REPORT ON THE STOMATOPODA. 
55 
both the Atlantic and the Pacific, with slight differences between the specimens from 
widely separated localities, and Pseuclosquilla oculatct, Brulle, from the Canaries and 
Madeira, may possibly prove to be one of these varieties of Pseudosquilla ciliata, but 
the species of Pseudosquilla all need careful revision, as there is evidently considerable 
variability. Peculiarities of colouration are unsafe guides in the study of preserved 
specimens, and most of the other marks for the discrimination of species are known to 
vary. Thus Heller says that his Pseudosquilla oculata ( Pseudosquilla ornata, Miers) 
may be distinguished from Pseudosquilla stylifem ( Pseudosquilla ciliata, Miers) by the 
fact that the spine of the uropod is longer than the endopodite, but Miers’ figure of 
Pseudosquilla ciliata (Squillidse, pi. iii. fig. 8) represents the spine as longer than the 
endopodite uropod, and this is true of the Challenger specimens also. 
Genus Gonoclactylus, Latreille. 
Diagnosis. — Stomatopoda with the sixth abdominal somite separated from the 
telson by a movable joint ; the hind body convex ; and the clactylus of the raptorial 
claw enlarged at the base, and without marginal spines. Larva, an Erichthus, has the 
postero-lateral spines of the carapace near the dorsal middle line, the lateral edges not 
infolded, and hatches from the egg as an Erichthoidina, which becomes converted into 
an Erichthus without the loss of any of its appendages. 
Remarks. — All the Stomatopods with a dilated unarmed dactylus on the second 
maxilliped are usually grouped in a single genus, Gonodactylus, but the collection of 
species which are thus brought together is a very heterogeneous one, and little examina- 
tion is necessary to show that the genus, as usually characterised, includes at least three 
distinct assemblages of species. The species which have the sixth abdominal somite 
immovably fused with the telson are obviously more closely related to each other than 
they are to the other species of Gonodactylus, and as this fact should find its expression 
in the systematic zoology of the group I have placed these species by themselves in a 
distinct genus Protosquilla, retaining in the genus Gonodactylus only those species 
which have the telson movable. In the genus as thus restricted, two species, Gonodac- 
tylus ( Squilla ) hradyi, A. Milne-Edwards, and Gonodactylus trachurus, Miers, differ 
from all the remaining species in many features, such as the small size of the eyes, the 
scales of the second antennae and the uropods ; the depression of the hind body, and the 
presence of dentations on the inner edge of the dactylus of the raptorial claw. The pro- 
priety of separating these species from the true Gonodactyli seems obvious, and as they 
present many points of resemblance to both Lysiosquilla and Squilla, 'especially to the 
least specialised species in these two genera, I suggest for them the generic name, 
Coronida, compounded from Coronis, the generic name proposed by Latreille for the 
Lysiosquillse with dilated appendages on the exposed thoracic limbs, and Chlorida, 
