231 



of the buccal cavity narrowing backward again suggests that my specimen indeed is nothing 

 but the 9 of the preceding species. We must await more material before this question may 

 be solved ; for the present it seems preferable to establish a new species. 

 Dimensions in mm.: 



Fronto-orbital distance . . 4.3 



Width of front at base . 

 Breadth of carapace . 

 Length of carapace . 

 Base of abdomen . 



2.1 



8.5 

 6.5 

 4.2 



3. Typhlocarcinodes pirociilatus (Rathbun). PI. 15, Fig. 2. 



191 1. Typhlocarcinops piroculata Rathbun. Transact. Linn. Soc. London (2), v. 14, p. 239, 

 pi. 20, f. 1—2. 



Stat. 133. Lirung, Talaut Islands. Depth up to 36 m. i cf. 



This species is distinguished at lirst glance from the two preceding species by the carapace 

 being proportionately broader, by the fronto-orbital distance being distinctly more than one-half 

 the greatest breadth of the carapace, by the great reduction of the granulation and the absence 

 of grooves, and by the postero-lateral margins being almost parallel. The antennulae, the walking 

 legs and the abdomen are also different in the present species. 



The carapace is flattened transversely, much convex in longitudinal direction, especially 

 anteriorly, so that the front is strongly deflexed. As has been said, there are no granules 

 on the carapace, except som e very mi nu te ones towards the margins, which 

 are slightly raised ^), and neither are the various regions defined, the only sculpture consisting 

 of a faint longitudinal groove parting from the front and bifurcating distally and in two curved 

 ones, (branchio-cardiac grooves) with the convexities turned towards each other, at the level of 

 the cervical groove. 



The front is rather broad, twice as broad as either orbit, narrowing anteriorly, but the 

 anterior margin is but little arched, and lateral angles are distinctly developed (fig. 2 d). The 

 eye-peduncles are firmly fixed within the orbits, pear-shaped and greatly bulging at the base. 

 Miss Rathbun notes small corneae, of which I did not detect any tracé, only a rather large 

 speek of pigment within the eye-stalk shining through the tegument, at a little distance back 

 from the tip of the peduncle. The feathered hairs across the front are neatly arranged 

 along the anterior margin and are continued across the eye-stalks and all along the lateral 

 margins of the carapace. The latter are greatly arched, so that the carapace is proportionately 

 broader than in the two preceding species; two faint notches, at the level of the greatest 

 breadth, denote the transition between antero- and postero-lateral margins, and behind these 

 notches the margins are nearly parallel, very faintly converging backward. The posterior 

 margin is very little convex. 



Antennulae of the usual shape and in the usual position. Antennae remarkable by the 



l) "Sides with a raised, granulate rim" (Rathbun). 



83 



