142 Proceedings of the Hoy al Irish Academi/. 



rock fissures, and it may often be seen running on the rocks. The shore 

 records under the name B. capUlata Kramer in (25) should refer to the 

 present species. Tlior records this as the type-species of the genus Molgus, and 

 gives the following synonymy: Muhjiis lUtora/is (Linne), 1758. M. arcticus 

 (Thorellj, 1871. M. viUosiis (Kramer), 1883. J/. Basteri (Michael), 1896 

 (Zool. Auz. Xr.II, p. 30). 



Bdella decipiens Tlior. 



Equally common with the last at Malahide, and frequenting the same 



zones in from almost dry to moist place.s. It often occurs in company with 



the preceding species, and both have been observed feeding on Nanorchestes 



on the rocky shore at Malahide. The synonymy and distribution are recorded 



in (25). 



Cyta latirostris (Herm.). 



A few specimens found under stones in Malaiiide estuary, May, 1915 ; 

 shore of Mweeloon Bay at Ardfry, June, 1916. 



The typical form of this species is figured by Berle.se (2, Fasc. ux, n. 4) 

 of a rosy-red colour, while the specimens from the above localities are of a 

 dull yellow ; they are also larger, the lengtli being at least 900//, ii<iL 

 including the mandibles. It is a widely distributed species. 



Family RHAPHIGNATHIDAE. 

 Rhaphignathos scutatus s\>. nov. (I'l. Will, 26 a, b.) 



Colour, l>right red. Length, 518/i; breadtii, 330/t ; shape, a rather broad 

 oval; epidermis striated, except on the dorsal shields, which are minutely 

 punctured, and are only very faintly reticulate. Cephalothora.x covered by 

 a large shield, with three pairs of strong marginal hairs ; inimcdiately behind 

 the first pair are the single-lensed eyes ; tlie hinder margin of the shield is 

 weakly emarginate. The aMomen is also piotected by a large dorsal plate, 

 carrying six pairs of haire ; front margin straight ; end margin evenly 

 rounded, leaving a rather broad uncovered area at the end of the alxlDmon, 

 where there are two pairs of haire. The sho\d<ier bristles are placed on small 

 oval plate-s. Epiniera mucli as in B. sunihtn. Anal plate rounded in front 

 and tapering to a point at end, rather distinctly reticulate on its anterior 

 part (length, 170/u ; breadth, 125/1). Mandibles a little shorter and more 

 robust than on B. sicitius. Palps (fig. 26 b) stout; a strong hair springs 

 from the upper surface of second and third segments. Terminal appendage 

 about reaching to end of fourth segment, with four hairs and a trifid hair. 



This .species st^inda nearest to B. ■■iicn/uJi Berl. (2 Fa.sc. xxil, n. 3j, from 

 which it differs in the larger size, less elongate shape, longer legs, and the 



