2 3 o DISCOVERY REPORTS 



but here they are also along the abdomen. Telson more slender with a longer first spine, eye much 

 larger. Abdominal somites pointed posteriorly but without small teeth above the lateral spines. Main 

 spine of upper lobe of maxillule very conspicuous. 



It seems certain that these larvae are pagurids but of a type hitherto unknown. Gurney (1924, 

 p. 156, fig. 62) figured and described a larva attributed to the Laomediidae, but later (1938, p. 156) 

 regarded by him as a pagurid, which has features in some way resembling the present larvae. The 

 abdominal somites 2 and 3 have backwardly directed spines, the rostrum is not unlike, the telson 

 deeply indented. 



This larva of Gurney's is at stage III and therefore in many ways different, but the exite of the 

 maxilla is armed on the posterior lobe in a similar way to the Bermuda larva. 



These larvae all show the thalassinid characters well and seem to emphasize the resemblance, which 

 Gurney pointed out (1938) between the Upogebia and the Laomedia type of thalassinid larvae and the 

 pagurid larvae. 



There are other pagurid larvae (at least three species) to be found in Bermuda, all of which have 

 a deeply hollowed telson in the first stage and two of these are much alike. These were attributed to 

 Clibanarius, as that is the commonest genus in Bermuda, moreover the C. misanthropus larva described 

 and figured by various authors (Williamson, 1915 ; Hesse, 1876; etc.) is of this type. Although 

 differing in many ways, especially in size, from the present larvae, they have certain features in 

 common — telson much indented, rounded carapace, long and broad rostrum, endopod of antenna with 

 three setae. It is probable that they all belong to the same group, and as Clibanarius belongs to the 

 Eupagurus group, it follows that Gurney's remarks on the larvae do not apply here. We know too little 

 of the pagurid larvae to divide them into groups with any certainty — and study of the newly hatched 

 larvae of any known species is much wanted. 



Brachyura 



Occurrence (Stations). WS 979, 50-0 m., 3 Brachyrhyncha zoeae indet, stage I. WS 979, 100- 

 50 m., 1 Brachyrhyncha zoea indet., stage II. WS 980, 50-0 m., 3 Brachyrhyncha zoeae indet. These 

 are peculiar in having a very large telson spine externally on the fork. WS 980, 100-50 m., 

 1 Brachyrhyncha zoea indet., stage IV. WS 996, 100-50 m., 1 Ebalia zoea, 3rd and 4th stages. 

 WS 996, 250-100 m., 1 Ebalia megalopa. WS 997, 50-0 m., 4 Ebalia megalopae. WS 997, 250- 

 100 m., 1 Ebalia zoea, 4th stage, 1 Ebalia megalopa. WS 997, 1000-750 m., 1 Ebalia zoea, 1st stage. 

 WS 998, 50-0 m.; 18 Ebalia zoeae (1st to last), 1 Ebalia megalopa, 2 Brachyrhyncha zoeae indet., 

 1st stage. WS 998, 100-50 m., 1 Brachyrhyncha megalopa indet. WS 998, 175-100 m., 3 Ebalia 

 megalopa. WS 999, 50-0 m., 2 Ebalia zoeae, 1 Ebalia megalopa, 1 Brachyrhyncha zoea indet., 

 4th stage. WS 999, 150-100 m., 1 Ebalia megalopa. WS 1001, 100-50111., 1 Ebalia megalopa. 

 WS 1002, 50-0 m., 1 large Portunid megalopa indet., having the last legs with setose swimming 

 paddles. 



A number of crab zoeae occur in the collection and some megalopae. The commonest of these, 

 both zoeae and megalopae, belong to a species of Ebalia. The remainder are nearly all Brachyrhyncha, 

 some of which can be identified as portunids. 



Adult Ebalia live on the bottom and these larvae closely resemble E. tuberosa (Pennant), but differ 

 from it in having more setae on the last pleopods of the megalopa (Lebour, 1928). No colour was 

 present in the preserved specimen of the zoea and consequently it could not be distinguished from 

 that species. E. tuberosa is widely distributed and has been recorded from the Atlantic as far as the 

 Azores and Canaries. It may well be that the present form is closely related to it. 



