544 REPORT ON" THE ORDER STOMATOPODA—BIGELOW. vol.xvii. 



t t Body short; cai'apace large and wide, iufolded ou the ventral side, with 

 promiueut ventral angles, and posterior lateral angles widely sepa- 

 rated from the median line. 

 Hind body wide and flat; telson wider thnn long. 



Lysioekk iiTHUs, Brooks. (Larva of Lysiosquilla). 

 * * Alima Vovww Telson iisnally octagonal in general ontline with nnmerons 

 intermediate denticles. 

 t Basal spines of each nropod small and equal. 



Body short and broad, uearlj' covered by the carapace, Avhicli is folded 

 downward and inward. 



Erichthau.ma, Brooks. (? Larva of Couonida). 

 t t The inner one of the basal spines ou each uropod the longer. 



Hind body short and broad; carapace broad, covering all but the last 

 thoracic segment, but not folded in at the sides. 



Alimerichtiius, ClauB. (? Larva of Squii.la [Chloridella]). 



Body greatly elongated; carapace flattened, elongated, and narrow 



(about ^ as wide as long) ; usually se\eral thoracic segments 



exposed Alima, Leach. (Larva of Squilla). 



General remarks on the collection. — The collectiou of larvae is of cousid- 

 derable size, but it is not worth while for us to linger over it, for it con- 

 tains but few forms of special interest, no consecutive series, and no 

 stages that can be assigned with certainty to any adult species. The 

 most striking features are the quantity of large Lysioerichtlii from the 

 Atlantic and the number of very large Alim* from the Bay of Panama. 

 The former resemble the specimen figured by Brooks (188G) in pi. x, fig. 

 7. and which he regards as the young of LysiosquiJla maculata. The 

 latter are of two species, one with a very wide carapace and the other 

 with a narrow one. It seems probable that these will be found to be the 

 larviie of the two large species of Squilla that are common at Panama — 

 S. 2)anamcnsi.s and S. hiformis. 



The larva^. of stomatopods arc^ sometimes to l)c found in immense 

 schools. While with the Johns Hopkins University ■Marine Labora- 

 tory at Bimini in the summer of 1892 I found a few stomatopnd larvfe 

 of various kinds and stages almost every time that the towing net was 

 used, but after dark on the evenings of July 10, 20, and 21 the towing 

 nets were crowded with an immense numl)erof very small Gonerichthi, 

 apparently identical with the form represented by Claus (LS71) in his 

 fig. 22 B. 



THE ODONTERICHTHUS LARVA, 



Two specimens among the larvje from the Atlantic are of especial 

 interest. They are probably in the last larval stage and exhibit most 

 of the characters of Gonerichthi except that lateral teeth are to be 

 seen beneath the larval skin on the dactylus of the raptorial limb. It 

 is evident that they can not be larvai of Gonodactylus, but, if Brooks 

 is right in regard to the relations of the larval forms, the specimens 

 before us must belong to a genus very closely related to Ootodacti/bis. 

 The nearest one is Odontodactylus^ and it seems probable that these 



