1 14 llev. T. 1{. K. Stebbing on new 



pods of ^. littorinci] and though this form is less conspicuous 



than the other for beautiful fringes of shining hairs on various 



parts of the meros, the wrist, and the hand, it nevertheless 



has these fringes, only of less length, and, what is more, has l| 



them disposed just as they are in the other species : in both • 



gnathopods they are set round the distal extremity of the meros 



and distally round tlie back and front of the wrist, on the back 



and front margin of the hand, on the palm, and on the inner 



side of both hand and wrist. The antennte also are adorned 



with similar hairs — long ones at the articulations of the 



peduncle, and short tufts or fringes at intervals round the 



cylindrical or subcylindrical pieces which compose it : these 



ornaments, again, are shorter and less attractive in A. lit- 



torina. 



In the 'British Sessile-eyed Crustacea' there is a sliglit 

 difference in the figuring of the telsons of the two forms — a 

 difference, however, not again mentioned by Mr. Spence Bate 

 in his British-Museum Catalogue. The specimen of wdiich I 

 have drawn the tail-piece appeared to be ^. riihricata^ but Avas 

 taken within tide-marks. The telson differs from both the 

 forms previously figured, being truncate and indented at the 

 distal end. The stems of the last, pair of pleopoda have their 

 distal ends toothed or crenated. 



On the whole we may, I think, accept these two species as 

 an example of those insensible gradations between varying 

 forms of a common origin, in which some persons find it so 

 difficult to believe. 



Sunmnphithoe gammaroides (male and female). Pis. XL & 

 XII. figs. 3, 3 a-/. 



This species is probably the same as Mr. Spence Bate's 

 Amphitlioe gammaroides^ w^hich, however, was described and 

 named from "dried and imperfect specimens" not exhibiting 

 the telson, in the shape of which consists the one generic 

 distinction between Amphitlioe and SunampJiithoe. 



My specimens were taken throughout the year in rock -pools 

 at Mcadfoot and Goodrington, Torquay. The colouring is a 

 bright yellowish green, Avith sparse but conspicuous black dots, 

 chiefly on the coxte. In these respects and in the shape of the 

 pereiopoda they agree with Ainj^hifhoe gammaroides. The 

 eyes, however, are not black but red — a point of minor import- 

 ance, as the colour of the eyes seems to vary in more than one 

 species. The peduncles of the antennae agree approximately : 

 in the upper pair the second joint is scarcely so long as the 

 first, in accordance with the figure, but not with tlie description 



