9) is short, 

 stout, strongly curved, and much narrower at its base than the distal 

 extremity of the propodus, which is swollen slightly and appears to have a 

 socket at its apex into which the dactylus can be retracted. 



Distribution. New to the fauna of the Red Sea. Otherwise only known 

 from the Persian Gulf (Nobili). 



Genus Coralliocaris, Stimpson, 1860. 



Coralliocaris superba (Dana, 1852, p. 573, pi. 37. figs. 2 a-/). 



See Borradaile, 1898 b, p. 385, and 1917, p. 383. 



Locality. Station V. E, 2 $ with eggs, 18 and 23 mm. 

 Remarks. This species has no hepatic spine on the carapace. 

 Distribution. Previously recorded from the Red Sea by Paulson and 

 Nobili; East Indies ; Tongatabu; Tahiti. 



Coralliocaris lucina, Nobili, 1901, p. 5. 



C. lamellirostris, De Man, 1902, p. 842, pi. 26. fig. 55. 

 C. lucina, Nobili, 1906 a, p. 57 ; Borradaile, 1917, p. 384. 



Locality. Station V. E, two specimens, 17 and 18 mm. 



Remarks. These specimens agree closely with the descriptions given hy 

 DeMan and Nobili. The only difference I can find from De Man's figures is 

 that there is a greater interval between the fifth (penultimate) tooth of the 



