REPORT ON THE STOMATOPODA. 
113 
The ad ult genus Pseudosquilla is not sharply limited, as the various species are very 
closely related to Gonodactylus on the one hand, and to Coronida and Coronis on the 
other, and we should not expect the larval type to be more definite than the adult, and 
as a matter of fact the collection contains larvae which closely resemble Pseuderichthus 
although they may possibly be Gonodactylus larvae, and others which may possibl y be 
Lysiosquilla larvae. 
The Challenger collection contains very few young larvae of this type, and I have 
not been able to trace its metamorphosis, although Claus has given reasons for 
believing that it hatches as an Erichthoidina, and afterwards undergoes a retrograde 
metamorphosis, loosing and afterwards redeveloping all the thoracic appendages, except 
the first and second pairs. 
The Erichthoidina from St. Vincent, shown in PI. XII. fig. 3, may possibly be a 
young Pseudosquilla , although it more closely resembles the Gonodactylus Erichthus. 
The Gonerichthus larva and the Metamorphosis of Gonodactylus. 
The last larval type which I shall discuss is represented in the Challenger collection 
by numerous specimens, a few of which I have selected and drawn. 
One of these, from St. Vincent, is shown in PI. XII. fig. 5, while the telson and 
uropods of another specimen, from the Celebes Sea, in the same stage of development, 
and belonging to the same or a closely related species, are shown in PI. XIII. fig. 9. 
The fully grown larva, i nc h es long, °f another species from the West Pacific, 
lat. 17° 29' N., long. 14 V 21' E., is shown in profile in PI. XV. fig. 11, and from above 
in fig. 6, and the telson and uropods of a closely related species lit inches long, from 
Volcano Island, in the West Pacific, are shown, more enlarged, in fig. 7. 
The carapace of another species, inch long, from the Celebes Sea, is shown in 
PI. XV. fig. 1, and the telson of a young Gonodactylus of the Chirayra type in the adult 
condition is shown in PI. XVI. fig. 5. This specimen, which is inches long, was taken 
with the trawl in 18 fathoms, west of the Philippine Islands, at Station 208. This latter 
specimen had the raptorial claw fully developed, and it exhibited all the characteristics of 
the adult Gonodactylus. It is certainly a young Gonodactylus closely related to, or 
possibly a specimen of, Gonodactylus chirayra , and a comparison of its telson and uropods 
with those of the various larvae which have just been noticed will show that there is the 
closest agreement in every particular. In all of these larvae, as in the young Gono- 
dactylus, the sixth abdominal somite has a pair of submedian spines near its posterior 
edge, and its postero-lateral angles are produced into acute spines. The telson is slightly 
wider than long, its submeclian spines are long and slender, but shorter than they are in 
Pseuderichthus, and without the movable spinules of the latter. The telson is notched 
on the middle line, and there are from fourteen to twenty small secondary spinules on 
(zool. CHALL. EXP. PART XLV. — 1886.) Yy 15 
